Catalog #70405
Thank You….
…for purchasing an Edelbrock Nitrous Oxide Injection System.
Nitrous Oxide injection is one of the most exciting performance enhancements, for the dollar invested, on the market today. With the
use of nitrous oxide come some important safety considerations. This manual has been written to help you during the installation
and use of your Edelbrock Nitrous System. Please read it completely before you install and use your system. Please pay close
attention to the safety information at the beginning of each section. The information contained there specifically pertains to each of
the components and installation methodologies within the section.
Please take the time to read and understand the following….
By installing your Edelbrock Nitrous System, you indicate you have read this document and you agree with the terms stated below:
It is the responsibility of the purchaser to follow all installation instruction guidelines and safety procedures supplied with the
Edelbrock Nitrous Systems. It is also the responsibility of the purchaser to determine the compatibility of the product with the vehicle
or the device on which the purchaser intends to install it.
Edelbrock Corporation assumes no responsibility for damages occurring from misuse, abuse, improper installation, improper
operation, lack of responsible care, or all previously-stated reasons resulting from incompatibility with other manufacturer’s products
and/or systems.
Edelbrock Corporation neither recommends nor condones the use of products manufactured or sold by Edelbrock Corporation for use
on vehicles, which may be driven on public roads or highways, and assumes no responsibility for damages incurred by such use.
Edelbrock Corporation assumes no responsibility for damages incurred by the use of products manufactured or sold by Edelbrock
Corporation on vehicles used for competition or racing.
Before You Install Your Edelbrock Nitrous System…
Please read this Installation manual fully before installing this system.
You will need to have available the following tools:
Hand Tools:
❑ Socket set including ratchets and extensions
❑ Screwdrivers
❑ Pliers
❑ Bench vise
❑ Wire crimping pliers, wire strippers
❑ Floor jack
❑ Razor blade or other sharp, flat edged cutting instrument
❑ Vehicle jackstands
❑ Safety glasses
❑ Timing light
Power Tools:
❑ Power drill
❑ Drill bits
You should understand the following skills:
❑ Power tool safety procedures
❑ Undercar safety procedures
❑ Proper measuring techniques
❑ Proper electrical assembly techniques
❑ Basic engine operation and tuning techniques which include:
-Fuel pressure measurement techniques
-Timing adjustment techniques
Nitrous Oxide is a cryogenic gas composed of nitrogen and oxygen molecules. It is stored as a “gas over a liquid” which means that
both liquid and gaseous nitrous oxide is delivered into your engine. It is 36% oxygen by weight, which is what produces the added
horsepower. By injecting more oxygen (and a corresponding fuel signal), we create the additional power much like a supercharger
or a turbocharger does.
Nitrous Oxide is considered an “oxidizer” and not a fuel. Nitrous oxide is non-flammable by itself. Because nitrous oxide is a
cryogenic, the same safety methods in handling dry ice apply to nitrous. Direct contact with the skin will cause a burn similar to
contact with dry ice. The exception in using nitrous oxide comes from increased breathing hazards associated with the gaseous
properties of nitrous oxide.
Nitrous Oxide is offered for sale in two common grades, which are U.S.P., and Nytrous Plus. U.S.P. nitrous oxide is medical grade
nitrous oxide. Its common use is dental and veterinary anesthesia as well as use as a propellant in food such as canned whip cream.
U.S.P. is not available to the public and would provide no advantage in the making of horsepower over the automotive grade nitrous
Nytrous Plus was specifically designed for automotive consumption and differs from U.S.P. in that it contains trace amounts of sulfur
dioxide (100 parts per million or “PPM”) added to prevent substance abuse. The Sulfur Dioxide is an irritant to all of your breathing
passageways and will cause sore throats and sore nasal passages. Nytrous Plus was specifically created for automotive applications
and is available for sale to the public at many speed shops across the USA.
Safety Steps For Working With Nitrous Oxide
1. Never inhale Nytrous Plus (Nitrous oxide (N2O) for vehicular use) as continued exposure can cause death. Nytrous Plus
has a maximum of 100 parts per million (ppm) of sulfur dioxide and will cause irritation to nose and throat passageways.
2. When working around any high-pressure gas including nitrous oxide, take all precautions to ensure that exposure to
nitrous oxide is minimized.
3. Do not vent nitrous oxide to atmosphere in confined spaces. Only vent nitrous oxide in well-ventilated and open areas.
4. Liquid nitrous oxide can cause burns to human flesh so protect all skin in and around your hands, arms and face.
Wear safety glasses and rubber gloves to protect from liquid nitrous oxide splatter.
5. When venting down the nitrous system, vent the line down closest to the nitrous bottle.
6. Do not use any form of Teflon tape as sealant on fitting connections. Use only Teflon paste.
7. When washing components, ensure the clean components are completely dry, free of oils, and solvents. Failure to
remove all liquids could cause component or system failure.
8. Always turn the bottle off before making any repairs to the nitrous delivery system.
9. To safely release nitrous oxide in a pressurized line;
a. Position vehicle in a well-ventilated, unconfined space.
b. Turn bottle off.
c. Slowly loosen the nitrous feed line at the bottle until you hear a light hissing noise.
d. Allow the entire nitrous pressure to vent from the line.
e. Perform your work on the system.
f. Tighten the nitrous line to the bottle.
g. Slowly open the nitrous bottle valve, listening for leaks.
h. Perform leak checks on all affected fittings and the bottle fitting.
Introduction to your Edelbrock 4.6L Mustang Performer EFI Nitrous System
Within the pages of this manual is information, safety tips and operation instructions for your new Edelbrock Nitrous System. Watch
for these symbols to know where to go for information.
….There is safety related information here.
℡ ….call Edelbrock Technical support hotline for more information.
….shows where technical information about your vehicle or specific skills that may help during
General Information
The Edelbrock 4.6L Mustang Performer EFI Nitrous System (Part Number 70405) is designed for
1999-Later Mustang vehicles equipped with stock or slightly modified 4.6L engines that utilize the
returnless style fuel system. Horsepower and torque increases can vary with equipment upgrades and
The system utilizes one nozzle that is installed in the intake boot just after the MAF (mass air sensor) filter and
before the throttle body. The additional fuel needed is supplied by the vehicle’s standard fuel system.
This system has been designed with some flexibility as to where certain components can be located to allow easy
installation on vehicles with upgraded or modified equipment . The solenoid and microswitch brackets are designed
to be manipulated (bent, cut, twisted, etc.) and the electrical components have properly sized and ample lengths of
This system includes the bottle (shipped empty), bottle feed line and universal footprint steel bottle brackets. The
mounting brackets also include rubber insulators to protect the surface of your nitrous bottle while mounted in the
brackets. When installing your nitrous bottle, pay close attention to the installation instructions for the location of
your bottle. Make sure that the installation of your bottle does not interfere with any systems that may lie under
the location where you plan to drill holes for mounting the brackets.
Contact your local automotive store, motorcycle shop or race track for refilling of your bottle. Trust a professional
to properly fill your bottle and reference your installation manual when re-installing your filled bottle back into your
Always take care when handling a full bottle of nitrous oxide. Please reference this manual for further safety
measures to take during the handling of a nitrous oxide bottle.
Please follow all safety methods during the installation of your Edelbrock Nitrous System, and follow all vehicle
regulations and road laws when using your nitrous system.
Jet Map Information
Edelbrock Engineering has conducted dyno testing with the Edelbrock 4.6L Mustang Performer EFI system to ensure
the horsepower increase with the nitrous system is as intended. On a typically stock 4.6L Mustang engine, you can
expect the following approximate power gain:
Nitrous Jetting
Approx. HP Gains
Final Air/Fuel Ratio
Potentiometer Setting
Fully Counter-Clockwise
The dyno tests were conducted at Edelbrock using a stock 4.6L engine. These tests were conducted with 950 psi
nitrous bottle pressure.
Engine Operation Considerations
When used correctly, nitrous oxide safely elevates cylinder pressures and temperatures while increasing
combustion rate. These characteristics make the engine more sensitive to detonation. To ensure proper
performance, engine and drive line life, the following tips are suggested:
• System Jetting
Never exceed the recommended jetting!! Excessive jetting will result in severe engine damage.
• Fuel Quality
Because Nitrous oxide is an oxidizer, fuel selection is critical. Both octane and fuel consistency affect fuel burn rate.
The oxidizer quality of nitrous oxide will accelerate the burn rate, so we recommend a high quality of gasoline. We
also recommend you use the same grade of gasoline every time you use your nitrous oxide system. This will help
maintain the same fuel burn rate every time.
• Ignition Components
Most aftermarket performance chips increase the vehicle’s ignition timing, which can cause detonation with the use
of nitrous oxide. Please consult with your chip manufacturer on information regarding the compatibility of your chip
with nitrous oxide use.
If your vehicle is equipped with platinum type spark plugs, we highly recommend they be removed and replaced
with the equivalent standard type spark plug.
• Engine System Upgrades
With all performance modifications, complementary system upgrades will always serve to elevate the consistency
and longevity of an engine, especially when using nitrous oxide as a power adder. Modifications such as ignition
upgrades, free-flowing exhaust, camshafts, cylinder heads, manifolds can all add to the performance of a nitrous
oxide injected engine.
Performer Kit Bill of Materials
1 ea.
1 ea.
1 ea.
Nozzle and Nozzle Hardware
Nitrous fan spray nozzle
Nitrous fan spray nozzle bulkhead body bolt
Nitrous fan spray nozzle bulkhead concave nut
2 ea.
1 ea.
1 ea.
4 ea.
1 ea.
1 ea.
1 ea.
1 ea.
1 ea.
Solenoids and Solenoid Hardware
Performer nitrous solenoids
Solenoid tee 1/8 NPT male x 1/8 NPT female x
1/8 NPT male
EFI solenoid mounting bracket
Solenoid mounting screws (8 x 32 UNC x 5/16”)
1/8 NPT Plug
N2O Filter Fitting, 4AN x 1/8” NPT, Blue
3AN x 1/8” NPT Nitrous Fitting, Blue
Microswitch mounting bracket
24” 3AN steel braided hose 90-degree on
one end
1 ea.
Jet .042
1 ea.
1 ea.
1 ea.
1 ea.
Fuel Pressure Safety Switch and Hardware
Fuel pressure safety switch
1/8 NPT female -4AN female swivel
1/16 NPT male x 1/8 NPT female
90 deg. 4AN female x 4AN male
1 ea.
1 pr.
1 ea.
1 ea.
Bottle and Bottle Hardware
10-lb., Nitrous Bottle
Nitrous Bottle Bracket Set (1 Tall, 1 Short)
660 Bottle Nut and Teflon Washer
14’ Nitrous Feed Line, Bottle to Solenoid
2 ea.
1 ea.
Electrical System Components
Electrical Component Packages
(see “3.0 Electrical System Installation”
Voltage Booster Unit
Nitrous System Installation
Nitrous Bottle Installation
The nitrous oxide storage cylinder is typically called a “nitrous bottle”. It is an aluminum cylinder, designed and
manufactured to withstand very high pressures. The valve on top of the bottle is a high-flow design that allows
easy opening and closing which controls the nitrous flow to the engine compartment.
Accurate calibration of your nitrous system depends on the bottle remaining at a stable temperature. In vehicles
(such as Corvettes) where the bottle must be mounted in an area subject to direct sunlight, it is suggested that the
bottle be shielded with a bottle blanket.
If the bottle is mounted inside the passenger compartment or in a space that has access to the passenger
compartment such as hatchbacks or vehicles that feature fold down rear seats, the pressure relief device (PRD
valve) must be vented externally from the cockpit. This procedure will prevent the passenger compartment from
filling with a cloud of nitrous oxide, should the safety pressure relief valve rupture. For more information, please
contact the tech line.
Special consideration should be made to protect the bottle installation by not placing the bottle in a known crumple
or crash zone within the vehicle. At no time should the bottle be mounted within the seating area of the passenger
compartment of a street-driven vehicle.
Performer Bottle Valve
Pressure Relief
Device (PRD)
660 High Flow
Nitrous Exit
Here is the Performer Bottle Valve. Installed on all bottle valves used
in Edelbrock Nitrous Systems, is a Pressure Relief Device or “PRD”. It
is a safety valve designed to vent the contents of the bottle into the
atmosphere in case of a catastrophic event like a collision. It is also
installed to prevent the over-pressurization of the bottle. Unsafe bottle
pressure is caused by over filling or elevated bottle temperatures.
There are two types of PRDs - Internal piping and external piping. The
internal type requires no additional parts. The external type requires a
safety blowdown tube designed to route the gas, if the PRD happens
to rupture, to the outside of vehicle. The internal type is design to vent
directly off the bottle into the atmosphere.
It is illegal to tamper with or remove this device.
Bottle Safety Information
1. Do not attempt to remove the bottle valve. Please return your bottle to Edelbrock if service is required to the siphon
tube inside the bottle or the bottle valve itself.
2. Never heat the outside of your nitrous bottle with an open flame like that of a torch.
3. Do not strike the surface of your nitrous bottle with a heavy or sharp object.
4. Do not drop your nitrous bottle.
5. Do not attempt to grind off or destroy any imprinted markings on the face of the bottle.
6. Do not remove, modify or otherwise tamper with the safety valve on the bottle valve.
7. Do not attempt to use a bottle that has been damaged or tampered with.
Racing Vehicles
Before you mount a nitrous bottle in a vehicle intended for use in racing or sanctioned events, check with the sanctioning
association or local racetrack for any rules regarding bottle installation. Most associations require the bottle be mounted
within the confines of the safety roll cage, with the safety pressure relief cap vented away from the driver’s compartment.
Bottle Orientation
Accurate calibration of your nitrous system depends on the bottle remaining at a stable temperature. Choosing the
proper location and orientation for your bottle can greatly affect the overall operation of the nitrous system. Please
read the entire bottle mounting instruction section before making your final bottle location decisions.
Bottle placement is critical to the performance of your nitrous system. It is important to understand how the bottle
valve and siphon tube are assembled to properly orient the bottle in your vehicle and ensure that it picks up liquid
nitrous while undergoing acceleration. All nitrous bottles are assembled so that the bottom of the siphon tube is at
the bottom of the bottle, opposite the bottle label.
An Edelbrock nitrous bottle cannot be mounted upside-down. Edelbrock does not offer a non-siphon tube bottle for
automotive use. If the bottle must be mounted parallel to the axles of the vehicle (sideways), the label must be
angled at approximately 45 degrees toward the front of the vehicle. This orientation will position the siphon tube
toward the rear and pointing to the lower rear-facing quadrant of the bottle. All of this positioning information is
critical to system operation. It is most important to draw as much liquid nitrous as possible. The siphon tube cannot
do this unless the bottle is positioned correctly.
The most efficient mounting is the lay-down position with the valve handle toward the
front of the vehicle. This position allows the greatest amount of liquid to be used
before the siphon tube begins to pick up gaseous nitrous oxide.
Nitrous Bottle Installation
After you have determined the location and orientation of the nitrous bottle, use the following procedure to install
the bottle:
Street Car Installations
1. Disconnect vehicle’s battery.
2. Determine the location of the bottle within the confines of the rear of the vehicle.
3. Once a mounting location has been determined, raise the vehicle (following all safety practices involved in
working on a vehicle from under the vehicle) and verify that there are no fuel lines, fuel tank(s), brake lines,
emissions equipment, or structural members in the way of potential mounting bolt locations.
Note: It may be necessary to remove the fuel tank depending on the location where you install the bottle.
4. Install the rubber insulators within the bottle brackets.
5. Slip bottle into the mounting brackets.
6. Using the mounting bracket bolt holes as templates, mark an area for each of the brackets with chalk, metal
marking pen, scribe, or marking pen to locate the bolt placements for drilling.
7. Drill two (2) 3/8” mounting holes for each bracket.
8. If heater blanket is used, brackets must be installed 8-1/2 inches apart from each other.
9. Install the bottle mounting brackets using “Grade 8” bolts, nuts and flat washers (not included with kit). Use
fender washer underneath the vehicle for sheet metal mounting.
10. Tighten the mounting bolts using a thread locking compound (not included with kit).
11. Mock up Safety Blowdown tube on bottle to find where tube will go through floor.
12. Mark floor where tube appears it will go.
13. Using a 1/2” drill bit, drill through floor on mark.
14. Install Safety tube on bottle and cut off excess tube so that only 1 to 2 inches are protruding below floor.
Shown here is a bottle with a bottle bracket properly installed with the
rubber insulator. The distance between the bottle brackets is
somewhat adjustable. Remember, mount the short bottle bracket at
least 1” from the bottom of the bottle, and never cover any of the
bottle label with a bottle bracket.
Do not attempt to install the bottle in the bracket without the rubber
insulator. The bottle hoop on the bracket is designed to include the
thickness of the insulator.
Race Car Nitrous Bottle Installations
Install the bottle brackets in accordance to race track and/or sanctioning body rules. Contact the factory
for assistance with meeting sanctioning body rules.
2.3.3 Nitrous Bottle Installations For Vehicles With Hatchbacks Or Trunk Areas That Are Connected
With The Passenger Compartment.
Nitrous Feed Line Mounting
1. Determine the route your main nitrous feed line will follow. Ensure the path does not route the nitrous feed line
too close to the exhaust system, suspension, electrical lines/components or tires.
2. Attach nitrous supply line to bottle.
3. Feed nitrous line along proposed route.
4. Secure nitrous supply line to underside of vehicle.
Note: Stainless steel covering of the main nitrous feed line is very abrasive. Shield painted components or
sensitive system components like electrical, fuel lines, brake lines or suspension components to prevent them
from contacting main feed line. Rubber hose can be slid over and retained as a chafe guard.
5. Leave nitrous line loose pending installation of nitrous solenoid.
Solenoid Mounting
Use the following procedures to install the Performer nitrous solenoids.
Note: Remember to use Teflon paste only on pipe threads. Do not use Teflon tape.
Placement of the solenoid is often limited by the lack of possible mounting locations in the engine
compartment. However, if possible, observe the following suggestions:
Solenoid Safety Information
1. Keep solenoids and lines away from exhaust components.
2. Trial fit the solenoids with all lines attached to ensure a proper fit.
3. Solenoids may be mounted sideways or upside-down, if necessary.
Nitrous Solenoids Mounting
1. Locate the EFI solenoid bracket, solenoids, inlet fitting, outlet fitting, plug, solenoid tee, and solenoid
mounting screws.
2. Hold one of the nitrous solenoids securely (like in a bench vise) being careful not to harm the solenoid
or block the inlet or outlet port of the solenoid.
3. Install the nitrous filter fitting (Blue fitting 4AN X 1/8 NPT), using liquid Teflon paste, in the inlet port of
the nitrous solenoid.
4. Install one of the 1/8 NPT male sides of the solenoid tee, using liquid Teflon, on the outlet port of the
nitrous solenoid. The female port of the solenoid tee should be facing outward.
5. Install the remaining 1/8 NPT male end of the solenoid tee, using liquid Teflon, into the inlet port of the
second nitrous solenoid. Rotate the second solenoid so that it parallels the first.
6. Install the 3AN X 1/8 NPT (blue straight fitting) into the outlet port of the second nitrous solenoid.
7. Install the 1/8 NPT Male Plug into the female 1/8 NPT hole on the solenoid tee. Be sure to use liquid
Teflon on the threads of the plug to prevent leakage.
8. Verify the desired mounting location for the solenoid assembly.
9. After the mounting location is determined, tighten all the fittings.
10. Remove the assembly from the vise and mount the solenoid bracket to the solenoids.
11. Leave all wiring loose for electrical systems installation.
12. Connect the main nitrous feed line to the inlet fitting (4AN X 1/8 NPT nitrous filter fitting) of the first
nitrous solenoid.
Here is a typical EFI solenoid assembly, mounted in the engine
compartment of a vehicle, using an unmodified EFI solenoid
bracket. Modifications performed to a solenoid bracket depend
on many factors. When mounting the solenoid assembly on a
vehicle, considerations should be taken regarding any potential
interference with the vehicle’s systems or components.
The line length between the Performer 4.6L Mustang solenoid
assembly and the jet fitting on the nitrous spray nozzle is 24
inches. This should also be considered when mounting the
solenoid assembly.
Nitrous Spray Nozzle Installation
1. Determine nozzle mounting location in intake boot, between
the MAF sensor and the throttle body. Make sure the nozzle,
mounting collar, and the feed line from solenoid to nozzle, do
not interfere with any systems or components of the vehicle
such as the hood latching device.
2. Mark where the nozzle will be placed.
3. Remove the intake boot.
4. Drill a 7/16” hole in the intake boot where nozzle placement
was determined.
5. Be sure to clean out the rubber shavings you made when
drilling to prevent engine damage.
6. Install nozzle mounting nut and collar onto intake boot.
Nozzle should be placed in the intake boot so as
7. Using liquid Teflon, install the spray nozzle into mounting
to have a clear path to the throttle body. Try to
keep the nozzle from having to travel through the
8. Mark the spray direction on the nozzle. Be sure the nozzle
bend in the intake boot and as close to the
discharge is towards the vehicles engine.
throttle body as possible.
9. Install the .039 jet into the nozzle fitting.
10. Install 3AN line from solenoid outlet fitting to spray nozzle jet fitting and tighten securely.
11. Install the intake boot.
Fuel Pressure Safety Switch Installation
1. Locate the fuel rail test port fitting.
2. Make sure the vehicle’s engine is cool. Release pressure in
the fuel system by pressing down on the valve in the center
of the fitting. This will allow the pressure to escape as well
as some fuel.
3. After relieving all pressure, remove test port fitting core and
install the 1/16 NPT male X 1/8 NPT female brass fitting in
its place, using liquid teflon paste.
4. Using liquid Teflon paste, install Fuel Pressure Safety Switch
into the 1/8 NPT female adapter end.
Note: On some vehicles, there is no test port fitting, or the
location of the test port fitting does not allow ample room for the fuel pressure safety switch to be mounted.
These applications will require a “Banjo Nut” at the fuel filter to be drilled and tapped to allow mounting of the
safety switch.
Electrical System Installation
Nitrous Electrical Components Bill of Materials (BOM)
Item #
1 ea.
Activation microswitch
1 ea.
Activation microswitch bracket (not shown)
2 ea.
Activation microswitch mounting nut
2 ea.
Activation microswitch mounting screw
1 ea.
30 amp relay
1 ea.
Wire harness with integral relay/fuse holder
1 ea.
Red lighted toggle switch
2 ea.
18/22g female spade connector, Nylon insulated
2 ea.
14/16g female spade connector, Nylon insulated
1 ea.
14-16g male spade connector, Nylon insulated
1 ea.
16/18, splice connector
1 ea.
14/16g 3/8” ring terminal, Nylon insulated
3 ea.
18/22g ring terminal #10 Stud, Nylon insulated
2 ea.
18/22g ring terminal #8 Stud, Nylon insulated (.187)
2 ea.
18/22g female spade connector, Nylon insulated
1 ea.
15 amp ATO blade fuse
Nomenclature Descriptions:
ATO… the fuse configuration is ATO. When replacing this fuse, ask for an ATO fuse.
“a”… Amperage.
Important: The wiring hardware and instructions included with this kit are intended for 12-volt electrical systems only.
Before attempting to wire your Edelbrock Performer nitrous oxide system, examine and follow the wiring diagram on
the following page. Please call the Edelbrock Technical department with any questions concerning electrical wiring.
When working with electrical systems in your vehicle, it is a good idea to have a service manual that features your vehicle.
It is also good practice to have a book that specializes on the specialized techniques required when working with
vehicular electrical systems.
3.2 Nitrous Electrical System Wiring Diagram
Nitrous Electrical System Installation Procedures
Determine the location of the relay and fuse holder wire harness. Most common installations locate these
components inside the driver’s compartment and close to the fuse panel under the dash. You can also mount the
relay and ruse holder harness close to the battery. However, these connectors are water-resistant not waterproof,
so care is required when mounting this assembly under the hood of your vehicle.
Wire Schematic Origin and Destination Map
Wire Color
Main System Bat.
Voltage Arming Switch
Solenoid Power
Solenoid Power
Relay Power
Arming Switch Ground
Relay Ground
Microswitch Ground
Solenoid #1 Ground
Solenoid #2 Ground
Safety Switch
Fuel Pressure
Safety Switch Ground
Relay Harness
Bat. Volt. Signal
Terminal Used
Arming Switch
Switched 12V
Relay Harness
Relay Harness
Arming Switch
Relay Harness
Solenoid #1
Solenoid #2
Solenoids #1 & #2
Arming Switch
Chassis Ground
Chassis Ground
Chassis Ground
Fuel Pressure
Fuel Pressure
Safety Switch
Chassis Ground
Nitrous Relay and Fuse Holder Installation
The wire harness attached to the relay and fuse holder includes 8 feet of color-coded wires to make the electrical
system installation for your Edelbrock Nitrous System as easy as possible. We recommend that you do not cut any
lengths of wires from the wire harness or complete the wiring of the nitrous system until all of the mechanical
components are securely mounted in their permanent locations.
Once all of the solenoids and switches are placed, then route the un-cut wires from the harness to each location
allowing enough wire length on each circuit to not interfere with operating linkages, heat sources, brackets, etc.
Pay particular attention to sharp edges along the route of your wire harness as they can chafe the wire and cause
your system to fail.
After you have accounted for the routing of your wires, follow the Wire Harness Schematic on page 15 and use the
Origin and Destination Map as a guide for which electrical connectors are used in each circuit.
Once you have decided the location of the relay and fuse holder, secure them with fasteners (not included with kit)
such as sheet metal screws, bolts and nuts, etc. Allow for some slack in the red wire that connects the relay and
fuse holders together.
When mounting your relay and fuse holder, make sure the mounting surface is strong enough to support servicing
the relay and fuse. Also, ensure you allow for some slack in the wire that joins the fuse holder to the relay mount.
This will avoid any potential loss of power due to stress on the wire harness.
The fuse is covered by the fuse mount housing.
The relay for the Performer system is rated for 30 amps, and the fuse is 15 amps.
Arming Switch and Installation
The arming switch is a red, lighted switch that is a “MASTER” arming switch for your nitrous system. Without it,
your nitrous system would be “on” all of the time and capable of engaging anytime you go to wide-open throttle
conditions with your vehicle. The switch, when in the “armed” position, is well lit. Therefore, it should be placed in
an obvious position well within the line of sight and easy reach of the driver. Please refer to the procedures below
for the installation of the arming switch:
Locate the final position of your arming switch.
Drill a .450” (approx. 29/64”) hole for the switch location.
Insert the switch from behind the mounting hole and secure with the switch nut.
Do not wire until all other mechanical components are in place. Please see the electrical system installation
instructions for further information.
Note: There is a collar included with the switch for applications that require special spacing during installation.
Microswitch Installation and Wiring
The function of your microswitch is to enable your nitrous system. It should be installed so that the switch is forced
closed by coming in contact with the throttle linkage only at the wide open throttle position. The nitrous system
must only function at fully-loaded wide-open throttle.
1. Do not allow wiring from the microswitch to come in contact with heat sources on the intake manifold such
as EGR risers or passageways.
2. Do not run wires to the microswitch that can create interference with the operation of the throttle linkage.
3. The microswitch must be located in such a way as to be clear of the normal operation of the throttle linkage.
4. Do not directly expose the microswitch to liquids such as water or gasoline.
This is a picture of an un-modified and “ready to install” microswitch assembly. The microswitch
bracket has several mounting positions available for clocking of the switch. It also is of a universal
length and can be attached to several positions on and around the throttle body.
Microswitch Installation and Wiring (continuation)...
The bolts used to attach the microswitch have extra length to allow for spacing the microswitch away from the
bracket to offer a level of adjustability of the microswitch. After determining the position of the microswitch, we
recommend trimming the bolts for a clean installation.
Due to the wide variety of throttle linkage combinations in use, it is impossible to supply a microswitch bracket
custom tailored to each application. The universal bracket supplied will need to be modified to fit your specific
Here is a microswitch assembly mounted for use. It
is an example of one of many ways in which to mount
a microswitch on your throttle body. The microswitch
bracket allows for many different mounting positions.
The microswitch bracket can be modified to clear
almost any potential interference around the throttle
The microswitch bracket supplied is drilled to permit
many different switch mounting positions. This
flexibility allows for the microswitch to be positioned
in such a manner to engage the throttle body linkage
without interfering with its normal and safe operation. The bracket may be manipulated (bent, twisted, and/or cut)
to best suit your combination. Mount the microswitch on the throttle body so the actuation arm is triggered by the
throttle linkage making sure that all wiring and the bracket do not interfere with the smooth and safe operation of
the throttle body. Be sure the actuation arm “clicks” at the point where the throttle is wide open.
Final Electrical Installation Recommendations
At this time, it is advised that you double-check the following areas:
1. Double Check all wires so that they do not come in contact with any heat sources like exhaust manifolds, and
EGR crossovers, etc.
2. Double Check the wires that lead from the microswitch to ensure that they do not interfere with the operation
of the throttle body linkage.
Voltage Booster Unit Installation and Wiring
Voltage Booster Relays Bill of Materials
2 ea.
2 ea.
2 ea.
2 ea.
1 ea.
2 ea.
2 ea.
2 ea.
30 amp Relay
Wire Harness with Integral Relay/Fuse Holder
15 amp ATPO Blade Fuse
16/18, Splice Connector
14/16g 3/8” Ring Terminal, Nylon Insulated
14-16g Male Spade Connector, Nylon Insulated
14-16g Female Spade Connector, Nylon Insulated
Butt Connector
Nomenclature Descriptions:
ATO...the fuse configuration is ATO. When replacing this fuse, ask for an ATO fuse.
Important: The wiring hardware and instructions included with this kit are intended for 12-volt electrical
systems only. Before attempting to wire your Edelbrock Performer Nitrous Oxide System, examine and follow
the wiring diagram on the following page. Please call the Edelbrock Technical Department with any
questions concerning electrical wiring.
When working with electrical systems in your vehicle, it is a good idea to have a service manual that features your vehicle.
It is also good practice to have a book that specializes on the specialized techniques required when working with
vehicular electrical systems.
Positive Output From
Voltage Booster Unit
Red To Fuel Pump +
& Fuse
Green From Fuel Pump +
Blue To + From VBU
Ground To Chassis
Voltage Booster Wiring Diagram
Pink / Brown
+ Fuel Pump
Green From Fuel Pump
Red To Fuel Pump
Blue To Ground On VBU
& Fuse
Black / Red
- Fuel Pump
Ground Wire From
Voltage Booster Unit
Intercept On Acc.
Wire On Toggle Switch
Voltage Booster Unit Installation Procedures
Determine the mounting location of your Voltage Booster Unit in the engine compartment of your vehicle. This unit
should be mounted as close to the battery as possible without coming in contact with the battery. Be sure to find
a location that is solid enough to support the weight of the voltage booster unit when under harsh conditions such
as heavy acceleration/braking or bumpy roads. The voltage booster unit should be mounted in a dry location in the
engine compartment since it is water-resistant, not water-proof. Once you have found a location, mount the unit
with either nuts and bolts, self-tapping screws, etc. (Not supplied with kit). You should also be sure that the
mounting location does not interfere with mechanical operations under the hood such as the hood clearance or
hood hinges.
Above is a picture showing the Voltage Booster Unit up close. Be
sure that when you mount the unit, you bolt down all four corners of
the unit to a secure mounting location. Be sure that you are in close
reach of the battery. Also, be sure to ground the unit directly to the
negative terminal of the battery.
Above is a picture showing the Voltage Booster Unit placement in
our Edelbrock Test Vehicle. This is the optimal mounting location for
the voltage booster unit under the hood of the vehicle due to there
being to mechanical devices for the unit to interfere with and the
unit can be mounted next to the battery.
Voltage Booster Unit Wiring Installation
Find the orange fused power wire coming from the side of the Voltage Booster Unit. Run this wire to the battery
12-volt positive terminal to be sure you have adequate line length to reach the terminal. Do not connect this wire
until you are finished with the voltage booster unit and voltage booster unit relay wiring, due to the risk of electric
Locate the black ground wire which should be located directly beside the orange fused power wire. Connect this
directly to the ground terminal of the battery.
Locate the light blue activation wire which should be on the opposite side of the voltage booster unit from the
orange fused power wire. Using one of the 16/18g splice connectors supplied in the voltage booster relay pack,
splice the light blue wire into the orange fused 12v power wire.
Run the red and the black wires which are located on the same side of the voltage booster unit through the vehicle
to the trunk compartment. Leave these ends non-terminated until you are instructed to connect them in the voltage
booster unit relay instructions.
Check all of the wires that you have just routed to be sure that they will not interfere with any of the mechanical
devices under the hood of the vehicle. Also, make sure that none of the wires are coming in contact with any
abrasive surfaces or sharp edges to prevent fraying the wires and possibly shorting out the voltage booster unit.
Voltage Booster Unit Relay Installation
The Voltage Booster Unit Relays need to be mounted in the trunk of the vehicle within range of the fuel pump wiring
harness. Please refer to the wiring schematic on page 18 for assistance is determining the origin and destination
of each wire. Determine a location in the trunk compartment that you can solidly mount the 2 relay harnesses. Be
sure that all of the wires will reach their given destinations before mounting the relays permanently. We recommend
that you mount the relays side by side and mark then “1” being the left relay and “2” being the right relay. For the
remainder of the relay wiring instructions, we will be referring to the relays as relay 1 and relay 2 to simplify the
1. Remove the floor carpet from the trunk and set aside.
2. Locate the factory fuel pump wire harness. This should be located to the right of the spare tire compartment.
The harness will consist of several wires bound together and covered with plastic tubing. Pull back the tubing
to give access to the individual wires.
2. Locate the brown wire with the pink stripe in the harness. Cut this wire several inches back from the plastic
bulkhead which leads down to the fuel pump. Terminate the end of the wire that travels into the plastic
bulkhead with a male spade connector.
3. Locate the red fused wire on relay 1. Terminate the end of this wire with one of the supplied female spade
connectors and connect this terminal to the male spade on the pink/brown wire.
4. Terminate the remaining pink/brown wire with a female spade connector. Terminate the green wire from relay
1 with one of the supplied male spades and connect to the female spade terminal of the pink/brown wire.
5. Locate the black wire with a red stripe in the harness. Cut this wire several inches back from the plastic
bulkhead which leads down to the fuel pump. Terminate the end of the wire that travels into the plastic
bulkhead with one of the supplied female spade connectors.
6. Locate the red fused wire on relay 2. Terminate the end of this wire with one of the supplied male spade
connectors. Connect this terminal to the female spade connector on the red/black wire.
7. Terminate the remaining red/black wire with the remaining male spade connector.
8. Locate the green wire from relay 2 and terminate the end of the wire with the remaining female spade
connector. Connect this terminal to the male spade on the red/black wire.
9. Using one of the supplied butt connectors, connect the blue wire on relay 1 to the red positive output wire from
the voltage booster unit.
10. Using the remaining butt connector, connect the blue wire from relay 2 to the black ground wire from the
voltage booster unit.
11. Terminate the black ground wire from relay 1 with the supplied 3/8” ring terminal. Connect the ring terminal
to a chassis ground.
12. Route the white wire on relay 2 through the passenger compartment to the toggle switch. Using the supplied
splice connector, splice this wire in line with the “On Acc.” wire coming from the toggle switch.
13. Connect the orange 12 volt power wire from the Voltage Booster Unit to the battery.
Pictured to the left is the Ford factory fuel pump wire harness. This fuel pump wire
harness is located under the carpet in the trunk area just to the left of the spare tire
compartment. When installing the voltage booster relay harnesses, pay careful
attention not to intercept the wrong wires or your Edelbrock Performer nitrous system
will not work properly.
Testing Voltage Booster Before Running
Follow the following steps to ensure that the Voltage Booster Unit is properly installed on you vehicle. Failure to
follow these simple steps could result in catastrophic engine damage.
1. Before turning toggle switch to the “on” position, check all connections for good contacts between the terminals.
2. Be sure that the orange fused wire for the 12 volt supply from the battery to the voltage booster unit is connected
to the battery.
3. Turn ignition key into the “on” position without starting the vehicle.
4. Turn the toggle switch into the “on” position. You should immediately hear the fuel pump begin to make a midranged whining sound. If the fuel pump does make this sound, go to step 5, otherwise follow the troubleshooting
steps below:
a. Check that the orange fused wire to the voltage booster unit is connected to the +12v terminal of the vehicles
b. Check to be sure the black ground wire from the voltage booster is grounded to the battery.
c. Check all connections to the wires from the voltage booster and be sure that they are all connected with no
frayed wires.
d. Cross-reference the relay wiring with the wiring schematics on page 18 to be sure that all connections are
made to their proper places.
e. Be sure that the black ground wire from relay 1 is connected to a good chassis ground.
f. Make sure the appropriate wires are intercepted in the Ford fuel pump wire harness. If the incorrect wires are
spliced into, the voltage booster will not work properly.
Before You Run Your Vehicle Using Your Edelbrock Nitrous System
You have just completed the installation of your Edelbrock Nitrous System. It is time to perform some basic system checks
to ensure all of the work you have done is correct and ready to operate properly. The following procedure is designed to
validate the operation of your nitrous system before operating your vehicle:
Note: Before performing steps 1 through 4, make sure that the nitrous bottle is closed and main nitrous supply
line is empty of any nitrous.
Fuel System Check
Hook up all battery leads.
Double-check all wires and leads for signs of heat and proper connections.
Start your vehicle.
Check all fittings for leaks.
Switch master arming switch to the “on” position (switch should now glow red). Make sure the nitrous
bottle is closed and the main feed line are completely empty of ANY nitrous! Raise the engine speed
to above 2000 RPM. Briefly depress the activation arm on the microswitch, which will open the nitrous
solenoids and activate the voltage booster unit. Listen for a loud click or hold the solenoids while you activate
the microswitch. The engine speed will decrease if the voltage booster unit and delivery system are performing
properly. If not, refer to the “TroubleShooting Guide” located in the back of this manual.
Nitrous System Check
With the vehicle's engine running, slowly open nitrous bottle valve.
Note: There should be no change in engine idle speed. If idle speed changes, close nitrous bottle valve
immediately and refer to the "Troubleshooting Guide" section.
Inspect nitrous lines and fittings for leaks using a soapy water mixture and a small brush.
If any of the fittings/connections show bubbling around the attachment nut or on the threaded area of the
fitting, shut the nitrous bottle valve off immediately and dry the fitting before attempting any service to that
particular fitting connection.
If the engine idle does not come up, and all of the fittings appear to be leak-free, you have successfully
completed the installation of you Edelbrock Nitrous System.
Solenoid Inspection and Maintenance
1. Close valve on nitrous bottle.
2. Make sure all nitrous supply lines are free of pressure before removal of any system solenoid.
a. Empty main nitrous supply line at the nitrous bottle. Take care to not breathe or expose your skin to nitrous.
b. Do not open pressurized fuel lines over a hot engine.
3. Remove nitrous solenoid from the engine and securely clamp it into a vise, taking great care not to damage the solenoid.
4. Remove the solenoid cover, retaining nut from top of the nitrous solenoid.
5. Remove coil and housing from nitrous solenoid base.
6. Unscrew stem from nitrous solenoid base. Do this by using a solenoid stem removal tool or by “double nutting” the stem
and unscrewing the stem from the housing body. Do not use pliers on solenoid stem; damage to the stem will result.
7. Carefully remove the stem, spring and plunger from the solenoid base paying close attention to the way they are
8. Examine the plunger seal for swelling, cuts and abrasions. The seal surface should be flat, except for a small circular
indentation in the center of the seal.
A seal that has been contaminated or over-pressurized will bulge from exposure to chemicals other than nitrous
oxide. It can appear to extend down from the plunger and be dome-shaped. A contaminated seal may return to its
original shape if left out in fresh air for approximately 48 hours. It may then be returned to service. If it does not return
to its original shape, it must be replaced.
9. Clean the solenoid body. Do not use an oil-based solvent to clean any part of the solenoid. Use paint thinner
or electrical contact cleaner. Remove any contaminants that may be present. Make sure solenoid body is clean, dry
and free of oils before assembly.
10. Replace the O-Ring, plunger and piston spring.
11. Re-assemble solenoid by reversing disassembly procedure.
Troubleshooting Your Edelbrock Nitrous System
How to use our Troubleshooting Flowchart:
The troubleshooting of a nitrous system is basic and straightforward. The symptom chart is divided by symptom, cause and action
required. Determine your problem (symptom), identify the potential problem (cause) and correct the problem (action required).
Symptom #1… There is No change in engine speed when system is activated.
1. System wired incorrectly.
a. Compare wiring to schematic.
i. Wire per instructions. See “Nitrous Electrical System Wiring Diagram” section.
2. Restricted fuel line.
a. Inspect fuel line for restrictions.
i. Remove restrictions (kinks in rubber line, pieces of rubber hanging in flow path, etc.).
b. Check Fuel Pressure.
i. Increase fuel delivery as needed.
Symptom #2… Change in engine speed when nitrous bottle valve is opened.
1. Malfunctioning nitrous solenoid.
a. Repair/replace solenoid. See “7.0 Solenoid Inspection and Maintenance” section.
2. Contamination in nitrous solenoid.
a. Remove and inspect solenoid for dirt around seat area of plunger in solenoid.
Symptom #3… Engine runs excessively rich when system is activated.
1. Nitrous bottle valve not fully opened.
a. Check bottle valve.
i. Open valve fully.
2. Nitrous bottle mounted improperly.
a. Mount bottle properly. See “Nitrous Bottle Installation” section.
3. Plugged nitrous filter.
a. Clean and/or replace nitrous filter.
b. See nitrous solenoid symptom #2.
4. Low bottle pressure.
a. Weigh bottle.
i. Bottle should be 10 lbs. above empty bottle weight listed on bottle label when full.
b. Check bottle temperature.
i. Maintain 80 to 85 degrees of bottle surface temperature.
5. Voltage booster unit setting is too high.
a. Check clockwise - counterclockwise setting on potentiometer of voltage booster unit.
i. Adjust potentiometer to the correct setting recommended for the jetting being used.
Symptom #4… High RPM misfire when system is activated.
1. Excessive spark plug gap.
a. Inspect spark plugs.
i. Set plug gap at 0.030 – 0.035 inch.
ii. Contact the manufacturer of your plugs for more information.
2. Weak ignition/ignition component failure.
a. Inspect ignition components.
i. Replace worn components.
ii. Upgrade ignition system to high performance high load capable ignition components.
Symptom #5… No change in performance when system is activated.
1. System wired incorrectly.
a. Compare wiring to schematic.
i. Wire per instructions.
2. Loose ground wires.
a. Connect test light to battery “+” (positive) terminal. Check for continuity at grounds.
i. Tighten/repair loose grounds.
3. No power to arming switch.
a. With ignition on, connect test light to battery “–” (negative) terminal. Check for power at pole #1
on arming switch.
i. Repair wiring.
4. Malfunctioning arming switch.
a. With ignition on, turn arming switch on. Connect test light to battery “–” (negative) terminal.
Check for power at red wire on arming switch.
i. Replace arming switch.
5. Malfunctioning microswitch.
a. Turn arming toggle off. Close throttle microswitch, check for continuity between microswitch
wiring terminals.
i. Replace microswitch.
6. Inadequate nitrous supply.
a. Weigh bottle.
i. Bottle should be 10 lbs. above empty bottle weight listed on bottle label when full.
b. Check bottle temperature.
i. Maintain 80 to 85 degrees of bottle surface temperature.
c. Check bottle valve.
i. Open valve fully.
d. Check bottle orientation.
i. Mount bottle properly.
7. Mismatched nitrous/fuel jetting
a. Compare jetting to recommended values.
i. Install correct jets
b. Verify the number stamped in the jet match the desired power level.
i. Acquire the right size jets and install correct jets.
8. Excessive fuel pressure.
a. Perform Fuel Pressure Test Procedure.
b. Install fuel pressure gauge.
i. Regulate pressure to proper settings.
9. Loose nitrous solenoid wiring.
a. Inspect solenoid wiring. See “3.0 Electrical System Installation” section.
b. Consult a book concerning proper wiring methods.
10. Malfunctioning nitrous solenoid.
a. Inspect solenoid wiring. See “3.0 Electrical System Installation” section.
i. Repair wiring.
b. Inspect solenoid. See symptom #2.
i. Rebuild/replace solenoid.
Symptom #6… Engine detonates mildly when system is activated.
1. Inadequate octane fuel.
a. Verify what gasoline you use.
i. Use higher-octane fuel.
2. Spark plug heat range too high.
a. Verify what heat range the spark plug is, and how it functions in a high load, high performance
i. Install a performance spark plug.
ii. Reduce spark plug heat range.
3. Too much nitrous flow.
a. Verify the size of the nitrous jet.
i. Install the proper nitrous jet.
b. Check bottle temperature and pressure.
i. Ensure before every nitrous usage that you only use nitrous when the temperature and pressure of your bottle
are correct.
Symptom #7… Engine detonates heavily when system is activated.
Inadequate fuel delivery due to:
1. Plugged fuel filter.
a. Inspect fuel filter.
i. Clean or replace filter.
2. Crimped fuel line.
a. Inspect fuel line.
i. Replace crimped line.
3. Weak or inadequate fuel pump.
a. Install fuel pressure gauge. Run engine under load at wide-open throttle, with system activated.
i. Repair or replace fuel pump.
ii. Install nitrous dedicated fuel supply.
4. Improper potentiometer setting on Voltage Booster Unit.
a. Check the clockwise - counterclockwise setting on the potentiometer setting.
i. Adjust the potentiometer to the correct setting for the jetting installed.
Symptom #8… Vehicle surges under acceleration when system is activated.
1. Inadequate nitrous supply.
a. Weigh bottle.
i. Bottle should be 10 lbs. above empty bottle weight listed on bottle label when full.
b. Check bottle temperature.
i. Maintain 80 to 85 degrees of bottle surface temperature.
c. Check bottle valve.
i. Open valve fully
d. Check bottle orientation.
i. Mount bottle properly.