PAGE F5 MAP
It is possible to modify the gas mixture in this page, adjusting the map created by the automatic calibration procedure.
Changing the map is not mandatory: we recommend to check the mixture and modify the map only if necessary.
You can check if the engine is correctly carbureated while on gas using a diagnostic tool capable of reading the petrol ECU fuel trims (for example you can use an OBD-II scan
Petrol injection timings
tool on OBD-II equipped cars): simply check the fuel trims at different revs. You can check the carbureation also without a scan-tool, checking the strobing of the lambda signal while switching form petrol to gas and viceversa. You can still make some test, even if the lambda probe is not connected to the gas
ECU: just compare the petrol injection timings while on petrol and while on gas, switching from petrol to gas and vice-versa.
K ratio for given petrol injection time and engine’s rev
Engine’s revs
You should check that the K figures in the map change smoothly from one cell to the other; eventually modify the map to achieve a smoother map.
If you need to modify a figure of the map, select its cell and double-click the left mouse button on it, or press ENTER on the keyboard.
You can select also a whole area of the map and press ENTER to change all the figures in the selected cells at the same time.
There are three way of modifying the figures:
• Absolute: changes the selected figures into the new value you enter.
• Linear: sum/subtract the value you enter to the selected figures.
• Percentage: increase or decrease the figures in the cell/cells by the percentage you enter.
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PAGE F5 MAP
SWITCH FROM PC
With this button you can switch to petrol or to gas without using the switch inside the car (when you select the Switch from PC button, the switch inside the car is momentary disabled).
MODIFY MAP REFS
The value of the first time line should be checked at idle (with all loads off, like A/C, head lamps, etc.), while on petrol. Take a value lower or equal to the petrol injection time you read in the parameters panel, on the bottom of the window.
Fill the 12th time line with the same procedure
(take the max petrol injection timing while driving the car at the highest revs).
The values in the time lines should increase smoothly in the first 5-6 rows, while the other values should increase proportionally till the
12th line.
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PAGE F6 ADJUSTMENTS
REDUCER TEMPERATURE
CORRECTIONS
You can change the temperatures and the correction percentages. You should modify the temperatures only if the reducer tempetrature for change-over is lower than the figures in the correction table.
You should change the correction percentages only if you think that the mixture is too rich at a specific temperature.
GAS TEMPERATURE CORRECTIONS
This table lets you compensate the variation of the gas density over temperature.
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