Remapping the WOT fuel delivery with my piggyback ECU.
04-10-2017, 11:54 AM
#1
Remapping the WOT fuel delivery with my piggyback ECU.
And the interesting part is that the car runs on LPG.
When we open the throttle to 100%, aka WOT, fuel trims are completely ignored (both STFT and LTFT drop to 0% and remain unchanged). Additionally, the car runs with an AFR ratio of 1:10. The benefit of overinjecting is that the excess petrol is functioning as a cooling agent, increasing the power output of the engine.
When the car runs on LPG, injecting excess fuel is absolutely pointless, since gas doesn't have the cooling properties that a liquid has.
So for this very reason, I want to map my LPG system to run 1:15 at WOT on any RPM range, or atleast close to 1:14 to stay safe. If anything, that should increase the power output. There was one guy who has done this to his RX on LPG and he said that it ran crisper on WOT.
What is your take on it? How should I approach this?
When we open the throttle to 100%, aka WOT, fuel trims are completely ignored (both STFT and LTFT drop to 0% and remain unchanged). Additionally, the car runs with an AFR ratio of 1:10. The benefit of overinjecting is that the excess petrol is functioning as a cooling agent, increasing the power output of the engine.
When the car runs on LPG, injecting excess fuel is absolutely pointless, since gas doesn't have the cooling properties that a liquid has.
So for this very reason, I want to map my LPG system to run 1:15 at WOT on any RPM range, or atleast close to 1:14 to stay safe. If anything, that should increase the power output. There was one guy who has done this to his RX on LPG and he said that it ran crisper on WOT.
What is your take on it? How should I approach this?
