I've been playing with the LPG install tonight trying to fine tune it. This is the first decent session I've had with the laptop.
First observation was that the multipliers were unusually high following autocalibration, and every time I pushed the engine past 4k revs it would flag a fault that the injectors were fully open.
I gave the car some beans and the lambda was reading 0v at WOT, meaning it's running lean. Can't carry on like that - could hole a piston.
Sooo.. decide the nozzles need to go out a bit bigger. When I first converted I drilled them to 2mm, so I took them out to 2.5mm. Doesn't seem a lot but when you compare the difference by eye it's a fair bit and you'll get a lot more volume of gas through there.
Also decided to up the pressure, I've taken it from about 0.79 to 1.09.
After these two tweaks I calibrated again, and went for a drive. I instantly noticed a big increase in performance. I can now rev to the redline before it warns about the injectors being fully open, and when I gave it a good spanking in all the gears joining a motorway (redline in 3rd
) it logged a consistent 4.5 volts on the lambda - so it's no longer lean.
Mapping was pretty close, I tweaked this a bit.
Seems to run really nicely now - tomorrow will be the acid test
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Topic: Been doing some LPG tweaking :) (Read 919 times)