Quote:
Originally Posted by Juho
I'm running about 1.2 lambda without problems, but on E85.
It's quite difficult to get a stable 1.2 or 1.25 lambda, because injector pulse width maps are quite bad for optimizing air-to-fuel ratio without use of lambda sensor.. so it's around 1.15-1.22, would like to try leaner but then it'll start bogging when sudden throttle changes.
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Have you tried ~1.05-1.1 at low load, and 1.25 at medium load? I think at low load, you have a lot of residual exhaust gas diluting the mix, so it becomes quite sensitive and combustion variance goes up. At medium load, you have more oxygen to get faster combustion.
I recall trying to run 1.2 at idle on my old car and it would stumble a little when hitting the accel pedal. 1.15 was OK.