Originally Posted by
gpr
One more question unrelated question looking over my tune, at some point I put B3601 Ratio of Air to Fuel for Stoichiometry to 10 (this is the lowest limit even though e85 stoich is 9.7). I believe before I always had it set to 14.7, as the wide band was working on a gas scale anyway. Once I enable stft at idle, is this going to make it run extremely rich?
I run mine at 10.0. If you don't, your air model is going to be WAY off. Use 14.7 for E0 14.6 for E10. 10 for E85. It will make your air models a lot closer to what they should be.
No! It won't be too rich. They will add fuel to get the correct heat signature.
Is AFR really used by the pcm? or does it base everything off lambda and eq ratio? Lambda and AFR are the same thing. You can tune in AFR with E85 and you'll look for a 12.5:1 (for example) just like you would with Gasoline.
Lambda is just easier because the math is a LOT easier in your head for quick adjustments and covers ALL fuels.
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