Quote:
Originally Posted by TruRace
@ steve99 mentions in his that that OFT uses fuel trims to compensate for the variations of %E so it is not recommend to rescale MAF. What does he mean by this?
@ Koa Thanks a bunch for all the help and info. My LTFT are still a bit high, but much better after the rescale. One thing Iv'e noticed is my AFR's on my OFT when I run E85 never reflect actual AFR's. It looks as though I am running petrol, and I know E85 runs much richer. Any idea why this is so? |
when your on e85 the e% varies with season and with different brands. We are lucky in oz as we have a pump e85 that is e85 guaranteed so it just as easy to scale maf on that e85 as petrol.
with your varing e85 you would need to scale maf on an average e% that you get maybe E70 or whatever in the middle of the range and effectively end up with a compromise maf scale then rely on fuel trims to sort out the variation. You would need to get an ethanol percentage test kit and test your fuel.