E85 ethanol conversion update?

[SpeedEuphoria]

Quote: Originally Posted by seltech

I did see where he mentioned afrs for max lean power was around 8.5:1 and rich max power was 6.5:1, unfortunatly my AEM uego is older an only reads to 11. I've heard they can be switched to display in lambda which would be what you'd want to look at it in. or i think widebands can be calibrated with the fuels stoich ratio. Not too sure though.

That is based on a stoich of 9-10:1 A/F(it depends who you ask and prob because of the different amount of gasoline in winter and summer mixes), so if you have a gasoline calibrated wideband you just need to convert it . All widebands read Lambda, and Stoich of all fuels is Lambda 1, so the A/F is just a multiplier.

So given your info its hard to tell really what A/F value they use. If you figure 10:1 stoich that some use then it would mean for a gasoline calibrated sensor, using E85 you would tune it to: max lean power(8.5/10=.85x14.7)~12.5A/F and rich max power would be (6.5/10=.65x14.7)~9.5A/F. Hence the reason for E85, you can be much richer than gasoline and still make good power. This is much safer and why I said earlier that figure on 40%more fuel for WOT because you will be much safer then you ever have been on gasoline while still making great power.

[seltech]

Quote: Originally Posted by SpeedEuphoria

That is based on a stoich of 9-10:1 A/F(it depends who you ask and prob because of the different amount of gasoline in winter and summer mixes), so if you have a gasoline calibrated wideband you just need to convert it . All widebands read Lambda, and Stoich of all fuels is Lambda 1, so the A/F is just a multiplier.

So given your info its hard to tell really what A/F value they use. If you figure 10:1 stoich that some use then it would mean for a gasoline calibrated sensor, using E85 you would tune it to: max lean power(8.5/10=.85x14.7)~12.5A/F and rich max power would be (6.5/10=.65x14.7)~9.5A/F. Hence the reason for E85, you can be much richer than gasoline and still make good power. This is much safer and why I said earlier that figure on 40%more fuel for WOT because you will be much safer then you ever have been on gasoline while still making great power.

Thanks for that info

[What Neon?]

This may not be worth much, but I have tried some E85 experiments myself. I am running S3 with alot of bolt ons. I tried 4 gallons 92, 4 gallons E85 and it never kicked me out of HOM. The next tank went back to all 92. Next tank after that was 3 gallons E85 to 5 gallons 92 and it still did not kick me out of HOM. I do not have a Knock gauge yet (i know it is bad to not have one) so I can't tell you the difference there. my.02

[j2fast]

Quote: Originally Posted by What Neon?

This may not be worth much, but I have tried some E85 experiments myself. I am running S3 with alot of bolt ons. I tried 4 gallons 92, 4 gallons E85 and it never kicked me out of HOM. The next tank went back to all 92. Next tank after that was 3 gallons E85 to 5 gallons 92 and it still did not kick me out of HOM. I do not have a Knock gauge yet (i know it is bad to not have one) so I can't tell you the difference there. my.02

e85 is hard to knock, you will burn your motor b4 it will knock

[FraziersSRT]

Any updates?There are a couple of EVO's running around south florida with E85 that are taking out alot of cars...im very interested in this topic! Subscribed.



-Frazier