Figuring out A/f for PE

[600+duramax]

I am trying to figure out the value I want for my a/f in pe. I am running e85 and I'm using a 9.77 for stoich. When I divide 9.77/11.0af=1.13 pe. Is this correct? Something doesn't seem right.

[HartsG8GT]

Guys I know are running around 7.7 at WOT with E85. 9.77/7.7=1.268 PE EQ ratio. That would be a good starting point but you really wanna get it on a dyno to figure out if richer or leaner will net more power. Hope this helps.

[600+duramax]

Guys I know are running around 7.7 at WOT with E85. 9.77/7.7=1.268 PE EQ ratio. That would be a good starting point but you really wanna get it on a dyno to figure out if richer or leaner will net more power. Hope this helps.

Thanks that helped. I was still using the gas scale for my calculation. 11.0 should be 7.32. That would give me a 1.33 pe value.

[MikeOD]

1.33 in PE is a LOT of fuel...what's done to the engine?

[600+duramax]

1.33 in PE is a LOT of fuel...what's done to the engine?

A whole lot of everyhthing. Trying to target 11.0 A/f with e85. Makes about 900 hp.

[MikeOD]

Yeah, then 1.33 is going to target the same lambda on E85 that 11.0 would equate to on pump gas...but remember that E85 is a higher octane, so you may find less fuel to be better.

[600+duramax]

Yeah, then 1.33 is going to target the same lambda on E85 that 11.0 would equate to on pump gas...but remember that E85 is a higher octane, so you may find less fuel to be better.

I agree I am just targeting 11.0 because my wb sensor is closer up stream than the tail pipe. I am just gonna start there.