What are the odds my ethanol heavy fuel runs a little lean?

[BastardS4]

Been thinking of a few things.

My car ran a much healthier AFR and lower knock when i had a tear in my TBB.

Once i fixed it, the car was leaner at WOT and had a heck of a lot more knock.

I think it was pretty much staying in the low 12s when it should have been dipping down into the 11s sooner.


What would your typical secondary (multiplicative) fuel trim addition need to be like to add a half point of AFR up top? (on 630cc injectors)

Fuel starvation is not the issue, 044 fuel pump is more than capable to meet the demands.

im running the sunnoco 94 octane ethanol junk. Yes its 94, but its crap in my opinion.

[JMTx86]

Just slowly add fuel till your afr is better and it doesn't knock. Your asking technical information on the wrong forum.

[BastardS4]

Someone must have a rough idea of starting percentages?

[JMTx86]

Try audiworld.