Hey guys, what is the best afr to run at wot on a turbo car. I read and found mix answers on people saying stick to 12-12.5 and others say in the 11s. What do you guys recommend and what should a good afr for cruising?

 

Read this. It's specific to Crome but then tuning aspects are solid on any platform.
http://www.gravityimports.com/CROME_v1.6.x_Manual.pdf

 

I tune fuel the same on e85 as I do with gas. I think you will find that the stoichmetric difference doesn't share the same percentage change once you actually apply the tune. from pump gas to e85, my last turbo setup only needed 10% more fuel. cold starts were a bit different but other than that, there was not too much change beside a very large increase in power output.

the afr really depends on how "hot" the engine is. I ran at ~12:1 for pump (380whp) and e85 (450whp)

 

Most Widebands don't require special programming.
Target the same afr target number regardless of Fuel type.

I once long ago made the mistake of running e98 and targeting an Idle number on my AEM Wideband of 9.3afr

a required number and a wideband readout are usually two separate things entirely.

You'll find you will run a higher duty cycle on Alcohol vs Petrol. Your Engine will typically want your wideband number about the same everywhere however.