What should the AFR be under boost on E85? I know for pump it can't fall under 11.

 

Stoich for E85 is 9.76

 

its really depends on what "afr" you are going by. as stated above if you set the wideband for E85 aim for 9.76

now from the searching that i have done. using GAS AFR's i would aim for:
Idle to = 14.7-15.2
Cruise to = 15.5-16.5
WOT Spool up to full boost to = 11.5-12.0

 

Nice thanks guys

 

WBO2 with a Gas Calibration. 12.5:1 Under peak, tapering to 12'ish to help cool under high rpm.

personally....thats what I go with.

 

my motor likes it to be right at 12.2 for wot. its really weird how it acts if i go any richer.