Estimating fuel injector, carburetor and fuel pump requirements
Fuel injector, carburetor jet sizing, and fuel pump requirements can be estimated by using the following rules of thumb as a starting point. For a naturally aspirated (NA) engine (carbureted) on gasoline most need a brake specific fuel consumption (BSFC) for gasoline of 0.50 lb/(hp·h). On E85 the same NA engine would need a BSFC of about 0.65 lb/(hp·h).
Turbocharged engines typically need BSFC fueling of about 0.60 lb/(hp·h), a reasonable first guess for fueling required on E85 would be 0.77 lb/(hp·h).
For a simple conversion to replace gasoline with E85 take the current "flywheel horsepower" as a reference point. With E85, power should increase by about 5%, so the estimated E85 fueling would be:
(BHPgasoline x 1.05) x BSFCe85 = Estimated E85 fuel requirements.
Say you are shooting for 300 wheel hp
stock fuel pump is ok 36lbs injectors
You need to add 46% more fuel to your tune
I would also set base time to 15 BTDC
My issue is turbo cars use more fuel and I do not know how much fuel to add. I know BSFC will be higher but how much? The math for E85 is below
(14.7 / 9.7) * (Engine HP * BSFC) / (Number of Injectors * (Injector duty cycle*100))
The dyno shop I got to may be able to help. They have a 750+rwhp turbo Talon that they've tuned for E85, and they've tuned a few other E85 cars. I don't know how willing they would be to give out any information, but it's worth a shot.
Their name is Rev Hard Inc. 877-RHI-DYNO. Trent or John are the guys you need to talk to. Trent's the owner of the Talon.