n_brio

My setup:
2005 m6
forged ls2 10:1
ecs baby blower cam whit supporting mods
ecs paxton sl1500 no restrictor 16 psi
e85
ecs stage 3 fuelsystem return style boost ref
id 1000 injectors
1 7/8 headers without cats
dpe 2.5 bar map sensor
running in 2 bar pure SD (E40)

what do you have for target lambda on e85?

Now im on 0,77 lambda all the way. and 17* timing

Pitufina

This may not be of any help to you, but I recall seeing 9:5 af ratio for E85 engines. I don't know what's the conversion.

TurboLX

If you are correctly adjusting for the change in fuel chemistry (stoich point), then you really don't need any significant change in target lambda. Part throttle and idle should still target 1.00 and your target of 0.77 at WOT is a fine starting point. You might elect to run a little leaner once it's all sorted, but it's not absolutely necessary. For a street driven setup, I would not likely go leaner than 0.82 target, with 0.79-0.80 being more probable. Quibbling about +/-2% fueling won't make much difference in power at this point as long as you have the proper spark advance for whatever final ratio you run.