I've been running E85 in my RB25 for almost 3 years now. Never had any issues. Made 477 at the wheels with the following setup.
Walbro
RC 750cc
JGY Top Feed
3076R
FReddy Intake Manifold
Q45 TB
Pump E85
MAP ECU
Dropped the boost down and sitting happy now at 410 because I didn't trust the boost levels I was running for 477 on a 17 year old motor.
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