That's a fricking bummer stupid az voted down weed now this, **** man sucks I gained 27 hp using e85 b4 I'm just intake and exhaust. I threw a GT350 Manifold on and getting it dyno tune today and I was like I got e85 in the trunk and he was like no its e54 now I'm like damn it I was hoping for some sexy gains well still be better than 91 I'm thinking but who knows.
I only lost 2 degrees of timing going from E85 to E54, you shouldn't lose more than 10whp and it's safer than 91