I've experienced the same behavour with my 4g61t colt after switching to e85. If I'm crusing under 2k rpm on the highway with the logger and give it ANY throttle, the knock count goes ape****. It could just be phantom knock (something 1g ecus are famous for), but its just odd that we are both experiencing the same thing after switching.

I wonder if there's something more to this....

 

We haven't experienced any crazy knock on the 30 or so dyno pulls we made after I converted to e85. 3rd gear pulls on DD dyno and we were starting the pulls around 3,000 or less RPMs. Occasionaly on spoolup we would see 1-3 knock counts but that is somewhat normal or at least same situation back when I tuned on 92.

Still need more dyno time though, we ran out of time and gas when I was on the dyno last. Right now the car is tuned for 26psi, no more than 14 degrees of timing and 11:1 afr. This thing hasn't knocked once except for the occasional spoolup and again it was 1-3 knock counts at the most.

So far the shop has picked up over 100hp and over 110ftlbs of torque from a stock IX baseline. Car has ebay TBE, 255 pump, 1000cc injectors and a MBC. Ecu flash and stock air box with original air filter.

20mpg on the last 4 tanks of e85 gas. LTF trims are pulling ~5% fuel right now, probably could stand to be leaned out a bit.