[s346k]

i have the same experience as king. i sat in my bolt on e85 car for 15 minutes letting it idle on a hot and humid day. iats were 115+, coolant temp hovering around 200. stock tstat & 27*. went from idle to a 1-4 pull and it had 0 knock. e75 ish.

i don't know that i've ever seen the car knock on ethanol. it had a touch more timing in it (28-28.5) with the stock intake manifold, tb & air box, but same results.