Quote Originally Posted by Turbocharged400sbc View Post
knock sensors are peizoelectric crystals tuned to a certain frequency range of noise related to detonation.

fuel isnt gonna change its sensitivity, only the amount of thread sealant and the sensor tq value do that (NA kr sensors are tq'd higher than L67...aka more sensitive)

your more likely to loose KR sensor effectiveness if you change the piston/chamber design/volume as they are the primary relation to the frequency at which the detonation "pings"

if any of you have heard true spark knock on like an old chevy...you can tell thats one hell of a high frequency sound that shouldnt be there...the kr sensor picks up on em far sooner than we can listen to em.

the higher octane rating of the e85 is the bee's knee's nut even it didnt reduce KR on one local top swapped car...after years of work and changing parts (even swapped out the whole damn engine...nope) ...we changed out the PCM and all the KR went away (down to reasonable levels for 93oct and nothing with a switch to e85)

as you can see...many things can affect your kr
Think e85 detonates in a different frequency? I see lots of motors that either blow head gaskets or chip a piston/spin a bearing with getting even a blip of kr. But, I can't say I've ever really seen that on 110 or c16. Maybe it's just my imagination. But, I do run it when it's warm, after all, I grow the stuff.