It's a K24 crank with custom rods and OEM pistons, knock sensor is failing, it always happens when you remove the transmission. I swapped the transmission after I did the clutch with the engine swap because the original transmission with 204k miles lost the 3rd gear synchro. So I must have damaged it during the install, it's common, just frustrated that I've been waiting on the knock sensor since the 10th of this month. I can't run corn syrup in my engine, injectors max out at 390cc but for corn I need 600cc injectors.
I am assuming it's part throttle pre ignion around the torque peek , the e85 will verify that is the case. Obviously can't do full throttle w it. But now that you said more info, we both know the results so unneeded.
Hondas have crazy compression. My real experience is tuning the big boys and keeping a 4.50 bore 12:1 alive on 91 pump gas.
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