Originally Posted by
06300CSRT8
I purchased a knock box and it was EXTREMELY helpful, strongly suggest you stop "knocking" (pun intended) on using one. Stock knock sensors were reporting high voltages, knock box with headphones I heard ZERO sounds of knock, none. and yes, I did get to a point where i did hear knock through the headphones, and was very easy to hear. So yea, they work, and are useful.
Your advice, which I am sure is based on years of experience, is still just a "IT CANT BE KNOCKING BASED ON MATH" assumption. I made the same assumption but then went ahead and actually listened to the motor to verify that assumption was right. I think that is a better approach.
And since when does ethanol make seeing knock evidence on the plugs more difficult? flakes of pistons are flakes of pistons, regardless of fuel type. if anything this is the ONLY way to find knock with ethanol as it has such a high burn rate often stock or close to stock settings for knock sensors will never actually hear the detonation or pre-ignition as the flame front timing is much different than gasoline, need a different crank timing window and highly sensitive threshold.