Knock Retard / U1794 06 Vette

[edv2122]

How much knock retard is acceptable? Or should k/r be at "0" under all circumstances?

I was doing some loggin with the handheld and I was playing around with spark advance I upped the advance from the 93 octane Diablo Tune to 1, 2, and 3 advanced. At 2 degree advance my car felt super strong but I was seeing some kr up to 2 degrees. When I backed it down to 1 and 0 degrees the car did not feel as strong as it did at 2 degree advanced. Can anyone help me out with some k/r schooling?

FWIW last tank was 93 octane Sunoco fuel. Just filled up with Ammco BP gas 93 octance but I noticed at the last second that they had a big sticker saying up tp 10% ethanol. Any thoughts?

[06MonteSS]

at WOT, we want to have 0 KR. at normal driving/cruise, I've heard/read that anything 2* or less is ok...

and keep in mind, that bogging the engine (at a low rpm in a high gear) will cause KR no matter what.