Quote Originally Posted by BrandonHall10 View Post
I don't think so. I think it's all heat related. When I do a WOT run before the engine is fully warmed up, I see 0° throughout the RPM range. As soon as she gets hot, I see blips at the upper RPM range. Not much though. Before CAI and headers, I would see 4°+ degrees under at 2500 RPM during a hill climb (moderate load). IAT's were at or near 130°. It get's hot as balls here. I think if I had 93 vs 91 that couple degrees of knock would go away.

I suppose I am tuned so my timing is adjusted to kill knock, but I had no knock on hot days on a 3.8 pulley gen 3 top swap, no headers or anything. (usually you have to run slightly larger pulleys on top swap because of the higher compression. ) I think i'm only running 14* of timing tho