I have a question for you don. When you put that 91 in, did you go straight to the track?? Because if you put in it then maybe your car didnt even have time to adjust for it. I would say use 91 for a while and drive around with it and let the pcm adjust for it. Then do a scanand see if anything is changed. Also get a heatsheild on that filter, i know that hot air is probably cuasing atleast a degree of KR. As for running that warm, are you sure it is a 180 degree t-stat?? With my stock in i barely ran that warm, with the 180 in the highest i have ever seen was 200 and that was sitting in line at the track waiting for a longggg time.

tj i still have the stock 195 in it .will install a drill 180 this week

ohh lol, i see. Well that is going to help you quite nicely. Heat isyour worst enemy at the track. With a nice drilled 180, your temps will be much lower and that will help more then you think

one more question about my aeroforce i have as much as 33 degrees advance timing sometimes is this possible

yea, that is just normal driving. But at WOT you will not see that high. What did you say your WOT timing advance was?

will check that today tj how much WOT timing are you getting whit youre 95

I dont have a scanner, but the others are seeming to get 19 Degrees in the 95'*. I would think you are getting between 24-26 with that regal.

Shouldn't adding premium fuel at least take away knock instantly though? Octane is a physical property of the fuel, and therefore when you bump the octane, it shouldn't pre-ignite - which was causing the KR. However, I think the PCM would still need time/miles to optimize timing.

That'* my semi-uneducated train of thought - someone else can do better.

I am not sure if it would take it away instantly. I would imagine maybe but i am not sure if the pcm would have to learn it first.

well did a check and i got 25.5 max degrees at WOT can a L36 run whit more timing whit a reprograme pcm