I have 410 gears Steeda underdrive pullies. My question is I am currently using the performace tune and as i've read on this site i'm not the only one thats unhappy with it. I am using 93 octaine and want to change to the 91 octaine tune will this work well using 93 octaine or should I change to 91 before I reflash to use the 91 octaine tune?
I heard of the problems with the 93 tune. I used the 91 tune and increased the global timing 1 degree. I also increased the 2000-4000 timing 2%. I now run 93 octane with no problems.
