the legend of the NA KA....

[BigVinnie]

Originally Posted by 90RS13

You just said exhaust, header, and tuning....you never metioned he was using 104 octane fuel. You can tune timing alot more aggressively with 104.

104octane will shift the timing a bit, but by the smallest margin (probably a couple donkey's). I don't think it is the performance enhancer that you think it is to be. The purpose of higher octane fuels is to prevent knock and ping, (actually lowering the knock signal a bit). Shure it freed up a little room as far as timing, but then again that is mostly the ecu tune, and when I mean by the smallest margin probably like 5HP at the most was gained using that fuel.