Originally Posted by Merlosso
I'm assuming your extensive testing has been done on 91 octane gas being that you're in CA. Do you have a tune for 93 and if so, how was it tested?
Testing has been performed on 91, 93, 94, and 100 octane. If there are cars running higher than 100 octane, this can be done as well - but make sure to use unleaded fuel only.
Higher octane means that slightly more ignition timing can be run, while remaining at safe levels. I'm pretty conservative with my timing targets which keeps you and your engine happy. I'm always happier to tune 93+ octane cars as it only leaves more room for improvement.
yinlee: Can't PM you as you only have 2 posts so far. I think you have to have five. Feel free to shoot me an email as well. Thanks!