<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by PhilD:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by KenP:
You should not need 91 unless you have a "hot" setup with a programmer or a Super Charger. </div></BLOCKQUOTE>Ken, I have a question about this actually. What is programmer doing to get more power? I'm guessing it advances the timing and changes the air/fuel ratio, but not really sure.
I've used mine on 91 Octane Performance running 87 gas and didn't have pre-ignition even under hard acceleration. I still run the 87 Octane Performance program though as it does the job just fine for me. </div></BLOCKQUOTE>Timing, air/fuel and shift points are the main ones. Sometimes people won't get pre-ignition until the upper RPM range of each gear. Or a pinging at the shift. It sounds as if most programmers just give you choices. When I say "hot setup" I mean actually going into the programming and tweaking each point individually. I don't know if you can do that with "everyday" programmers. I think this is what Taz is looking into with the Nelson.