Originally Posted by kiyoskia

I have a turbonetics boost controller on there right now, and I'm only boosting at 13 psi. I'm running 89 octane instead of 93, because at the moment I'm running rich, and I hope that running less octane will help lean my A/F mixture out (you know, less octane with the same amount of air), because right now I'm just spitting out unburnt fuel from my tailpipe.