i would say advance the ignition timing 8-10 degrees, you have to run 91+ octane when you do this. you can do more, but it starts to get risky on shity ass pump gas, i think that you can advance up too 15 degrees, but i personally wouldn't. i've had mine that advanced, but i was running on 91+7 point octane booster, that got expensive, hauled ass tho!