hmmm ive been running 93 octane stock.... i shouldnt be??? i thought it was better refined and ran cleaner.. also my dads truck gets a consistant 13.4 on 89 and a constant 14.4 on 93, so i dont see how we can loose gas mileage.

Paul

 

Thanks Teacherman! Yeah I am definetly a proud Mustang owner, I've washed my car three times this week, hah, and installed Redline Hydraulic Hoodstruts, Oh man drilling those holes underneath my hood scared the crap out of me, but it all turned out well.

Anyways i'm still looking for a Mustang Dyno in Huntington Beach, CA that doesn't run 'Privately'. Damn them!

How much does a Dyno cost normally?

 

If you don't advance the timing at all, then you are not igniting the air/fuel mixture soon enough, and there is not enough time for the 93 octane fuel to fully combust and create more power. You are just exhausting a bunch of unburned fuel when your exhaust valves open up. Just run 87.