octane depends on elevation and other things PKWRD has a good explination on this if you search it out.
on the coast i ran 103 octane and up a mile high in Calgary 89 doesnt detonate on me.
you can alway's run more boost when you want to cut racing gas in with the 93.
what is your bottom end like stock ?
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89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .
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