Look into getting the diablosport Predator. It will allow you to adjust for the gears plus bump timing and help you get alittle more HP. I am very surprised you did not beat him. My stock 01 Cobra pulled on a 2000 Supercharged Saleen S-281. As far as when to shift your best bet is to get your car dynoed and then look at the graph and decide. Mine is around 6500 rpms for best shifting.
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2003 Sonic Blue Cobra
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