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Take into consideration that he is making over 600 hp at the motor. So figure from there and take away some for the gear and see what you come up with.
Sorry I don't see how that motor is making 600hp. Not at 8 psi of boost anyway. If that were the case a person could boost a 400hp mild BB and make 700... That combo w/o boost might make 375 so I'll add 100 for the boost. For 11's he'll need 425 at the rear wheels so figure 510+ at the crank. He has to much converter and not enough gear.
375HP N/A
8# of boost is basically 55% of an atmosphere, 61% if at 9 pounds. We'll take the lower of the 2.
375*1.55 = 581hp theoretically. You said he only needs 510?
Keep in mind this a turbo car, not a super charged car, once its spooled, it's at max boost, gears don't mean much, it actually helps to create a load and spool the turbo faster. He has a brake, and should be launching with boost already built. Its a fairly decent sized turbo, and will move a good amount of air. Now if it was a tiny turbo at 8#, it wouldn't move as much air, and wouldn't make as much power. Thats why the above formula is simply a rule of thumb.
-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
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