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Registered
Join Date: Aug 2006
Location: Cincinnati, Ohio
Posts: 1,019
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Thanks for the feedback on the build.
The owner reported back yesterday saying that he was able to hit 90 MPH in 2nd gear with it hitting the rev limiter at 8,000 RPM. Mind you, I'm not saying that I endorse this type of behaviour 
The best thing about turbos is the Dr. Jeckyl/Mr. Hyde personality of the car. In cruise, it really is so docile that your grandmother could drive the car, assuming she can shift a manual with a slightly difficult clutch. On boost, it's a whole different animal. It's not a car for an inexperienced driver. My personal car makes 535 RWHP on the same dyno and it's fast, but not on the same plateau as this one.
This build isn't so much about 0-60 MPH, but more about 0-160 MPH. In the upper 1/3 of the engine's speed range the car is really incredibly fast.
The only real issue we've had with the car is keeping an A/C belt on the darned thing. Probably ultimately will need deeper pulley for the A/C pump and the stack.
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Kuhn Performance Technologies, LLC
Big Gun: 1988 928S4 Twin Turbo, 5-SPD/LSD 572 RWHP, 579 RW ft-lbs, 12 psig manifold pressure. Stock Internals, 93 octane.
Little Gun: 1981 928 Competition Package Twin Turbo, 375 RWHP, 415 RW ft-lbs, 10psig manifold pressure. Nikasil Block, JE2618 Pistons, 93 octane.
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