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Registered
Join Date: Aug 2006
Location: Cincinnati, Ohio
Posts: 1,019
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Good observations on the fuel economy. I'm hoping I can still get the 20-22 on daily drive...that is darn near what my 5 jug S4 gets back and forth to work (I tap into the boost a lot though). This is the true bueaty of the turbo, there is nearly zero penalty when cruising, even at high RPMs and low loads. It sits quietly in the background until you drop your foot and call for it. Your docile, well mannered 928 then becomes a real blast of a ride. With the way my 4.5 and 4.7 builds have turned out and knowing this car has so much more potential....let's just say I have high expectations out of it.
Regarding weight...I have not actually weiughed all the bits up, but I'm sure total there is some weight added. However, this is nothing 0.2 psi won't take care of in a hurry.  Induction plumbing could be made of aluminum to shave weight. I don't think the additional is enough to mess up the balance of the car though.
In the case of my dog's stainless rear end, it was a shattered leg between the knee and the hip. The biggest piece was just one inch long...the rest was shattered. He got an erector set plate and was back in business after 6 weeks!
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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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