Thread: 928S4 Twin Turbo Final Design and Results
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Herr-Kuhn Herr-Kuhn is offline
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Join Date: Aug 2006
Location: Cincinnati, Ohio
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928S4 Twin Turbo Final Design and Results
I figured some people over here might want to see the results of the latest 928S4 Twin Turbo system. This engine is built with Carrillo rods, Mahle pistons, Nikasil plated block, Elgin 65-6 reground S3 cams, PAS 1223L Beehive springs, Siemens 80 lbm/hr injectors, stock Bosch LH2.3 and EZK ECUs, Garrett GTX3576R turbos with 45mm Turbosmart remote wastegates. The engine produces over 900 flywheel HP on 93 octane pump gasoline with 21 psig manifold pressure.








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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.
Old 11-12-2020, 04:01 PM
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