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Herr-Kuhn Herr-Kuhn is offline
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Join Date: Aug 2006
Location: Cincinnati, Ohio
Posts: 1,019
Twin Turbo Upgrades

I've been very busy this summer making some mods to the twin turbo system...more like finishing touches to it. My engine bay now looks pretty freshened up with the newly powder coated intake and plumbing. While I had the intake off, I fabricated an in-block air/oil seperation system and also installed the 2 other breather ports into the valve cover on the driver's side. I introduce purge air in on either side of the engine through the non-cupped breather port, then vent the air through the center port and as well the two additional valve cover ports. Then out to the Provent, so there are two air/oil seperators in the system. Thyanks to Louie Ott for the advice on the crankcase breathing methods.

The air snouts went through a mounting upgrade and now use a different fastening method to keep them fully secured down with zero movement. It took some time, but they turned out very nicely. I also added a serial number tag to the system and stamped mine as S-001. Serial numbers S-002 and S-003 are in production right now.

I'll be putting some videos up on youtube that cover an entire 928S4 twin turbo conversion...start to finish.










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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 07-26-2009, 04:22 AM
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