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S4 Not Producing boost over 60 KPA HELP! - Page 6 - Induction/Turbo/Chargecooler/Manifold/Exhaust - The Lotus Forums Jump to content

S4 Not Producing boost over 60 KPA HELP!

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Here is the WC housing which was causing the performance issues.

Comparing both WC housing and the factory one the diffrence of the inside diameter was close to 4mm.

Sorry I cant provide anyone with the factory housing photos since this is now on the car.

I have also noticed the bad edges on ther inside of the wall sticking out, I was expecting the inside wall to be as smoth as possible to improve air flow. This is a quality product issue...

I suppose the car now should produce close to 270 BHP since on the dyno the MAT sensor went up to 66 decrease which robs power from the engine.


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