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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Find a C2T turbo digram some where.

The Compressor By Pass Valve dose exactly that. It bypasses air around the compressor wheel. It takes compressed air off the inter-cooler and circulates it back to the intake, after the metering plate, and before the turbo.

If you vent air from any area after the metering valve to atmosphere the injection system will be supplying fuel for the full amount of the air flowing through it.

CIS is not like efi where it can shut down fuel flow.

You could vent the air but what would happen is there would be extra fuel that might turn the exhaust turbine into a jet engine.

That is good for turbo lag but hard on the turbo. Some of the factory CIS race cars did this trick.
Old 12-04-2008, 06:40 PM
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