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Old 02-06-2022, 12:58 PM
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compu_85 compu_85 is offline
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Join Date: May 2008
Location: Springfield VA
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Does the line coming off of it hook into a vacuum solenoid, or does it loop around to the high pressure side of the turbo somehow?

The original .971 turbo has a vacuum wastegate. It's normally open, the computer sends vacuum to it to close the wastegate and make boost.

Some VWs with wastegates do something a bit different: The turbo has a standard pressure wastegate, which is set to open at like 10 psi. The computer uses a "vacuum" solenoid to regulate boost pressure to the turbo, keeping the wastegate closed longer so it makes around 14 psi.
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