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Registered
Join Date: Jun 1999
Location: North Georgia
Posts: 420
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Wastegate Issues - Diagram Needed !
Boys,
With the guidance of John Walker I was finally able to tune my 3.3 Turbo motor to a useable level. The car f'ing flies. I am having intermittant Wastegate or Turbo issues which I need help with. On most occasions when the car gets up to temperature, the Turbo spools perfectly and explodes on full boost. But often the Turbo doesn't spool and the car runs as a normally aspirated 911. The motor sat for 10 years so there may be some "sticking" or "rusty" parts which may be preventing normal turbo operation. Today after driving the car for about 20 minutes, the turbo was not working. When I got back to the house, the wastegate muffler was warm as if it had been exhausting bhut no spool. I'm thinking the wastegate is not closing all the way. Is there a service routine for a wastegate ? Does anyone have a digram so I can get educated? 79 3.3 Turbo. Thanks Boys.
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2014 911 GT3 1979 930 Turbo 1970 911T 2016 Cayman 2019 Macan |
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03-31-2002, 03:38 PM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,491
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if the WG was stuck open, you would be able to feel exhaust out of it's pipe. unmuffled exhaust for that matter. you did say once that the turbo didn't spin freely. did you check that again?
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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03-31-2002, 04:53 PM
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Join Date: Dec 2001
Location: MA USA
Posts: 2,938
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You can test the wastegate operation by removing the WG muffler and hooking up an air supply to the WG actuation port. Make sure that it is a regulated air supply and the wastegate doesn't see more than 15 psi. It should open around 11psi.
Dean |
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03-31-2002, 06:39 PM
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