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ivanuf's Avatar
 
Join Date: Jun 2004
Location: Puerto Rico
Posts: 238
No Boost is this the cause?

I am getting no boost. My first check is the waste gate. I aplied about 15-20 psi thru the lower port and have air blowing around the blue circle area of the photo.



Is my wastegate shot, is this the cause of the no boost condition or this is normal?
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2006 997 C2s Cabrio - Sold
1999 996 C2 - Sold
Old 02-23-2018, 02:29 PM
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Does the wastegate valve open when you apply pressure to the bottom port? If that were leaking, I would suspect you would have the opposite issue and be overboosting since the wastegate would not be opening.
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1976 911S Signature Edition - 3.2SSt (JE 98mm 9.5:1 pistons, 964 Cams, ARP Rod Bolts, Big Port SC Heads, 3.2 Carrera Manifold, ID725's, B&B Headers, TS HyperGate45 Gen V, TS RacePort, BW S360, AEM Infinity 506, E85)
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Old 02-23-2018, 03:40 PM
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When the rubber internal membrane is pierced that causes(provokes) a big pressure, we check(control) nothing more, the flight(leak) of air in your blue circle causes(provokes) maybe the opposite, anyway the wastegate never has to have of flight(leak) of air, you have to change the fibrous joint which is towards(at the place of) the blue circle.

Last edited by Pat RUFBTR; 02-24-2018 at 02:25 AM..
Old 02-24-2018, 02:21 AM
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Thanks for the help. I will install my Tial for now and put this on the to do list.
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79 SC Back to Basics!
2006 997 C2s Cabrio - Sold
1999 996 C2 - Sold
Old 03-01-2018, 05:56 AM
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Looks like your gasket is blown between the hot and cold side. I was unable to purchase these new so made a small batch of gaskets, valve guides, and spring shims to make it possible to rebuild these wastegate's. http://forums.pelicanparts.com/911-930-turbo-super-charging-forum/972314-930-wastegate-rebuild-nla-parts-2.html#post9898817
Old 03-02-2018, 01:17 PM
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