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Old Sep 23, 2007 | 08:57 PM
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Default Boost Leak

Did a boost leak check for the first time today and fixed 4, but air leaks out of the throttle body... NW 90mm.....it leaks from where the throttle blade goes through housing.(circled in pic) is this normal?

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Old Sep 23, 2007 | 09:08 PM
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Mine does the same. I have a Holley 90mm. I tried replacing it with another and it does the same thing. I would like if this is normal also.
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Old Sep 23, 2007 | 09:12 PM
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Alot of air goes through it which is a leak and can draw un-metered air.......I could only see like 11psi on the boost gauge even when I cranked the air up.
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Old Sep 24, 2007 | 07:30 AM
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I think there is a seal....Here is a diy page for a different throttle body

http://ca.dsm.org/FAQ/tb-shaftseals.html
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Old Sep 26, 2007 | 07:12 AM
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anyone else got suggestions?
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Old Sep 26, 2007 | 10:16 AM
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That's interesting. I will have to check mind since I am running a NW90 and am chasing a big boost leak.
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Old Sep 26, 2007 | 12:04 PM
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It leaks alot of air and I called Nick and he said I could send it to him, but havn't heard back from him
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