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Boost Leak

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Old 09-23-2007, 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 09-23-2007, 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 09-23-2007, 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 09-24-2007, 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 09-26-2007, 07:12 AM
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anyone else got suggestions?
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Old 09-26-2007, 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 09-26-2007, 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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