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LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Vaccuum pressure seems low???

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Old Oct 13, 2004 | 07:39 PM
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cmking26's Avatar
cmking26
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Joined: May 2004
Posts: 516
From: Illinois
Vaccuum pressure seems low???
With my mods in sig I am only getting 7in of vaccuum. It seems to brake ok, is there any problem with it being so low? And that is at idle 1000rpm.
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Old Oct 13, 2004 | 07:49 PM
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ibanez6rg
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Joined: May 2002
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From: Cincinnati, OH
Re: Vaccuum pressure seems low???
I'm getting 11 inches with my setup, which I think is about right.
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Old Oct 13, 2004 | 09:53 PM
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Spinner
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Joined: Jul 2003
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From: Fort Benning, GA
Re: Vaccuum pressure seems low???
You have either a vac leak or a valve adjustment issue. With a cam a bit bigger then a 306 I pull 10.5 inches.
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