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How would you know if you have a boost leak?

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Old May 17, 2009 | 09:00 PM
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RV2
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From: Georgia
How would you know if you have a boost leak?
Cruising around my truck doesnt seem to make boost but when I lay into the throttle heavily it makes about 35#
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Old May 17, 2009 | 09:03 PM
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From: Goshen, Ky
Your truck shouldn't make any boost just cruising around.

List your mods, and we can tell you if we suspect a boost leak. 35psi of boost is pushing your luck with a stock headgasket.
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Old May 17, 2009 | 09:10 PM
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It's a 93 dually with a getrag, previous owner told me the pump has been played with and it has 2nd gen turbo on it.
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Old May 17, 2009 | 09:24 PM
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From: Goshen, Ky
35psi sounds kind of high for an intercooled truck with just pump tuning. I would say you definitely don't have a boost leak.
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Old May 17, 2009 | 09:33 PM
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I forgot to add that it has no muffler and it appears to be 3" pipe.
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Old May 17, 2009 | 09:39 PM
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Originally Posted by RV2
Cruising around my truck doesnt seem to make boost but when I lay into the throttle heavily it makes about 35#
Boost is directly related to engine load hence light load = low boost
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Old May 17, 2009 | 10:12 PM
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Originally Posted by '91 1st Gen
Your truck shouldn't make any boost just cruising around.

List your mods, and we can tell you if we suspect a boost leak. 35psi of boost is pushing your luck with a stock headgasket.

Well then, my 93 has 42 pounds of boost, guess I will be walking soon.
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