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Old 11-20-2009, 08:13 AM   #1
xrocket21
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Join Date: Feb 2005
Chapter/Region: NESIC
Location: Boston
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2005 STI, 2012 WRX,
2011 F150 ECOBOOST

Default Up pipe leaks and loss of boost

If my up pipe isnt sealing well, could that cause a 10 psi drop in boost?

or would a leaky up pipe result more in a 2-3 psi drop?
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Old 11-20-2009, 08:22 AM   #2
jays05
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05 STI 35r + e85

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It depends on how bad it's leaking. When I made my 10.7@132 pass I had a blown uppipe gasket, it was down about 4-5psi in 1st gear and pretty close to target boost in 5th, but I did jack up the wgdc a few % before that pass because I knew it was leaking.
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Old 11-20-2009, 08:34 AM   #3
xrocket21
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I dont know, it has a small crack in the collector, and I keep blowing out header/uppipe gaskets, pretty sure its currently blown again.
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Old 11-20-2009, 10:18 AM   #4
the suicidal eggroll
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If it was bad enough to drop your boost by 10 psi, it would sound like you were running open header or EWG. It wouldn't be a "leak", it would be a hole.
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Old 11-20-2009, 11:16 AM   #5
mick_the_ginge
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2003 Sleeved 2.5
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I found your boost, it's in my garage. For $5 you can have it back.

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Old 11-20-2009, 02:09 PM   #6
alcoolaid
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Quote:
Originally Posted by mick_the_ginge View Post
I found your boost, it's in my garage. For $5 you can have it back.

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