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Old 11-15-2001, 07:42 PM   #1
Gone.. But not forgotten
Member#: 9863
Join Date: Sep 2001
Location: Mendacity, U.S.
02 WRX Blue & Fast
91 S10 Red & Abused

Default turbo hoses

I have been reading a lot of posts lately about mbc's, ebcs, and bleeder valves. I even made the $4 mbc. I noticed how there is a restrictor in the line that goes from the turbo outlet to the tee. I was wondering what the effect would be if you somehow put more restriction in one of the lines or even pinched one of the lines (either from the turbo to the tee, tee to fbc, or tee to wastegate). Any comments would be appreciated.

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Old 11-16-2001, 12:25 AM   #2
Scooby Guru
Member#: 8512
Join Date: Jul 2001
Chapter/Region: South East
Location: St. Pete, FL
2002 WRX chassis...


I think you may want to post this (or have it moved by a moderator) to Factory Forced Induction. I don't think this is a very newbie question to ask, and the people who are likely to answer your question are probably not avid readers of this forum But who knows...give it a day.
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Old 11-16-2001, 12:33 AM   #3
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Join Date: Apr 2001
Location: Colorado Springs, CO. USA
2004 Impreza WRX STi
Aspen White


You would overboost as you would reduce or eliminate the signal to the factory boost control selenoid and the wastegate actuator. Guys running the Unichip are given a restrictor hose with a smaller diameter restrictor. This raises the boost the engine sees. If you completely plug it off the turbo would boost until fuel cut.

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