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Engine/Power - EJ20T (pre-2006 WRX and JDM) There is replacement for displacement, it is forced induction - OEM 2.0 liter turbo engines in the USDM WRX. 90-94 Legacy Turbo EJ22 turbo engines can also be discussed here.

will changing uppipe up boost levels?

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Old Dec 24, 2002 | 04:18 PM
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spdkills
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will changing uppipe up boost levels?
Will changing the uppipe up boost levels? The reason I am asking this is because if it does do I need the utec does that mean I wouldn't be able to drive my car without the utec cus of dangerously high boost?
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Old Dec 24, 2002 | 05:17 PM
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supermarkus
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From: Edmonds, WA
No to everything you just said. Your boost level is determined by your factory boost controller, the spool time is decreased with a new up-pipe, not the boost setting.
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Old Dec 26, 2002 | 07:33 PM
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corndog
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It seems like people exchnage the uppipe for two reasons -

Quicker or earlier spooling - less lag
HP gains.

Is it correct that the HP gains are achieved because removal of the restriction allows more air in the cylinder?
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