Boost creep on a stock STi?

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Jul 17, 2004 | 01:56 PM

03WRX!!!

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Has boost creep been fixed for '05???

Has the boost creep issue been resolved for the '05 model? and if it hasnt woudld
u still buy the car over again?

Last edited by 03WRX!!!; Jul 17, 2004 at 02:14 PM.

Jul 17, 2004 | 03:09 PM

punkrocksailor

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Boost creep only happens with free flowing (i.e. no cats) turbo-backs. It's a wastegate size problem, it can either be solved by porting the wastegate or using EM that will let you raise the boost.
Cheers,
Joel

Jul 18, 2004 | 03:27 AM

lobelsteve

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Engine mgmt cannot fix boost creep, it may help reduce it, but not enough to safely pull in 5th and 5th gears. Porting the wastegate and maybe even replacing the flapper are needed.

I had my wastegate ported and still got creep. Then I had a Black Hole flapper installed and now its perfect.

Jul 18, 2004 | 12:32 PM

punkrocksailor

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When the engine management is raising the boost to 18-19 psi it will get rid of the problem boost creep, there may still be a little creep, but nothing to throw fuel cut.

Jul 18, 2004 | 12:53 PM

lobelsteve

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Caveat emptor.

Search NASIOC when it comes back online. There is a highly detailed STICKY with all you need to know.

Jul 19, 2004 | 09:06 AM

Egan

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Joined: Nov 2001

Posts: 14,221

From: Peoples Republik of Kalifornia

Car Info: 05 H2 SUT, 45 GPW, 10 Murano, 13 Boss 302

Quote:

Originally Posted by punkrocksailor

I don't know, I hit 16.5 psi out on the track and I have zero engine/exhaust/turbo/management mods. My PSI3 recorded a peak boost of 16.5 and had triggered the high boost alarm. It could have been an anomolous reading or a one-off occurance though.