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Old 07-10-2007, 07:50 PM   #1
1BDREX
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Member#: 153047
Join Date: Jul 2007
Chapter/Region: South East
Location: Tampa,FL
Vehicle:
04 WRX
Silver

Default Boost bounce

Hey u guys i got an 04 wrx tbe,uppipe,k&n typhoon,hyperflow tmic,perrin ebcs,and tuned with enginuity by a good tuner in town.i just got a retune for my intake last week w a target boost of 18psi for right now.the problem im having since the first tune is that sometimes when i floor it wot between maybe 3k to like 4500 rpms the boost spikes to 19 and it bounces back to 15 and back and forth not steady.i can even feel it in the car how it pulls back.but again it doesnt doit all the time. me and my tuner think it could either be a leak but mostlikely a faulty ebcs. what do u guys think,have any of u guys experienced anything like this before? if its a leak,where should i be looking at? thanx
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Old 07-11-2007, 03:35 AM   #2
HndaTch627
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Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

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your tuner needs to edit your Turbo Dynamics fields
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Old 07-11-2007, 09:02 AM   #3
blkscooby
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Join Date: Sep 2003
Chapter/Region: SWIC
Location: Gilbert, AZ
Vehicle:
2009 G8 GT
Cammed, sprayed, stalled

Default

Quote:
Originally Posted by HndaTch627 View Post
your tuner needs to edit your Turbo Dynamics fields
What he said. Good tuners know that you cannot simply change the boost target and WGDC to reach higher boost. The dynamics have to be changed also.

It could also be that your boost targets are too aggressive at low RPM where the car simply can't make that much boost. Then what happens is the turbo dynamics come into play and add to the WGDC until the car overboosts and then corrects- aka boost bounce.
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Old 07-11-2007, 06:05 PM   #4
06rexwagon
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Join Date: May 2006
Chapter/Region: SWIC
Location: Albuquerque, NM
Vehicle:
2006 WRX Limited Wag
9.8@150

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Yup. What the 2 guys above me said.
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