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Old 03-08-2007, 03:31 PM   #1
BBBsti LTD
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Member#: 71682
Join Date: Oct 2004
Chapter/Region: SCIC
Location: Socal with BORICUA blood...
Vehicle:
2007 WRX Sti LTD.
SWP

Question 17.5 boost of my Defi

I just installed DEFI boost/EGT and OP. The boost readings that I am receiving are peaking at 17.3 and then down to 16 psi. Seems to be high for a stock 2007 STi. I tapped the OEM BPV in the intercooler but the T fitting does not have the restrictor like the one in my old gauges in my old WRX. I am using the Y fitting that came with the Defis and does not fit too well.

2nd gear 17.3 psi.
3rd about the same
4th around 15 psi.

My vac. is around 19-20 at idle. Is this withing the parameters???
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Last edited by BBBsti LTD; 03-08-2007 at 04:19 PM.
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Old 03-08-2007, 03:56 PM   #2
holmgrensubaru
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Member#: 115128
Join Date: May 2006
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Is it the defi-D gauge? they are known to read a bit (1psi or so) high. I had a D-gauge that would read higher than my autometer on the same vehicle same day same conditions.
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Old 03-08-2007, 04:18 PM   #3
BBBsti LTD
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Member#: 71682
Join Date: Oct 2004
Chapter/Region: SCIC
Location: Socal with BORICUA blood...
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2007 WRX Sti LTD.
SWP

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Defis are BF imperial
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Old 03-30-2007, 02:50 AM   #4
MERT K
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Member#: 81807
Join Date: Feb 2005
Chapter/Region: NESIC
Location: CT
Vehicle:
07 WRX STi
Urban Grey & wingless

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^ oem baby
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Old 03-30-2007, 02:57 AM   #5
veightkiller
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Member#: 78967
Join Date: Jan 2005
Chapter/Region: VIC
Location: vancouver B.C
Vehicle:
2011 335i
Black

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it reads the same as mine
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Old 04-02-2007, 12:40 AM   #6
Nintekra
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Member#: 126636
Join Date: Sep 2006
Location: Jacksonville FL
Vehicle:
06 Impreza STI
blue

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Mine run the same way and Im using a catback. I thought it was creep.
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