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View Full Version : how much boost can be run on my STI EJ25T

ben9394
10-05-2003, 03:47 AM
Hi
i got a 04 WRX STI runing Cold air intake, Blitz SBC DC,
Does anyone know or recomened how much boost can be run on my car is safty.
Imprezer
10-05-2003, 11:09 AM
The car already pings as is. Leave the boost alone until you get engine management.
Kevin M
10-05-2003, 01:51 PM
Get rid of the intake too. If it is leaning out the car, you'll ping even worse.
Randman
10-10-2003, 10:00 AM
Just wondering, what is the stock boost on the STi?
Snowy
10-10-2003, 12:20 PM
It can vary on how the car has been driven, but the best I heard of was turboXS's at 15.6psi. Most others are a little lower. The stock turbo is running at 100% so increasing boost will require a turbo upgrade. Here's a good link for you to read about this. http://forums.nasioc.com/forums/showthread.php?s=&threadid=372280&perpage=25&pagenumber=1
Magish
10-11-2003, 09:42 AM
I heard 15psi but I may be off a tad bit.
Cheers
-Jeff
Kevin M
10-11-2003, 11:58 PM
It's typically about 15 psi. Slightly higher than a WRX.
grknss
10-12-2003, 08:14 PM
that sounds about right, I thought it was 13.5 for the WRX and 14.5 for the STI
Kevin M
10-12-2003, 11:05 PM
WRX peaks at 1 bar, or 14.7 psi.
adamRmr
10-15-2003, 10:12 PM
Originally posted by BAN SUVS
WRX peaks at 1 bar, or 14.7 psi.
1 bar =14.7 or 14.5:confused: :confused:
adamRmr
10-15-2003, 10:16 PM
sorry
A measure of air pressure 1 Bar= 14.7psi = 1 atm
Kevin M
10-16-2003, 01:02 AM
Yup. I probably should have just said ~14.5 psi. :p
Jgrahn555
10-16-2003, 01:45 PM
:rolleyes:

Shouldn't have to... None the less.....
machaf
10-18-2003, 04:24 PM
1 bar = 14.5psi

standard pressure at sea level = 14.7psi
Kevin M
10-18-2003, 05:54 PM
There are 2 definitons of bar, either 14.5 or 14.7 is considered 1 bar depending on who you ask. That's why I said I should have said 14.5 psi, give or take.
STi City
10-28-2003, 02:38 PM
Yesterday, I went to SCCA and my peak boost was 1.21 Bar or 17.8 PSI. I think this is bad without engine management? Anyways, I reset the peak boost and I usually get 1.12 bar or 16.5 PSI. I only have a Perring downpipe and did the silencer mod. What you guys think? Dangerous or not. I do not hear any pinging.