Couple questions about the 08 WRX - Subaru WRX Forum
LinkBack Thread Tools Display Modes
post #1 of 3 Old 06-17-2008, 02:12 PM Thread Starter
WRXtuners Member
MsclTnr0208's Avatar
Join Date: Apr 2008
Location: Pennsylvania
Posts: 15
Images: 4
Send a message via AIM to MsclTnr0208
Couple questions about the 08 WRX

First question is simple. I'm in need of new tires and i'm not happy with the factory size, will 225/45/17 fit on my car or is the factory rim to thin? Second I have a custom 3 inch cat back and a custom CAI on my car. I hooked up a boost gauge and around 4k rpms my PSI starts dropping. It goes from around 13 or 14 down to about 7 at 6k rpms, but it will hold the 13 PSI if i don't go over 4k. Someone told me that a smaller turbo will lose PSI at higher rpms but i can't see it losing that much. Also a little while ago a oil line that went to my turbo broke and was spewin oil everywhere and I had to drive it a little bit before i got it fixed. Does the PSI drop sound like a boost leak? Or could my turbo possibly have been damaged from my oil problems?
MsclTnr0208 is offline  
Sponsored Links
post #2 of 3 Old 06-17-2008, 02:19 PM
mosc's Avatar
Join Date: Mar 2005
Location: Pennsylvania
Posts: 6,808
Images: 7
the 225s will fit without issue as long as they are fairly stiff sidewall (anything high performance).

The 7psi at 6k RPM is about right. It's a 2.5L motor and a tiny ass turbo. It can't supply enough air at the higher RPMs to hold max boost. Max boost is at about 3500rpm, like you've been seeing.

Doesn't sound like your oil spewing caused any harm?

2015 STi: Still Stock
04 STi, 04 WRX: SOLD
mosc is offline  
post #3 of 3 Old 06-17-2008, 04:11 PM
dumdum's Avatar
Join Date: Sep 2004
Location: Virginia
Posts: 2,800
Images: 12
Get some engine management and the boost levels will go up with a new tune.
PERRIN Stage 1 2008 WRX Test and Tune - NASIOC
TurboXS 2008 WRX Stage 1 & Stage 2 Results! - NASIOC

Homebrewed tuned with Opensource!
dumdum is offline  

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome