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Old 08-20-2012, 06:47 PM   #1
NikeCheck246
Scooby Newbie
 
Member#: 175478
Join Date: Mar 2008
Location: Asheville, NC
Vehicle:
2002 WRX Stage 3
PSM

Default 02 WRX - Cobb V1

First, I have a 2002 WRX Sedan with the following mods:
-VF39 Turbo
-SSAC Front Mount
-STi Pink Injectors
-Walbro 255lph Fuel Pump
-TurboXS Up, Mid, and Down Pipes
-HKS Hi-Power Catback

I also have the Cobb Accessport V1, and it makes me a little nervous. Fixed a bunch of boost leaks and an o2 sensor that was barely threaded into the exhaust, and now I am getting hesitation, detonation, and a feeling that the ecu is generally cutting the timing back. It has been tuned, but I know it was set up with boost leaks and the o2 sensor way out of the stream. I am looking at the VF39 map. What do I need to know or do to get this on my ecu? Obviously, I am a novice, but can I do this? I am fairly computer savvy, but I am a little worried about the last section of the notes, where it talks about what else can be changed and modified, going past the base map. Any help is greatly appreciated!
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Old 08-20-2012, 11:12 PM   #2
NikeCheck246
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Member#: 175478
Join Date: Mar 2008
Location: Asheville, NC
Vehicle:
2002 WRX Stage 3
PSM

Default

Ok, so I took a shot at the VF39 93 Octane Pink Injector map and am happy. However, the car seems to be drastically overboosting. Is there a VF39 low wastegate map, or a way to program the tune to turn it down?
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Old 08-21-2012, 11:23 AM   #3
Cobb Tuning
NASIOC Vendor
 
Member#: 4803
Join Date: Mar 2001
Location: Austin, DFW, Portland, SOCAL
Default

What kind of boost levels are you hitting and under what conditions (i.e. gear, RPM, outside temps, etc)? Do you know what size boost restrictor pill you are running? The VF39 mapping calls for the stock restrictor pill from the 2002-2005 WRX (.047"). If you ran the restrictor pill from the 2004-2006 STi (.043") it would cause the car to over boost. Also, check your boost control vacuum lines to make sure there are no cracks or leaks anywhere. You can use this document here to help you troubleshoot the boost control system.

The VF39 mapping was designed for a top-mount intercooler, so the addition of a front-mount intercooler can throw things off a bit. Also, I assume you have an intake system with the front-mount intecooler. What brand intake is it?

Unfortunately we never made a LWG version of the VF39 mapping and there are very limited options for the APv1 these days. You can try contacting a Pro-Tuner in your area to see if they are willing to tune an APv1, but most will not given that the APv1 is no longer supported. We do offer the trade-in program to get into an APv2 which has free downloadable tuning software called AccessTUNER Race.

Chris
COBB Tuning
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Old 08-21-2012, 04:35 PM   #4
NikeCheck246
Scooby Newbie
 
Member#: 175478
Join Date: Mar 2008
Location: Asheville, NC
Vehicle:
2002 WRX Stage 3
PSM

Default

It is the Perrin short ram intake. I actually found out my issue...my Prosport boost gauge is actually reading much higher at high levels of boost than what I am actually making. I had a friend drive it today with me in the pass seat with the Accessport and it maxed out at 18.3. I am very happy with that.
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