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Old 10-18-2011, 08:21 AM   #1
Mansour14
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Join Date: Apr 2011
Chapter/Region: South East
Location: Lakeland, FL
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2004 Wrx
Blue

Default 04 wrx losing power w/ AP?

Okay. So I have a 2004 wrx. With these mods:

-Stock exhaust (Fully gutted all the way to the turbo with a turbo XS muffler) <------ Technically This is full turboback, correct?

-K&N drop in filter

-STI upipe with no bung.

-Cobb Accessport V2.

I Put it on stage 2 93 oct. But I Feel like Im not getting the maxium power the AP offers. Is my setup okay?
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Old 10-18-2011, 08:39 AM   #2
jaxscuby
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because it is a off the shelf map.
and how long has it been on the car?
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Old 10-18-2011, 09:22 AM   #3
Cobb Tuning
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Quote:
Originally Posted by Mansour14 View Post
Okay. So I have a 2004 wrx. With these mods:

-Stock exhaust (Fully gutted all the way to the turbo with a turbo XS muffler) <------ Technically This is full turboback, correct?

-K&N drop in filter

-STI upipe with no bung.

-Cobb Accessport V2.

I Put it on stage 2 93 oct. But I Feel like Im not getting the maxium power the AP offers. Is my setup okay?
Hi there.

A gutted factory downpipe/midpipe is probably going to be more restrictive than even an aftermarket full turbo back with high-flow cat. That said, what I would do first is switch to our new beta maps for 02-05 WRX. They are much more consistent than the old maps (and will soon become the current maps on the AP). They can be found here:
http://forums.nasioc.com/forums/show....php?t=2233868

Then you want to do a data log so we can see how things look. Here's a new video that explains how to do this and also describes some of the key monitors:

Post up your log here by putting it on google docs, setting the permissions so anyone can view it, and then link to it in your post. Wait until the DAM gets up 16 before doing your wide open throttle (WOT) run.

Bill
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Old 10-18-2011, 10:27 AM   #4
Mansour14
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Member#: 279796
Join Date: Apr 2011
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Location: Lakeland, FL
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2004 Wrx
Blue

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Quote:
Originally Posted by jaxscuby View Post
because it is a off the shelf map.
and how long has it been on the car?
For 3 weeks.
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Old 10-18-2011, 10:34 AM   #5
Mansour14
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Join Date: Apr 2011
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Location: Lakeland, FL
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2004 Wrx
Blue

Default

Quote:
Originally Posted by Cobb Tuning View Post
Hi there.

A gutted factory downpipe/midpipe is probably going to be more restrictive than even an aftermarket full turbo back with high-flow cat. That said, what I would do first is switch to our new beta maps for 02-05 WRX. They are much more consistent than the old maps (and will soon become the current maps on the AP). They can be found here:
http://forums.nasioc.com/forums/show....php?t=2233868

Then you want to do a data log so we can see how things look. Here's a new video that explains how to do this and also describes some of the key monitors:
AskCOBB - Subaru Data Logging - YouTube

Post up your log here by putting it on google docs, setting the permissions so anyone can view it, and then link to it in your post. Wait until the DAM gets up 16 before doing your wide open throttle (WOT) run.

Bill

With the mods I have listed above, which map exactly should I use for maxium performance?
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Old 10-18-2011, 10:51 AM   #6
Cobb Tuning
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Quote:
Originally Posted by Mansour14 View Post
With the mods I have listed above, which map exactly should I use for maxium performance?
I would start with the stage 2 map (the normal wastegate map) and then do some logging as per video (if you can do so safely). Post up your log and we can see how boost control is doing and go from there. This will also possibly tell us if there are any other issues with the car.

Bill
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Old 10-18-2011, 04:14 PM   #7
Mansour14
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Location: Lakeland, FL
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2004 Wrx
Blue

Default

Quote:
Originally Posted by Cobb Tuning View Post
I would start with the stage 2 map (the normal wastegate map) and then do some logging as per video (if you can do so safely). Post up your log and we can see how boost control is doing and go from there. This will also possibly tell us if there are any other issues with the car.

Bill
Okay, I used the 310 stage 2 reg map setup. I hit 13 psi in 2nd and 13.8-14 psi in 3rd. It still feels the same as the others. And I tried the HWG and LWG stage 2 maps and I still didn't feel a difference.

I will do some logging after this rain outside stops and let you take a look at it.

But my question is, with the mods I had listed above, would it still meet "COBB" specifications?
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Old 10-18-2011, 04:20 PM   #8
Psychoreo
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So stock, gutted downpipe, stock midpipe, txs axleback?
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Old 10-18-2011, 04:41 PM   #9
Mansour14
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Quote:
Originally Posted by Psychoreo View Post
So stock, gutted downpipe, stock midpipe, txs axleback?
Yessir
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Old 10-19-2011, 08:35 AM   #10
Cobb Tuning
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Quote:
Originally Posted by Mansour14 View Post
Okay, I used the 310 stage 2 reg map setup. I hit 13 psi in 2nd and 13.8-14 psi in 3rd. It still feels the same as the others. And I tried the HWG and LWG stage 2 maps and I still didn't feel a difference.

I will do some logging after this rain outside stops and let you take a look at it.

But my question is, with the mods I had listed above, would it still meet "COBB" specifications?
Sort of. We recommend an aftermarket downpipe. Likely what will happen with your set-up is that you'll be underboosting. But, each car is diffferent, so I would get a data log first (WOT 3rd gear 2000 RPM up to near redline if you can do so safely).

Bill
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Old 10-20-2011, 08:05 AM   #11
Mansour14
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Member#: 279796
Join Date: Apr 2011
Chapter/Region: South East
Location: Lakeland, FL
Vehicle:
2004 Wrx
Blue

Default

Quote:
Originally Posted by Cobb Tuning View Post
Sort of. We recommend an aftermarket downpipe. Likely what will happen with your set-up is that you'll be underboosting. But, each car is diffferent, so I would get a data log first (WOT 3rd gear 2000 RPM up to near redline if you can do so safely).

Bill
Alright, I will do that on my next day off work!
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