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Old 06-21-2006, 02:12 PM   #1
Bbasso
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Question What should the target boost be?

I have a 05 Auto tranny WRX with Cobb Up and catted DP with Samco IC hoses, K&N airfilter and the AP set to stg 2 93 octane.

I'm seeing only 14.7 with a very rare 15.0 psi, Is that normal?

The car feels like a champ, but thought it should be a little bit higher...
Btw I'm at sea level with Normal weather conditions.
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Old 06-21-2006, 08:13 PM   #2
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15.8 +/- .5. How long have you had the cobb stg 2? You might have to adjust your wastegate arm actuator. Thats what I had to do in order to hit target boost. I did 2.5 turns and I hit 16-16.5lbs. Try that. Theres a thread around here somewhere on how to do it.
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Old 06-22-2006, 12:37 AM   #3
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yea i regularly hit 16.5-17.0 lbs.
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Old 06-22-2006, 01:38 AM   #4
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Quote:
Originally Posted by wirolla
yea i regularly hit 16.5-17.0 lbs.
Did you play with the wastegate or no?
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Old 06-22-2006, 01:39 AM   #5
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Quote:
Originally Posted by Bbasso
I have a 05 Auto tranny WRX with Cobb Up and catted DP with Samco IC hoses, K&N airfilter and the AP set to stg 2 93 octane.

I'm seeing only 14.7 with a very rare 15.0 psi, Is that normal?

The car feels like a champ, but thought it should be a little bit higher...
Btw I'm at sea level with Normal weather conditions.
Ill let you know once I get mine installed... in a month
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Old 06-22-2006, 06:01 AM   #6
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Quote:
Originally Posted by RedLine55
Did you play with the wastegate or no?
Didn't have to adjust the WG. When I first flashed, the car was maxing at 16.2.

Couple of weeks later, I was seeing 16.6-17.2, depending on ambient air temp.

To the OP, when you do your WG adjustment, I'd suggest you start with 1.5 turns and go from there (just to be safe). You can always add half-turns depending on how the car runs.
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Old 06-22-2006, 11:36 AM   #7
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no, i didnt do any wastegate adjustments
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Old 06-22-2006, 12:30 PM   #8
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Did not touch that... I don't even know where it is :P

I think I found the problem, A slight leak where the up pipe meets the turbo
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Old 06-22-2006, 02:53 PM   #9
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Target boost for 02-05 WRX's is 15.8 + or - .5 psi.
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Old 06-22-2006, 03:10 PM   #10
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Are you guys looking at your AP's Live boost gauge or on a boost gauge in your car? I too am only reaching 14.7-15.0 on the live boost read out, but I'm easily pushing 15.5-16.0 on my boost gauge.
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Old 06-22-2006, 03:51 PM   #11
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maddad boost gauge in my car....
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Old 06-22-2006, 04:59 PM   #12
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I was hitting 16.5 on cold days no i see higher 15's...damn hot ass summer lol...I do have a couple exhaust leaks though. I think im gonna fix those and see what a protune can get me :P
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Old 06-22-2006, 05:24 PM   #13
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Will the target boost be lower if you just have a downpipe on stage 2 (3" downpipe + stock midpipe + Sti Axleback) opposed to a full TBE?
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Old 06-22-2006, 05:54 PM   #14
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Quote:
Originally Posted by cjx17
Will the target boost be lower if you just have a downpipe on stage 2 (3" downpipe + stock midpipe + Sti Axleback) opposed to a full TBE?
No. I'm running a Stromung shorty DP, STI UP, and STI AB. I'm making 15.8-16.6 PSI according to the AP in 4th gear. It usually peaks at about 16.3-16.4 PSI in 4th gear. 1st through 3rd gear I see lower boost.
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Old 06-22-2006, 06:25 PM   #15
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I'm reading the PSI right off the AP.
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Old 06-22-2006, 07:21 PM   #16
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Quote:
Originally Posted by imprez25
Are you guys looking at your AP's Live boost gauge or on a boost gauge in your car? I too am only reaching 14.7-15.0 on the live boost read out, but I'm easily pushing 15.5-16.0 on my boost gauge.
Just did this last night, after 2 weeks of waiting I decided to check to see if I was hitting targets. 04 Auto. Our max was 15.1, so we stopped and changed the realtime map to the Stage 2 HWG map. 3 pulls later I was hitting consistant 15.8s with spikes to 16.3 on shifts, which is perfect.

I would load up a HWG map before playing with the wastegate actuator. If you start spiking with the HWG map, then go back to a regular map and try adjusting the actuator. Its alot easier to try the HWG map first since it takes like 10 seconds to change a real time map
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Old 06-23-2006, 09:58 AM   #17
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Master- Thanks, I'll give the HWG map a try. However, where are you looking for your boost #'s; AP or Boost gauge? I assume AP since this is read on the same scale for everyone vs. a boost gauge lends itself to interpretation and variables in build quality. (I think I just answered my own question.)

I read that the HWG maps just increases boost across the board and this can lead to ptfb issues. With the HWG map are you experienceing any ptfb issues?
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Old 06-23-2006, 12:39 PM   #18
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Quote:
Originally Posted by cjx17
Will the target boost be lower if you just have a downpipe on stage 2 (3" downpipe + stock midpipe + Sti Axleback) opposed to a full TBE?
Yes, its very possible. The map was made for a full turbo back.

Last edited by parker/slc/gc8fan; 07-27-2006 at 11:45 AM.
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Old 06-23-2006, 01:00 PM   #19
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Quote:
Originally Posted by cjx17
Will the target boost be lower if you just have a downpipe on stage 2 (3" downpipe + stock midpipe + Sti Axleback) opposed to a full TBE?
it's possible. i couldn't hit target boost until i got a catback.
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Old 06-23-2006, 01:22 PM   #20
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stage II. uppipe. 2.5" shorty dp, stock midpipe, magnaflow axelback..best I can do is 15.1 lbs. Talking to Cobb they say that is to be expected because I am not running the 3"TBE. basically missing target by .2 if target is 15.8 +/- .5. Probably not even worth screwing with it.
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Old 06-23-2006, 04:03 PM   #21
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Quote:
Originally Posted by Glenn H.
stage II. uppipe. 2.5" shorty dp, stock midpipe, magnaflow axelback..best I can do is 15.1 lbs. Talking to Cobb they say that is to be expected because I am not running the 3"TBE. basically missing target by .2 if target is 15.8 +/- .5. Probably not even worth screwing with it.
2 turns of the wastegate, and an adjustment of the throttle cable (there was a little slack in it), and I was hitting target boost in 4th gear. This was with UP, shorty DP, IC hose and everything else stock (3rd cat, resonator, axleback) on CA stage 2 map. I don't think the tightening of the throttle cable did anything for the boost, but it definitely helped throttle response. I adjusted both at the same time, but the combo of the two made a huge difference in drivability and performance.

I was always skeptical about tightening the wastegate, but now I wish I had done it a long time ago. Also check your throttle cable and make sure it's taunt. Don't touch the cruise control cable on accident though.
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Old 06-23-2006, 04:15 PM   #22
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The thing that has kept me from doing it is the turbo heat shield. Isnt it like a million almost impossible to reach bolts to remove it? I know its more like eight but I cant even see 5 of them...any help on this?
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Old 06-23-2006, 04:30 PM   #23
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Quote:
Originally Posted by Glenn H.
The thing that has kept me from doing it is the turbo heat shield. Isnt it like a million almost impossible to reach bolts to remove it? I know its more like eight but I cant even see 5 of them...any help on this?
its easy, just do it!
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Old 06-23-2006, 04:34 PM   #24
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Quote:
Originally Posted by wirolla
its easy, just do it!
Ok now I understand
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Old 06-23-2006, 04:51 PM   #25
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i dont get what there is to understand... ...just loosen the bolts, remove the heat shield, and adjust at will.
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