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Old 10-06-2011, 09:40 PM   #1
SSP6
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Default Finally got my AP back from Cobb! now low boost.

so my 02 wagon stock exh, short ram intake just got flashed stg 1 93 v300, but looking at logs shows me 13.4psi max on a 15.6 target. my DAM on the log reads 15.0 across the board. is that right? the only thing i can think of is after i installed the AP and flashed, i didnt reset the ecm. guess i should do that first huh? not sure how to host docs otherwise i'd post up a log.
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Old 10-06-2011, 09:54 PM   #2
WiRX
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Target boost for that map is 14.8 +/- .5 tapering to 12. You can try the High Wastegate map which is for your situation of not reaching target boost. I've never used a high wg map but if it causing overboosting you might also be able to manually adjust you wastegate linkage too. Id try loading the High WG map first.
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Old 10-06-2011, 09:59 PM   #3
SSP6
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i'm gonna try the hwg first, if that flys i'm gonna give the new beta map a shot
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Old 10-07-2011, 07:52 AM   #4
Cobb Tuning
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Originally Posted by SSP6 View Post
so my 02 wagon stock exh, short ram intake just got flashed stg 1 93 v300, but looking at logs shows me 13.4psi max on a 15.6 target. my DAM on the log reads 15.0 across the board. is that right? the only thing i can think of is after i installed the AP and flashed, i didnt reset the ecm. guess i should do that first huh? not sure how to host docs otherwise i'd post up a log.
Do not flash to the HWG map just yet. A DAM of 15 indicates that the DAM has dropped from its max of 16 (indicating knock). Although the DAM drops to an initial value after a reflash/reset (typically 12 with our OTS maps) and then will have to learn up to 16, the specific way it which it learns means it will not hit 15 until it first hits 16, drops to 14, and then up to 15.

I would flash our new 02-05 WRX beta maps (for the AP v2). They are much more consistent than the old maps and many of our customers who have tried them have had great results. You'll also want to post up a data log. These older cars typically can have a number of problems. The big one is a bad MAF that causes airflow to be underreported and the car runs lean - causing knock. Try to post up your old log(s) on google docs (make sure you set the permissions so that anyone can view it). You want a 3rd gear run at wide open throttle from about 2000 RPM up to near redline (if you can do safely).

Bill
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Old 10-07-2011, 10:26 PM   #5
SSP6
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i'm replacing the MAF and the A/f sensor, i did flash to the beta map, it is incredible! so smooth!, i found a small boost leak in the lamco boost gauge/line, removed the T and picked up a consistent .5psi. since i've only had the car for about a month i'm shaking it down slowly. thanx for the help. i have boxes of parts to install, but want to get it running solid first.
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Old 10-11-2011, 11:03 PM   #6
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ok, cleaned my MAF now no knock, consistent DAM 16, but low calc load and still not hitting boost targets. max calc load of 1.89. max boost 14.0 w/ 15.78 target. after extensive diag i'm left with really only one option, a clogged cat. its really the only explanation for my situation. it just feels slow from 4800-6300 at wot. guess its time to install the invidia/grimmspeed system and find out.
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Old 10-12-2011, 10:01 AM   #7
Cobb Tuning
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Originally Posted by SSP6 View Post
ok, cleaned my MAF now no knock, consistent DAM 16, but low calc load and still not hitting boost targets. max calc load of 1.89. max boost 14.0 w/ 15.78 target. after extensive diag i'm left with really only one option, a clogged cat. its really the only explanation for my situation. it just feels slow from 4800-6300 at wot. guess its time to install the invidia/grimmspeed system and find out.
I don't think I would jump to that conclusion. Do you have any 3rd gear wide open throttle logs that you can put up on google docs?

Cleaning the MAF may improve things, but sometimes it just needs to be replaced, especially on these old cars. It is critical that the MAF sensor is accurately determining airflow. So critical that if you suspect the MAF sensor of having issues, it is best to just replace it with a new one, especially on an old car.

The 02-05 WRX have a lot of car-to-car variation when it comes to boost. If everything looks good with no knock, the next step would be to flash the HWG map. If you still aren't hitting your target, then you can tighten the wastegate arm until you do.

Bill
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Old 10-15-2011, 09:04 PM   #8
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alright, thanx for the input. i flashed the HWG and still no change even tho i'm seeing higher WG duty cycle. i'm after the arm next, and i'll tey to upload the logs as soon as i get time. really appreciate the help.
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Old 11-09-2011, 05:12 PM   #9
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so, now i'm running the beta stage 2 93. still had low boost until i re installed the factory airbox, now i'm real close to target boost, one quik arm adj and i should be money. beta runs 17.28 psi and i'm hitting 16.4 consistently.
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Old 11-09-2011, 05:18 PM   #10
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Quote:
Originally Posted by SSP6
so, now i'm running the beta stage 2 93. still had low boost until i re installed the factory airbox, now i'm real close to target boost, one quik arm adj and i should be money. beta runs 17.28 psi and i'm hitting 16.4 consistently.
Sorry for being noob but how can i see on live data on ap to measure target boost ? Or using gauge is better ?
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Old 11-09-2011, 07:13 PM   #11
Cobb Tuning
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Sorry for being noob but how can i see on live data on ap to measure target boost ? Or using gauge is better ?
The "Boost" parameter is what you what to view in order to determine the actual boost you are seeing (i.e. what would be the equivalent of a boost gauge). "Target Boost" is what the engine control unit (ECU) is targeting at sea level. You can view either of these parameters (and many more) with an AP v2 via the "Monitor" -> "Live Data" function. The best thing to do is to get a data log:
http://www.cobbtuning.com/info/?id=6167

Bill
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