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Old 07-03-2006, 07:45 PM   #1
tkarabian
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Default Finally got an AP, but I'm only boosting to 13 psi???

So I just got a Cobb AP for my 04 wrx. It's stock except for a catback. I flashed my ECU with the Stage 1 CA 91 base map. I used the AP to read my boost levels, and the highest I saw was about 13.7 psi. I did a few third gear and 4th gear pulls and thats the highest number I saw. I didn't notice a huge improvement in performance like I was expecting, but maybe it's because I'm not boosting enough? I thought a stock WRX should be boosting around 16 psi.

So, where should I start looking to fix this problem. Thanks
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Old 07-03-2006, 07:48 PM   #2
-Kevlar-
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your almost in range... 14.7 +/- .5 psi...
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Old 07-03-2006, 07:49 PM   #3
REX8
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Dont trust the AP for your boost levels...

A stock WRX s about 13.5 PSI...you should REALLY feel a difference, even if you are really a couple PSI low...
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Old 07-03-2006, 07:51 PM   #4
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I haven't taken it on the freeway yet, hopefully I'll see a big difference there.
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Old 07-03-2006, 07:53 PM   #5
nhluhr
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Since it's using the stock adaptive boost control and timing authority, you will definitely see an increase in performance over the next few drives. When you first flash on the map, it starts you at half the normal dynamic timing advance and the boost control also has some learning to it as well. Soon you should be feeling quite a difference.
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Old 07-03-2006, 07:57 PM   #6
tkarabian
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Should I be driving it carefully, hard, or regular for the next couple of days to see the most gains?
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Old 07-03-2006, 07:59 PM   #7
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Quote:
Originally Posted by REX8
Dont trust the AP for your boost levels...

...
why not? the ap reads boost from the stock MAP sensor electonically, it's about as acurate as it gets (up to about 18.3 when it stops reading of course).
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Old 07-03-2006, 07:59 PM   #8
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yup.. when I flashed to Stage 1 it took a few days until I noticed a difference. The biggest change I noticed was how much smoother the acceleration was. Was smooth and strong all the way to redline.
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Old 07-03-2006, 08:00 PM   #9
hondaeater69
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Quote:
Originally Posted by tkarabian
Should I be driving it carefully, hard, or regular for the next couple of days to see the most gains?

Drive it regularly, with some spirited runs here and there.
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Old 07-03-2006, 08:06 PM   #10
CapeRex
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My car feels way better at Stage 1,but I'm also not seeing any higher boost than stock on my Omori gauge.

I'm happy with it,but am just curious if it should be better.The longblock and turbo are only 3k miles old,also,and I flashed it after maybe 1k on the new stuff.Could that be an issue? I didn't follow the strict 4k rpm limit during break-in this time,either.

Sorry to hijack if I did....just having a similar issue.
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Old 07-03-2006, 08:24 PM   #11
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Gm electric boost solenoid & protune FTW
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Old 07-03-2006, 09:46 PM   #12
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Quote:
Originally Posted by hondaeater69
why not? the ap reads boost from the stock MAP sensor electonically, it's about as acurate as it gets (up to about 18.3 when it stops reading of course).

is this true? ive gotten the jist from reading on here that the ap boost gauge isnt worth a darn.
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Old 07-03-2006, 10:12 PM   #13
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the AP doesn't have a boost gauge. It has a display that shows the car's own internal gauge.
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Old 07-04-2006, 02:27 AM   #14
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Quote:
Originally Posted by nhluhr
the AP doesn't have a boost gauge. It has a display that shows the car's own internal gauge.
so........... is it, say, more or less accurate than a regular boost gauge. (regular meaning like the stock mechanical one)
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Old 07-04-2006, 05:18 AM   #15
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Quote:
Originally Posted by tkarabian
So I just got a Cobb AP for my 04 wrx. It's stock except for a catback. I flashed my ECU with the Stage 1 CA 91 base map. I used the AP to read my boost levels, and the highest I saw was about 13.7 psi. I did a few third gear and 4th gear pulls and thats the highest number I saw. I didn't notice a huge improvement in performance like I was expecting, but maybe it's because I'm not boosting enough? I thought a stock WRX should be boosting around 16 psi.

So, where should I start looking to fix this problem. Thanks
You need to adjust the waste gate actuator on the back of your turbo. If you aren't reaching target boost, then the actuator arm has too much slack in it. Adjust the arm with 2-4 clockwise turns.
This thread has information that you may find vital.
Wastegate Actuator Adjustment
READ THIS INFORMATION VERY CAREFULLY BEFORE USEING IT!!!!!!!!!
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Old 07-04-2006, 05:53 AM   #16
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I wouldn't mess with the waste gate actuator until you KNOW that is the problem. It is too early for that. Over the last few years, many of the people who have tried to adjust theirs end up going back to stock with it in the end. It just seems to create problems.
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Old 07-04-2006, 08:19 AM   #17
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Quote:
Originally Posted by Satans_Rectum
You need to adjust the waste gate actuator on the back of your turbo. If you aren't reaching target boost, then the actuator arm has too much slack in it. Adjust the arm with 2-4 clockwise turns.
This thread has information that you may find vital.
Wastegate Actuator Adjustment
READ THIS INFORMATION VERY CAREFULLY BEFORE USEING IT!!!!!!!!!

NO!!!!!!!! not yet. give it time to learn...you are only .5 psi away from target.
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Old 07-04-2006, 09:22 AM   #18
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1, you are running it on the 91 octane map. do you have access to better gas ?
2,you should definately be feeling a differance no matter what . although it should get better as the ecu learns try the vishnu ecu reset for timing advance .
3, your expectations of what stage 1 were mostlikely too high
4, you could allways try the HWG map from cobb
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Old 07-04-2006, 12:49 PM   #19
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Quote:
Originally Posted by rotaman
so........... is it, say, more or less accurate than a regular boost gauge. (regular meaning like the stock mechanical one)

Given your stock MAP sensor is in working order, the AP read out of live boost WILL BE more acurate than a mechanical boost gauge.
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Old 07-04-2006, 12:57 PM   #20
geargrinder
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you are running the "CA 91" map. I think that Cobb lowered the boost levels for the California maps. I am running Cobb CA stage 2, My car (06 WRX) spikes at around 14psi, seems to be a consistent 13.4psi otherwise.
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Old 07-05-2006, 11:32 PM   #21
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I have an 03 stg 1 91 CA map, my AP reads 14.5 psi. My manual boost gauge reads a hair over 15 psi. But I was getting some boost creep while stock, probably due to the exhaust... (3" borla cat back, IC hoses, pulley, 0 ga wires, stock box W/snorkal)
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Old 07-06-2006, 09:01 PM   #22
WrxSlvrWgn
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Make sure you have reset your ecu using the AP at least once and then let it learn doing a few 3 gear pulls. Use your foot on the brake if you need to get the boost maxed w/o gettting up to high reckless speeds. Unless you have a very safe place to run. Try not to get into boost after resetting your ecu until your get to do the 3rd gear pull up to redline if possible. Be safe use a friend to watch boost if you have no gauges
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