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Old 06-13-2005, 11:06 PM   #1
Predator3
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Default stage 2 target boost?

I just got my upipe and downpipe installed today and i programmed my AP stg2 map and in 2nd and 3rd gear i hit 14.1 and in 4th i hit 14.4 and 5th i hit 14.8.

Aren't these numbers a little low? Is it because it's only my first day being stage 2 and it needs to adapt? What should my target boost be?

Thanks
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Old 06-13-2005, 11:23 PM   #2
WRX-CBR
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Usually yes. About 100 miles or so. I know someone else on here had the same problem. Maybe he can help.
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Old 06-13-2005, 11:27 PM   #3
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Have you tried the vishu reset? Everytime I reflash the ecu I do the vishnu reset and my AP programs perform EXACTLY the way cobb says they should. 16.5 is target.
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Old 06-14-2005, 01:26 AM   #4
willguidry
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Predator....I see you are running the 05 WRX. Spoke with Cobb, and they said alot of the 05 WRX's wastegate pre-tension is what is limiting them from reaching target boost.

See this thread I started.

http://forums.nasioc.com/forums/showthread.php?t=781443

Sounds to me your having the same issue. Don't bang your head. Pull the heatshield, mark the wasgate arm nut and arm with a sharpie, then make two full rotations shortening the arm.

That put me around 15.8PSI.

I'll probably give it another half turn or full turn to make it a full 3 x 360 turns.

Let me know if you need anymore help!
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Old 06-14-2005, 02:57 AM   #5
Predator3
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so do u guys think that i should do the vishnu reset first? And if doesn't reach target boost i should try adjusting the wastegate arm?

Thanks a lot for the responses.
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Old 06-14-2005, 03:07 AM   #6
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give your ecu about a week or so. if you're still not hittin target boost try the wastegate arm adjustment or the hwg map at your own risk.....

Last edited by Bishop; 06-14-2005 at 11:15 AM.
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Old 06-14-2005, 10:26 AM   #7
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Been having the same trouble, except, I've only seen 13.5 psi... and that was only peaking for a second.

I know I don't have a fully open turbo back exhaust; in fact I still am stock from the 3rd cat. back, but there has to be something I can do.

I don't want to get a new cat. back exhaust system because I really want an electronic cut-out. In the mean time, is there anything I can do to hit target boost?
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Old 06-14-2005, 10:35 AM   #8
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Quote:
Originally Posted by WRXXXual
Been having the same trouble, except, I've only seen 13.5 psi... and that was only peaking for a second.

I know I don't have a fully open turbo back exhaust; in fact I still am stock from the 3rd cat. back, but there has to be something I can do.

I don't want to get a new cat. back exhaust system because I really want an electronic cut-out. In the mean time, is there anything I can do to hit target boost?
Assuming you're running AP Stage II, you could give the alternative Stage II map a try. They're made for people just like you that have trouble hitting target boost.
On a side note, I am always curious why some cars have trouble reaching the target level while others experience no such problems. I have a hard time believing that manufacturing tolerances produce such a wide range of behavior. Was the car always under target boost even from factory?
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Old 06-14-2005, 11:23 AM   #9
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Ziggyrama thanks for your response

To answer you last question: I don't know.

I am running a QTP equal length header with an integrated UPpipe, and a bosal Div. wastegate DOWNpipe.

Also, I'm currently using the ver 1.3 93 octane stage two map.

are there any ill affects of using the HWG 93 octane stage II map?
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Old 06-14-2005, 11:44 AM   #10
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Well....I really think since the stock PSI is 13.5, it would make sense for the factory to have the wastegate arm adjusted to that pre-load to prevent spikes etc.

I'd download the HWG stage 2 map first....try that out. I know it's going to be your wastegate pre-load...but better be safe than sorry.

PLEASE. monitor your boost with the AP CAREFULLY. If for some reason, it's NOT your pre-load....you can and WILL boost over 17 to 18PSI and up.

So drive cautiously..watching the PSI as you push the car. If you go over 16PSI stop.

If not, and your still hitting the same numbers +/- .5 then it's your wastegate.

Adjust, and be happy.

Again, let me know if I can help you out anymore.
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Old 06-14-2005, 11:44 AM   #11
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By the way, how are you reading the boost? Using AP or some other device?
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Old 06-14-2005, 11:47 AM   #12
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Oh also....make sure you put the Stage 2 mapping back on your car removing the HWG map before you go test drive the wastegate changes you made.

If not, it will have no limit set by the ECU and boost until the wastegate dumps it. Which, if you shortened the arm by too much, could be 18-19PSI...

And that is no good. Well..
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Old 06-14-2005, 11:55 AM   #13
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Quote:
Originally Posted by Ziggyrama
By the way, how are you reading the boost? Using AP or some other device?
I'm most deff. using the live boost reading from the AP. I'm not stupid enough to trust the factory boost gauge!

I installed the AP last Friday morning, and I figured I should start seeing 16.5 +/- .5 psi by now That not withstanding, I have noticed a HUGE difference in the car already, and I can't wait to get it to target boost!

Thanks for the advice gentlemen, I will certainly use it.
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Old 06-14-2005, 12:22 PM   #14
spacenut999
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Target boost for stage II 93 Oct is 15.8 +/-.5
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Old 06-14-2005, 03:12 PM   #15
Predator3
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i turned the arm 2 times and im at 14.0 in 2nd and 14.4 in 3rd, does this sound right? Is the 15.8 target for all gears?
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Old 06-14-2005, 03:45 PM   #16
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why is the HWG map "use at your own risk?"
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Old 06-14-2005, 03:45 PM   #17
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No. for 4th and 5th

what did you hit for those?
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Old 06-14-2005, 03:45 PM   #18
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Quote:
Originally Posted by mistaare
why is the HWG map "use at your own risk?"
Because that map tells the ECU to run boost as high as the wastegate will hold.
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Old 06-14-2005, 03:51 PM   #19
Predator3
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OK i my wastegate arm is turned at 3X360 turns in and in 2nd i'm at 14.4, 3rd at 14.8, 4th at 15.2 and 5th at 15.3 with a spike at 15.6

Should i do another half turn (180)?

Thanks

BTW i did the vishnu reset after every time i changed the wastegate arm legnth
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Old 06-14-2005, 03:55 PM   #20
willguidry
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Hmmm Just keep dialing in till you hit target boost. I mean...your right there.

Do one more turn and post your findings.

You are doing this with the Stage 2 map right? Not the HWG map...
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Old 06-14-2005, 03:59 PM   #21
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Quote:
Originally Posted by willguidry
Because that map tells the ECU to run boost as high as the wastegate will hold.

Thank you for answering that!
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Old 06-14-2005, 04:11 PM   #22
Predator3
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yea i'm doing it with the Stage 2 map, If i did the HWG i would have put it back to normal.
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Old 06-14-2005, 04:11 PM   #23
willguidry
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And?

Are you hitting target?
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Old 06-14-2005, 04:18 PM   #24
Predator3
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BTW what do you guys read in 2nd and 3rd gears?
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Old 06-14-2005, 04:25 PM   #25
willguidry
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Depends...anywhere from high 12's to low 14's (3rd)....but mine is still tweaked.

I need to get back in there and do another "adjustment"
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