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Old 03-26-2012, 06:05 AM   #1
BackflipJeff
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Member#: 291485
Join Date: Aug 2011
Chapter/Region: AKIC
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2007 Wrx wagon
Satin white

Default Needing some advice.

I have an 07 wrx that has full catless exhaust Cobb intake on cobbs stage 2 tune and am overboosting by 3.4 psi to be exact only wot in 4th and 5th ill go about 2 psi over in 3 wot as well. But the advice I got from Cobb is those results I took the vaccum line with the boost pill and ran just a open line instead to hopefully under post with no restrictions but all it did was make my over boost alil less worse. Does anyone know of any way to fix this besides a new tune? Really not tryin to spend 300 bucks because of an overboosting problem am willing to do other mods to level it out whatever will work. Plz and thank you .
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Old 03-26-2012, 10:29 AM   #2
Quasimodo_ak
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I had a similar problem. Have you tried the LWG stage 2 map they have on the Cobb site? That seemed to have solved my over boosting problem.
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Old 03-26-2012, 12:38 PM   #3
Tripster
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Yea try the LWG map and see how that works for you. I over boost as well. The LWG map helped but didn't eliminate my issue. You could look into a GrimSpeed EBCS but you need to have your tune tweaked for it.
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Old 03-26-2012, 01:39 PM   #4
Quasimodo_ak
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Quote:
Originally Posted by Tripster
Yea try the LWG map and see how that works for you. I over boost as well. The LWG map helped but didn't eliminate my issue. You could look into a GrimSpeed EBCS but you need to have your tune tweaked for it.
That is true. I failed to mention that it didn't eliminate the problem completely but only helped out. I am going to look into what you said Tripster.
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Old 03-26-2012, 06:03 PM   #5
P3Auto
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AWD Dyno, Mods, etc

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Bring it by some time, I will dial it down for $50
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Old 03-26-2012, 09:38 PM   #6
Quasimodo_ak
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Rallysportdirect told me also that if I had a hi-flow catted dp that the boost creep would not be an issue.
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Old 03-26-2012, 10:03 PM   #7
Tripster
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Quote:
Originally Posted by Quasimodo_ak
Rallysportdirect told me also that if I had a hi-flow catted dp that the boost creep would not be an issue.
Hmmm. I have a Catless DP and I still have Boost Creep even with a LWG map.
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Old 03-26-2012, 11:26 PM   #8
Quasimodo_ak
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Quote:
Originally Posted by Tripster

Hmmm. I have a Catless DP and I still have Boost Creep even with a LWG map.
My fault. I pm'd P3 the gist of my issues. I called rallysportdirect and asked them if I got the grimmspeed EBCS how I would get a tune since they (grimmspeed.com) recommended it be professionally done by a dyno tech. Since I'm in Fairbanks that was obviously not going to be the case. The guy then recommended PDXtuning.com by way of E-tune.

Matt also told me that the accessport stage 2 map was designed for a catted hi-flow dp and that the obvious best match up would be the catted hi-flow Cobb dp. So I basically was told either sell my catless dp and purchase a catted one, or I could do an E-tune with or without the grimmspeed EBCS so that they could tune specifically for the boost creep issue I'm having.

No WOT for me until I get the funds to E-tune lol.
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Old 03-26-2012, 11:40 PM   #9
Quasimodo_ak
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Also sorry for thread jackin : (
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Old 03-27-2012, 06:06 AM   #10
BackflipJeff
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Thanks guys and p3 if that's you Seth I will try to come by soon that would be perfect and I hears about doing a boost controller to help it but like you said tune tweak as well I was told today by a buddy that I could possibly do it by lossening my waste gate relief flange I guess allowing it to open and lower pressure so the boost creep doesn't over build I guess idk I'm still kinda. We at this but that's what I was told and yea Cobb pretty much said that's what I get for not buying their **** I was kinda pissed when they didn't wanna help but thanks I'll look into the lwg map.
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Old 03-27-2012, 06:13 PM   #11
P3Auto
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Boost creep by the way is when your wastegate cannot vent enough of the exhaust away from the turbo. Boostcreep is when boost builds higher and higher towards redline. The only way to fix true boost creep is to fix the physical issue. Larger wastegate (ported), or external waste gate.

Based on you description you are overshooting targets so you need to lower your wastegate duty cycles or at least initial duty cycles...The LWG map does this.. The idea of removing some wastegate pre-tension may help a little to ease spikes but it may also make things worse for other reasons...try it its worth a try.

As temps go up outside you may find your issues eases a bit as well.
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Old 03-28-2012, 07:41 AM   #12
BackflipJeff
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Alright thanks and I will note that it's only 4th and 5th that I go over my limits and in 4th its only after 5000 rpms and in 5th wot it doesn't even hit the over boost till I hit 100 mph which is like 4000 to 4500 rpms so idk but I was gonna try to release some pre tension thus what Paul and Henry suggested before anything else.
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Old 03-28-2012, 02:28 PM   #13
P3Auto
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AWD Dyno, Mods, etc

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What your describing sounds like boost creep. Although I cannot say for sure without seeing the problem first hand I would say that since the wastegate (should be) wide open at that point removing tension will do nothing for your problem unless the gate is not opening all the way.
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Old 03-28-2012, 02:46 PM   #14
AKGC8
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Pull the turbo and port it yourself, its pretty easy. The original wastegate port on my VF39 was jacked up. You'd think it would have been cut out by a machine and be a perfect circle, but the edges were all jagged like a little kid cut it out by hand. I slightly enlarged and smoothed out the hole and rounded the upstream side of the inner lip. It's like a 5 minute job once you get the turbo off.
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Old 03-29-2012, 03:05 AM   #15
BackflipJeff
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Well p3 if your not to busy this weekend I'll come up cuz I wanna get this figured out before autocross starts and also so I can have full potential to my car.
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Old 03-29-2012, 03:10 AM   #16
Alaskan EJ20
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if you have a computer and have the Access tuner race software that cobb provides to you via the web i can help you if you want to do some pulls tomorrow.
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Old 03-29-2012, 02:52 PM   #17
P3Auto
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2014 P3 Import Auto
AWD Dyno, Mods, etc

Default

If you decide to use us please call or text 907-355-6655 and make an appointment. Tuning season is here and we are quite booked up. We can get you in this weekend and at least properly figure out what is going on and how to fix it exactly.

Thanks!

Quote:
Originally Posted by BackflipJeff View Post
Well p3 if your not to busy this weekend I'll come up cuz I wanna get this figured out before autocross starts and also so I can have full potential to my car.
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Old 03-30-2012, 07:45 AM   #18
BackflipJeff
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Satin white

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To Alaskan ej, I have access tuner race I deffinetly be willing to have some help if p3 can't get me in this weekend I'll let you know thank you.
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