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Old 10-07-2010, 10:37 PM   #1
furburger
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Default 2009 WRX Boost Creep issues...

Hello, I have been researching and trying to find answers. It seems like a lot of opinions are on the fence about the issue. Let me explain...I have a 2009 WRX 5 Door. Currently it is only Stage 1. I was looking to go to stage 2. I was looking to purchase an Invidia Catless DP and keep my STOCK catback. My question is: Is having the stock catback with the catless DP enough to prevent the possibility of boost creep? I understand that the VF52 has a mechanical boost creep that cant be tuned out...EWG and Wastegate porting is out of the question as of right now...I would be running this set up with EM of course.

Thank you for the help and opinions.

p.s. I was planning on keeping the stock catback from here on out on the vehicle. I figure the price of a catback can go towards other parts. To me the catback is good for the sound and minimal gains.
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Old 10-08-2010, 12:01 AM   #2
usfsfire42
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my friend has a wagon also same year with an invidia catless dp and invidia n1 race exhaust and he got it tuned and doesnt have any problems that we noctice with boost creep,he also has an aem intake and grimmspeed boost controller. the boost leves dont spike or anything i think with a good tune you can mitigate this issue fairly well
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Old 10-08-2010, 11:07 AM   #3
Mr. Fancypants
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nice name lol! Definitely use EM and should be good with the stock catback. Just make sure to keep an eye on the boost guage/Accessport monitor etc.
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Old 10-08-2010, 02:43 PM   #4
Spec7
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What is EM? (Please excuse my ignorance)

I have a Cobb catted downpipe fitted to the stock exhaust on my '09 sedan. The
consensus on the Cobb forums seemed to be that this was fine, but your post concerning boost creep kind of concerns me.

Didn't have much luck with a google search, it actually came right back to this post. Could the OP or someone else elaborate on the concern please?
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Old 10-08-2010, 02:46 PM   #5
CenCalWRX
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EM if I'm correct stands for engine management.. Like a Cobb Access port.. Or a different pro-tune
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Old 10-08-2010, 05:13 PM   #6
Spec7
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Ahhh. That makes sense, thank you.
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Old 10-08-2010, 05:23 PM   #7
GrimmSpeed
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Boost creep should not be so bad on this, maybe the Nasioc'ers scared ya a bit but if it does become an issue I know you said you were not ready for EWG and porting but you can do just porting on just the hot side and not have to re-tune, and it will help with any creep. You don't need to run an EWG to have it ported but either way going stage 2 you should look into an aftermarket BCS boost control solenoid and a good solid tune!

Will
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Old 10-08-2010, 07:17 PM   #8
economan
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WHY? Why would you want to increase your turbo flo with a modified down pipe into a stock exhaust? I don't get it.
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Old 10-08-2010, 10:00 PM   #9
synolimit
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the stock exhaust can handle a good amount of power being 2.25" or 2.5". its the cats that are hurting stuff so you can replace the DP and still get power out of the CBE till your up above 300ish.
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Old 10-09-2010, 02:22 PM   #10
furburger
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Thank you for the help guys! I do hear that the boost creep is a real issue in 4th and 5th gear at the higher rpms...Im happy to know that I can port my waste gate and not need to retune. And as for the catback...5-10hp to me isnt worth it as of right now...keeping the stock look/sound but with a increase in the overall performance is what I am after as of now...my thought of keeping the stock exhaust (2.5") would keep some back pressure on the waste gate and minimize the possibility of boost creep. Im not in a position as of now to get a boost controller or a protune. I didnt know if when I do get the protune if the tuner can lower the waste gate duty cycle if boost creep is still an issue...Thanks again!
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Old 10-09-2010, 04:40 PM   #11
Jakubgt
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Quote:
Originally Posted by furburger View Post
Thank you for the help guys! I do hear that the boost creep is a real issue in 4th and 5th gear at the higher rpms...Im happy to know that I can port my waste gate and not need to retune. And as for the catback...5-10hp to me isnt worth it as of right now...keeping the stock look/sound but with a increase in the overall performance is what I am after as of now...my thought of keeping the stock exhaust (2.5") would keep some back pressure on the waste gate and minimize the possibility of boost creep. Im not in a position as of now to get a boost controller or a protune. I didnt know if when I do get the protune if the tuner can lower the waste gate duty cycle if boost creep is still an issue...Thanks again!
Full catless TurboXS TBE flashed with cobb stage 2 maps. 4th & 5th had issues with creep pretty bad. I ended up taking the downpipe off and flashed to stage 1. Some other users have had issues with their VF52 and a catless TBE setup.

This spring I plan on getting protuned at P&l and adding a GM 3-port boost solenoid. If that doesn't cure my creep, i'll either add a cat or just go with an EWG setup
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Old 10-09-2010, 04:58 PM   #12
thatkhmer
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Correct me if i'm wrong, but after the downpipe isn't it mostly just free flowing air and too much back pressure anyways? so keeping the stock catback wouldn't be restrictive really correct?

btw when i was getting tuned for stage 2 and CAI by Naji (road tuner) my stock map was overboosting to 17psi, when it shouldve been at 12.9 psi, at 4500 rpms i believe. At least thats what naji said
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Old 10-09-2010, 05:27 PM   #13
Studebaker83
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When I did my researched before buying my downpipe I found going catless is the primary reason for boost creep with the 08+s.
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Old 10-09-2010, 06:01 PM   #14
baba0023
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Quote:
Originally Posted by Studebaker83 View Post
When I did my researched before buying my downpipe I found going catless is the primary reason for boost creep with the 08+s.
^. i bought catted for that reason
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Old 10-09-2010, 06:09 PM   #15
Studebaker83
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Quote:
Originally Posted by baba0023 View Post
^. i bought catted for that reason
Me too
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