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Old 01-08-2013, 07:43 PM   #1
holtwrx
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Default 06 wrx stage 2 boost spikes to 20 psi

not really sure what to do or where to go from here, but i just recently went stage 2 on my 2006 subaru wrx. I have catless turboback sr*s exhaust, k n drop in, and cobb ots stage 2 93 oct map. so whats happening is whem im in 4th or 5th gear my boost is spiking to 20.0 psi on the ap. just today it threw a p0244 code for waste gate solonoid performance. im getting a protune next week but is there something else i should purchase to help my situatio before i go. thanks
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Old 01-08-2013, 08:08 PM   #2
RoadKillDMD
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Sounds like you might be experiencing boost creep. To fix this, you either need to go with an EWG setup, or port your turbos IWG.
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Old 01-08-2013, 08:22 PM   #3
moonrider_99
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yes boost creep, most likely because of your catless downpipe. This cannot be fixed with a tune.
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Old 01-08-2013, 08:27 PM   #4
holtwrx
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would the grimmspeed ebcs with a tune help?
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Old 01-08-2013, 08:52 PM   #5
trev762
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Quote:
Originally Posted by holtwrx View Post
would the grimmspeed ebcs with a tune help?
The ebcs will help but your best bet with a catless dp is to go ewg.
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Old 01-08-2013, 09:05 PM   #6
holtwrx
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Thanks for the replies. i'm trying to wrap my mind around modding these cars. i just wanted a safe stage 2 wrx fun to drive, but still reliable.
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Old 01-08-2013, 09:21 PM   #7
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Its spiking to 20psi, thats not creep its a boost spike and its a tune issue. Creep would be if you were hitting like 14 or more psi at redline rather than just 12ish like a normal stage 2 tune.
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Old 01-08-2013, 09:28 PM   #8
holtwrx
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yes it jumps to anywhere from 18 to 20 psi initially at wot. Then falls back down to normal boost ranges throughout.
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Old 01-08-2013, 09:54 PM   #9
neg_matnik
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Quote:
Originally Posted by holtwrx View Post
yes it jumps to anywhere from 18 to 20 psi initially at wot. Then falls back down to normal boost ranges throughout.
Try downshifting. If you're in 5th/4th and the engine is below 3K RPM, downshift to 4th/3rd and then go WOT if you need to.
Going WOT in 5th/4th from lowish RPM significantly increases the chances for boost spikes especially when it's cold outside.
You could probably get that tuned out (basically compensating wastegate duty for cold temps).
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Old 01-08-2013, 11:10 PM   #10
holtwrx
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yea it only seems to happen when im in 4th or 5th at low rpms and go wot. I am having it tuned next week thinking about the grimmspeed ebcs before i go.
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Old 01-08-2013, 11:26 PM   #11
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Look for the pill. If you find one, just leave it in there in case your tuner needs it. Just easy on your right foot until after tune.
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Old 01-08-2013, 11:37 PM   #12
holtwrx
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Thanks found the pill. i guess i will just take it easy untill i can get to the tuner.
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Old 01-09-2013, 09:00 AM   #13
bmx045
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put a stock air filter in LIKE COBB STATES CLEARLY. free-er flowing intake allows more creep thus needing less wastegate duty cycle. OTS maps are not calibrated for this.
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Old 01-09-2013, 09:54 AM   #14
tuzzio
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You're clearly over boosting. Cold weather does this
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Old 01-09-2013, 10:14 AM   #15
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Advice for everyone:
  • Do NOT go WOT in 5th gear on the highway. Ever. You shouldn't be WOT in 5th gear unless you're going 130MPH. WOT at low RPM's and high gear puts a lot of stress on the motor, and is also very likely to overboost. Stop being lazy and downshift!
  • Get a real tune. The off the shelf tunes are OK, but they are never the best. If you're overboosting, then use the Low Wastegate Tune that COBB offers. But really, just get an actual tune.
There are 3 things that contribute to uncrontrollable (ie. no amount of tuning can fix) boost creep on these cars:
  1. Free flowing downpipe
  2. Free flowing intake
  3. Cold weather
Some cars seem OK with all 3 of these, but some will have issues with just 2, or even 1 of them present. The best thing to do is start by getting a real tune. If this does not help, you have 3 choices.
  1. External wastegate
  2. Port the internal wastegate
  3. Remove one of the free flowing intake/exhaust parts and put on something more restrictive
The last one is usually the cheapest (just put a stock part back on), but if you really want the best flow and still keep your boost control then something has to change in the stock internal wastegate system. Either it needs to be opened up, or you need to bypass it with and external wastegate. Both of these are pretty expensive and do require tuning.
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Old 01-09-2013, 03:49 PM   #16
Facelessdoodoobutter
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Quote:
Originally Posted by bmx045 View Post
put a stock air filter in LIKE COBB STATES CLEARLY. free-er flowing intake allows more creep thus needing less wastegate duty cycle. OTS maps are not calibrated for this.
Actually, this isn't entirely correct.. In the required equipment it does state that you should use either the stock air filter/box or the COBB SF intake.. However, in the additional notes section, its says "Additional modifications such as an upgraded panel filter, lightweight crank pulley, aftermarket uppipe, or
recirculating by-pass valve are still within the acceptable modifications for this calibration."

Not to stir anything, just constructive info correction..
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Old 01-09-2013, 03:59 PM   #17
bmx045
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those maps are specifying cobb sf intake maf scaling though. It's mind boggling how many people are posting with overboost CEL's and stuttering issues when they're using OTS maps with an aftermarket intake
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Old 01-09-2013, 05:24 PM   #18
jthatch12
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Even better idea, go hybrid EBCS and MBC setup. Can't overboost anymore
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Old 01-09-2013, 05:59 PM   #19
holtwrx
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Thanks for all the replies and advise.It hass been really cold on ohio lately. I have the appointment with the tuner next week. He suggested the grimmspeed ebcs before he tunes it.
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Old 01-09-2013, 08:06 PM   #20
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Quote:
Originally Posted by Leafy View Post
Its spiking to 20psi, thats not creep its a boost spike and its a tune issue. Creep would be if you were hitting like 14 or more psi at redline rather than just 12ish like a normal stage 2 tune.

when i went to stage 2 with mine it would spike up to 20+ also. I bought the GS EBCS and got a tune at a pro shop and it was fixed. Haven't had a problem since..... **knocking on wood**
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