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Old 07-28-2012, 06:38 PM   #1
Subie22
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Member#: 133355
Join Date: Nov 2006
Location: Moscow, PA
Vehicle:
06 WRX Limited
SGM

Default Data Logs (Boost Oscillation)

Alright so I finally decided to data log my car. I've been experiencing boost oscillation and not always hitting peak boost. If anyone can help, I'd appreciate it!

2006 WRX

First map is a simple 2nd and 3rd gear normal driving pull to show the boost oscillation.
https://docs.google.com/spreadsheet/...pSEpaT0E#gid=0

Second is a pull from around 2.5k up to red.
https://docs.google.com/spreadsheet/...EcW1VNEE#gid=0

Third is the idea as the second.
https://docs.google.com/spreadsheet/...lTGlqUnc#gid=0

Like I said, any help is appreciated.
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Old 07-29-2012, 10:55 AM   #2
Cobb Tuning
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Join Date: Mar 2001
Location: Austin, DFW, Portland, SOCAL
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Quote:
Originally Posted by Subie22 View Post
Alright so I finally decided to data log my car. I've been experiencing boost oscillation and not always hitting peak boost. If anyone can help, I'd appreciate it!

2006 WRX

First map is a simple 2nd and 3rd gear normal driving pull to show the boost oscillation.
https://docs.google.com/spreadsheet/...pSEpaT0E#gid=0

Second is a pull from around 2.5k up to red.
https://docs.google.com/spreadsheet/...EcW1VNEE#gid=0

Third is the idea as the second.
https://docs.google.com/spreadsheet/...lTGlqUnc#gid=0

Like I said, any help is appreciated.
That doesn't look bad at all - especially the WOT pulls. You can try loosening the wastegate arm a bit (there are various tutorial threads on this on Nasioc) to see if that helps. Are you feeling the oscilliation at all as far as driveability?

Bill
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Old 07-29-2012, 01:31 PM   #3
Subie22
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Member#: 133355
Join Date: Nov 2006
Location: Moscow, PA
Vehicle:
06 WRX Limited
SGM

Default

Bill,

The oscillation is extremely noticeable when it's present. It will eventually level out after about 3-4 surges, but passing someone could be quite interesting at times. Is it possible an exhaust leak could cause this? Would I benefit from your 3-port ebcs?

-Dom
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Old 07-30-2012, 09:40 AM   #4
Cobb Tuning
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Originally Posted by Subie22 View Post
Bill,

The oscillation is extremely noticeable when it's present. It will eventually level out after about 3-4 surges, but passing someone could be quite interesting at times. Is it possible an exhaust leak could cause this? Would I benefit from your 3-port ebcs?

-Dom
I would reflash the fuel economy map as a test. This will disable boost control and allow you to see if the oscillation still occurs in this case. If it does, it may indicate a mechanical issue. May not be conclusive if it doesn't do it then, but at least worth a try.

Bill
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Old 07-30-2012, 03:20 PM   #5
Subie22
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Join Date: Nov 2006
Location: Moscow, PA
Vehicle:
06 WRX Limited
SGM

Default

Reflash the real time map, correct?
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Old 07-30-2012, 05:20 PM   #6
Cobb Tuning
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Originally Posted by Subie22 View Post
Reflash the real time map, correct?
A real-time flash is fine for this particular test.

Bill
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Old 07-30-2012, 10:43 PM   #7
capelani06
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Member#: 190859
Join Date: Oct 2008
Chapter/Region: SWIC
Location: Greenville, SC
Vehicle:
03 wrx
silver

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I Recently replaced my stock wrx TMIC for the STI TMIC and ran a data log. not sure what to make of it. I'm running the stock turbo with a catless turbo back exhaust, CAI, and BOV on the stage 2 93oct map from cobb version3.10

Last edited by capelani06; 07-30-2012 at 10:44 PM. Reason: .
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Old 07-31-2012, 10:08 AM   #8
Cobb Tuning
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Join Date: Mar 2001
Location: Austin, DFW, Portland, SOCAL
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Originally Posted by capelani06 View Post
I Recently replaced my stock wrx TMIC for the STI TMIC and ran a data log. not sure what to make of it. I'm running the stock turbo with a catless turbo back exhaust, CAI, and BOV on the stage 2 93oct map from cobb version3.10
Best thing to do is to get a data log as described in the video below (if you can do so safely). You can post the log at google docs (make sure to convert it to google docs' format and set the permissions to public) and then link it here. Keep in mind that our OTS maps for the 02-05 WRX are only compatible with the Cobb SF or stock intake. Using other intakes may cause issues without a custom tune.


Bill
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Old 07-31-2012, 12:00 PM   #9
Subie22
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Member#: 133355
Join Date: Nov 2006
Location: Moscow, PA
Vehicle:
06 WRX Limited
SGM

Default

Quote:
Originally Posted by Cobb Tuning View Post
A real-time flash is fine for this particular test.

Bill
And this is why I keep buying your products. Talk about customer service.

Thank you, sir. I'll give this a try
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