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Old 08-17-2019, 01:36 PM   #1
Bo0stcreep
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Member#: 298745
Join Date: Oct 2011
Location: upstate ny
Default Knock sensor calibration

Good afternoon,

I've been running into a bit of an issue with false knock.
The car is a 2003 wrx with ej255 block and heads with the ej20 electronics.

I am using ATR to tune the car and was hoping someone had the knock sensor calibration table from a 04 - 06 sti, since I believe they use a 1 wire knock sensor.

I don't plan on plugging this in a running blind , just trying to rule out that as being an issue.
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Old 08-17-2019, 06:01 PM   #2
JSR84
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Last edited by JSR84; 08-17-2019 at 06:07 PM.
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Old 08-17-2019, 06:07 PM   #3
JSR84
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Default

Quote:
Originally Posted by Bo0stcreep View Post
Good afternoon,

I've been running into a bit of an issue with false knock.
The car is a 2003 wrx with ej255 block and heads with the ej20 electronics.

I am using ATR to tune the car and was hoping someone had the knock sensor calibration table from a 04 - 06 sti, since I believe they use a 1 wire knock sensor.

I don't plan on plugging this in a running blind , just trying to rule out that as being an issue.
Download a MAP for an 04-06 STI from Cobb and compare? Is the block built?

Last edited by JSR84; 08-17-2019 at 06:19 PM.
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Old 08-17-2019, 06:25 PM   #4
Bo0stcreep
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Default

Quote:
Originally Posted by JSR84 View Post
Download a MAP for an 04-06 STI from Cobb and compare? Is the block built?
First thing I tried actually, my version of ATR wouldnt allow me to open.

I rebuilt the engine using oem parts, nothing crazy but it is running looser bearing clearances and I did open up the ring end gap some.
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Old 08-17-2019, 06:31 PM   #5
JSR84
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Default

Quote:
Originally Posted by Bo0stcreep View Post
First thing I tried actually, my version of ATR wouldnt allow me to open.

I rebuilt the engine using oem parts, nothing crazy but it is running looser bearing clearances and I did open up the ring end gap some.
Got ya, I was going to suggest adjusting modifying the Threshold Adder Limits below 3500 to try and desensitize it, but if you're running stock pistons with a stockish PTW clearance then you shouldn't need to. Have you tried contacting Cobb? They might give you the data you need?
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Old 08-24-2019, 07:55 PM   #6
SkateAndDestroy
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Chapter/Region: Tri-State
Location: Red Bank, NJ
Vehicle:
2011 BMW 328i Xdrive
EJ255 02 WRX Wagon PSM

Default

If you still need help, let me know...had a similar setup, an EJ255 longblock from a 06wrx swapped into my 02 wrx. Was getting false knock around 5k and up if I remember correctly.
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