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      03-27-2017, 12:47 PM   #1
bNks334
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DIY: N20 TMAP - re-pin stock plug

The stock n55 TMAP is only good for reading up to 2.5bar (36.25 psi), which is the sum of both the barometric pressure reading (typically 14.1 to 15.1psi) and the pressure built up in the charge-pipe (stock 8psi to 21psi+). It is easy to see how the stock sensor is not ideal when pushing the limits of the stock turbo.

The answer is to move to a 3.5 bar (N20) TMAP or even a 4bar sensor. The problem is the stock plug fits into the N20 sensor upside down. You can either buy an adapter, or, you can re-pin your stock plug which is what I chose to do.

Sensor:
https://www.ecstuning.com/b-genuine-...r/13627843531/

The process is simple really:

1) Use something flat (screwdriver) to release the latch on the plug that holds the pins in place.
2) Use something like a paperclip or a thumbtack to release the pins.
3) Pull pins out of the plug.
4) Reinstall pins in reverse order.
5) Plug in your new N20 TMAP sensor.
6) Flash your new tune that is re-scaled to take advantage of an N20 TMAP (MHD for N55 has this option).

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Last edited by bNks334; 03-28-2017 at 10:46 AM.
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      03-30-2017, 12:00 AM   #2
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Nice, thanks a lot. Will be doing this shortly!
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      05-02-2017, 10:09 PM   #3
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does this work on the n54 as well?
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      05-04-2017, 08:41 AM   #4
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Quote:
Originally Posted by sgm.e90 View Post
does this work on the n54 as well?
No idea man. This is relevant to N55 Harness type A. Only noticed it because I bought the sensor before I bought the adapter and realized there so no need for the extra expense in the first place.
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      06-08-2017, 06:37 PM   #5
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is there any pros getting this tmap sensor if im running mhd 2+?
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      06-09-2017, 10:20 AM   #6
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Quote:
Originally Posted by OTN55 View Post
is there any pros getting this tmap sensor if im running mhd 2+?
I don't think Stage 2+ pushes more than 20psi so you have some headroom left with the stock sensor. Not clue if the "greater resolution" of having a higher reading sensor would provide any benefits or not...
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      07-18-2017, 12:27 PM   #7
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it works i tried it
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      07-18-2017, 11:36 PM   #8
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Quote:
Originally Posted by MMM335 View Post
it works i tried it
For the N54?
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      07-19-2017, 12:49 PM   #9
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^ re-pinned TMAP sensor, no need for burgermotorsports... just repin in reverse... saves $100
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      07-19-2017, 12:53 PM   #10
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Quote:
Originally Posted by sgm.e90 View Post
For the N54?
Yup
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      07-19-2017, 02:37 PM   #11
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Quote:
Originally Posted by MMM335 View Post
Yup
Glad to see this confirmed! I am shocked that no-one else has realized this in years of tuning this platform...
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      07-19-2017, 03:47 PM   #12
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as you can see their clearly just switched around the plug ends lol.
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      Today, 06:09 AM   #13
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MMM335

are you showing the location of where the pins go on the N20 TMAP? looks the same as OEM...
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      Today, 11:12 AM   #14
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Quote:
Originally Posted by sgm.e90 View Post
MMM335

are you showing the location of where the pins go on the N20 TMAP? looks the same as OEM...
It doesnt matter what the colors are. What matters is the pins are in the order of 1-2-3-4 and they need to be taken out and put back in in the opposite order 4-3-2-1. This only applies if your n20 sensor plugs in perfectly, but upside down (harness type A).

Label the wires yourself with some tape and a pen... No one can guarantee the wire color itself is the same across cars...
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