JB4tech.com - International Turbo Tuning Discussion
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Default N20 TMAP Sensor - 03-20-2012, 01:18 PM

Hey guys,

Finally got our N20 TMAP sensor in. By this point it's old news but the sensor goes up to 3.5 bar and is a direct swap for our 2.5 bar sensor. Required for large single turbo guys. To install it all you need is a connector adapter so the OEM connector plugs in along with a simple JB4 firmware update. We've added settings to the G5 ISO firmware to accommodate this sensor.

You can order the adapter harness on our upgrades page and for the sensor you'll need part BMW part 13627843531. You can order that from getbmwparts.com or your favorite BMW parts supplier.

When using a 3.5bar TMAP sensor you need to set "N20 TMAP" to 1 in the JB4 interface after installing it, and also realize your FF/duty bias values will be approx 20% lower than they were with the 2.5bar factory sensor. An easy way to offset this is by adding 20 to each duty bias value across the board to keep FF within a usable range. Also note with the 3.5 bar sensor in place the in dash boost gauge has been rescaled. It will now show 0-full is 0psi to your defined boost safety setting.
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themyst themyst is offline
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Default 03-20-2012, 01:26 PM

That BT board just got more valuable.


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stilov stilov is offline
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Default 03-20-2012, 01:52 PM

Is there any benefit for stock turbos meth+n2o on this?
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Default 03-20-2012, 01:59 PM

Nope.


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Default 03-20-2012, 02:27 PM

Lets see some RB guys do this and crank up the boost!


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Default 03-20-2012, 02:36 PM

This along with the JB4 BT board should allow them to really push the limits. I think up top the RBs are pretty close to maxed but I'm sure there is a lot more in the midrange to be had.


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Default 03-20-2012, 02:39 PM

Quote:
Originally Posted by Terry @ BMS
This along with the JB4 BT board should allow them to really push the limits. I think up top the RBs are pretty close to maxed but I'm sure there is a lot more in the midrange to be had.
I believe Cobb was getting 18psi with 70% WGDC at redline. Maybe another 1-2 psi at redline? There is power to be gained in the 5000-6000 RPM range though.


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Default 03-20-2012, 02:40 PM

Yeah maybe but remember more duty cycle = more back pressure = less advance. Sometimes more boost doesn't make more power. We'll just have to see what someone who is willing to risk the shortblock can do with em!


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Default 03-20-2012, 02:44 PM

Quote:
Originally Posted by Terry @ BMS
Yeah maybe but remember more duty cycle = more back pressure = less advance. Sometimes more boost doesn't make more power. We'll just have to see what someone who is willing to risk the shortblock can do with em!
Heh, won't be me. I'm perfectly content with that 21 peak tapering to 18. Even that map will be a ticking time bomb for my tranny.


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Default 03-21-2012, 10:39 AM

I had a few moments this morning so I hand built 6 of these bad boys. They are sure to become collectors items...

Anyway if you want one paypal $25 per adapter + $5 shipping USA, $10 shipping intl (first class) to orders@burgertuning.com. Be sure your address is included in the paypal or Eric will curse you.
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Default 09-23-2012, 06:52 PM

What is the part # for the actual 3.5 N20 TMAP Sensor


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Default 09-24-2012, 02:31 AM

Quote:
Originally Posted by davidrbixby
What is the part # for the actual 3.5 N20 TMAP Sensor


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Default 09-24-2012, 05:20 AM

13627843531


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Default 09-24-2012, 06:46 AM

Quote:
Originally Posted by themyst
Heh, won't be me. I'm perfectly content with that 21 peak tapering to 18. Even that map will be a ticking time bomb for my tranny.
You have a stock tranny, stock torque converter with RB's? I killed the torque converter, than the cluches in my tranny with out meth, n2o or RB's...


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Default 10-02-2012, 03:04 PM

T I'm going to order the adapter tomorrow. You want me to just Paypal and put n20 map adapter with shipping address in the comments on PayPal?


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Default 10-02-2012, 03:15 PM

That is fine!


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Default 10-02-2012, 03:15 PM

maybe a noob question but what is the jb4 bt board?
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Default 10-02-2012, 03:27 PM

Quote:
Originally Posted by WDBi
maybe a noob question but what is the jb4 bt board?
Haha its the g5 board. Terry started off calling it the BT (big turbo) board but everyone was thinking blue tooth and asking a bunch of blue tooth questions so it's called the g5 now lol


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Default 10-02-2012, 03:54 PM

ok yeah i thought it may be big turbo but just making sure.
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Default Anyone getting 2ABD error codes with this sensor? - 10-03-2012, 11:18 AM

Anyone getting 2ABD error codes with this sensor?

Installed it this morning and cars idles very rough, then shots off. Only in Map 8 will it idle correctly.

N20 Part # 13627843531 + Terry's harness


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Default 10-03-2012, 11:32 AM

It's not going to work without special firmware. Email in for it.


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Default 10-03-2012, 01:45 PM

if we do get special firmware from you for something like this, will it clear and be overwritten if we try to update to a newer firmware that you release on the sticky threads??


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Default 10-03-2012, 01:48 PM

Yes, it would be a big headache, having two versions of each firmware. So I just modified the G5 iso firmware such that you now set afr1500 to 1 to enable the 3.5 bar / N20 sensor. Any other setting assumes an OEM sensor. Since anyone running the 3.5 bar will also have our flash tuning these afr settings are no longer used on the JB4 end. And in the unlikely event someone wants to run a 3.5 bar without our flash only the 1500rpm setting is no longer available.


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It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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Default 10-03-2012, 02:22 PM

^Nice Good to know...

Thanks Terry


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Default 10-31-2012, 11:44 PM

Quote:
Originally Posted by Terry @ BMS
Yes, it would be a big headache, having two versions of each firmware. So I just modified the G5 iso firmware such that you now set afr1500 to 1 to enable the 3.5 bar / N20 sensor. Any other setting assumes an OEM sensor. Since anyone running the 3.5 bar will also have our flash tuning these afr settings are no longer used on the JB4 end. And in the unlikely event someone wants to run a 3.5 bar without our flash only the 1500rpm setting is no longer available.
I just paypaled you for the n20 adapter (getting RB's Sunday) and getting a flash tune the next month...should I hold off on the 3 bar N20 until I get the flash?


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