JB4 + BEF (dyno results)

[black_sedan]

Very impressive numbers. Do we know the limits on our Piston heads and rods along with the limits of our trans?

I used to have a Scatpack charger making 900 wheel and my 8HP Trans which is the same we use, gave out on me.

the trans gets unhappy over 600tq. Ive seen downpipe + e50 tune cars start slipping 6th. So if you plan on going with a Pure turbo and port injection, the trans would be a wise investment. If you are doing digs on drag radials and prepped track, axles are a good investment also.

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[Loco38SUP]

Here is an excellent article on the JB4 and Back End Flash tunes.

-RJM

https://bmwtuning.co/bmw-b58-mhd-tuning-guide-info-hp-gains/

 

[whozaka]

Here is an excellent article on the JB4 and Back End Flash tunes.

-RJM

https://bmwtuning.co/bmw-b58-mhd-tuning-guide-info-hp-gains/

Thanks! Gonna read it this morning after the coffee hits me ?

 

[superd6199]

Does anyone know if the MHD BEF work on the locked A91 ECU along side with the JB4?

 

[black_sedan]

Does anyone know if the MHD BEF work on the locked A91 ECU along side with the JB4?

Nope. Back-end Flash, still requires the ECU to be flashed.

 

[absaifan]

Did you have to buy the MHD Super License in order to do the BEF?

I just got the normal flash lisence.

 

[absaifan]

Does anyone know if the MHD BEF work on the locked A91 ECU along side with the JB4?

Check with Terry at BMS

 

[Jfurby37]

Whats the "BEF"

Awesome I have the JB4 also running MAP3 currently. I have the EWG connector and Fuel It sensor waiting to go on.

You will not believe the difference once you add the EWG. Insane

 

[sstevens7]

You will not believe the difference once you add the EWG. Insane

How so? I have the JB4 With EWG connected, running Map 3. What is the EWG improving for me? I do not have a BEF yet but would like to find out how to do the BEF.

 

[absaifan]

How so? I have the JB4 With EWG connected, running Map 3. What is the EWG improving for me? I do not have a BEF yet but would like to find out how to do the BEF.

EWG can help maintain the "high" boost all the way to redline.
Without it, you will peak boost midway then start to drop to redline.
Get it, it's a must have for all the fun.

 

[sstevens7]

EWG can help maintain the "high" boost all the way to redline.
Without it, you will peak boost midway then start to drop to redline.
Get it, it's a must have for all the fun.

Other than just plugging in the EWG, is there anything in the app that I need to enable or is it plug and play?

 

[Jfurby37]

How so? I have the JB4 With EWG connected, running Map 3. What is the EWG improving for me? I do not have a BEF yet but would like to find out how to do the BEF.

I first had the JB4 without the EWG. When I connect it it allows the boost to be high and not get blocked by the ECU. For me it was a world of difference. Noticed right away. That and running E30. Whole new car.

 

[absaifan]

Other than just plugging in the EWG, is there anything in the app that I need to enable or is it plug and play?

I strongly recommend you go through the JB4 forums for files and threads if you are tuning it yourself. Just to stay safe.

 

[Supraman40]

New numbers on the Pure800 Turbo and JB4.
631whp / 769Tq

What other mods are you running?

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