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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > About to Start the N54 - MHD and scrap JB4?



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      11-14-2023, 03:35 PM   #1
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About to Start the N54 - MHD and scrap JB4?

It is more a FB rage than e90post, but lot of user telling me to go full MHD.

Now I have : MHD BEF with a base file for a single turbo, and I log, and get my boost target with JB4.
Pretty easy and cheap.

Car got a ST from speedtech, all 4 O2 with spacers.


1) Is it a good idea to -repay an other MHD license and remove JB4?

2) what are the cons to remove JB4? (had no issues on my TT setup). Right now I see the connectivity might be an issue, since JB4 is BT and MDH is wifi. Im using my phone has a hot spot.

3) Where I start with MHD ? Same thing, flash the base ST file and then log on MHD?
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      11-14-2023, 05:34 PM   #2
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Quote:
Originally Posted by oVeRdOsE. View Post
It is more a FB rage than e90post, but lot of user telling me to go full MHD.

Now I have : MHD BEF with a base file for a single turbo, and I log, and get my boost target with JB4.
Pretty easy and cheap.

Car got a ST from speedtech, all 4 O2 with spacers.


1) Is it a good idea to -repay an other MHD license and remove JB4?

2) what are the cons to remove JB4? (had no issues on my TT setup). Right now I see the connectivity might be an issue, since JB4 is BT and MDH is wifi. Im using my phone has a hot spot.

3) Where I start with MHD ? Same thing, flash the base ST file and then log on MHD?
Keep the JB4.. nothing wrong with an extra fail safe.. Are you running meth, PI? If you're port injected or planning on it just keep the JB4, if you go full MHD you'll have to invest in an AIC controller.
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      11-14-2023, 05:47 PM   #3
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meth kit can be controlled base on a boost target with a simple boost switch.

probably less efficient, and less safe since no fail safe...

Since the setup is there , I think Ill follow your advice, and if I ever have issues Ill try MHD only.
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      11-15-2023, 07:47 AM   #4
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If you run JB4 you are going to want to load their ST back end flash so you want to use MHD to load that AFAIK. I would sell the JB4 personally, but if you like it, keep it.

Most ST run flash only and a reflex or ss controller for PI. JB4 works for PI just fine. I would probably run my meth kit through JB4 if I were you as it has some safeties. Goto the JB4 forums and post there.

Last edited by Torgus; 11-15-2023 at 07:53 AM..
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      11-15-2023, 08:17 AM   #5
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Quote:
Originally Posted by Torgus View Post
If you run JB4 you are going to want to load their ST back end flash so you want to use MHD to load that AFAIK. I would sell the JB4 personally, but if you like it, keep it.

Most ST run flash only and a reflex or ss controller for PI. JB4 works for PI just fine. I would probably run my meth kit through JB4 if I were you as it has some safeties. Goto the JB4 forums and post there.
Ive the JB4 ST file from jb4tech, and Im on their forum.

simply on ST build I tend to see more and more people having issues, they dont figure why and get rid of jb4.

I made most upgrade to avoid issues, like gen3 hpfp, eldor coils, new 0.20 gapped ngk 2 step colder, pcv, carbon clean, all gaskets and 3x index12. Still need to source 3 other index 12, but damn this is almost the price of the drivetrain.
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      12-02-2023, 09:51 AM   #6
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Anyone know if the BEF MHD option got the ''single bank fuelling'' ?
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      12-02-2023, 11:46 AM   #7
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Quote:
Originally Posted by oVeRdOsE. View Post
Anyone know if the BEF MHD option got the ''single bank fuelling'' ?
When you go into options on the MHD app it should give you the single bank fueling option.
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      12-02-2023, 12:32 PM   #8
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Quote:
Originally Posted by SlowE92 View Post
When you go into options on the MHD app it should give you the single bank fueling option.
hopefully, I'm asking because my car is unplugged and I dont want to plug it back to check that.

I wanted to go OEM with 4x O2 sensor, but if there's no cons going single bank, it would be easier for me.
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      12-02-2023, 03:39 PM   #9
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Quote:
Originally Posted by oVeRdOsE. View Post
hopefully, I'm asking because my car is unplugged and I dont want to plug it back to check that.

I wanted to go OEM with 4x O2 sensor, but if there's no cons going single bank, it would be easier for me.
Are you running the JB4 and utilizing the free BEF? Or are you going full flash with MHD and using the JB4 as a boost controller? You have to flash the car with MHD either way and under the options it'll give you single bank fueling option.
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      12-02-2023, 04:18 PM   #10
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Quote:
Originally Posted by SlowE92 View Post
Are you running the JB4 and utilizing the free BEF? Or are you going full flash with MHD and using the JB4 as a boost controller? You have to flash the car with MHD either way and under the options it'll give you single bank fueling option.
for now the free file and it will be tuned by a tuner, street tune for next summer.

I've put more money that I should have already. Planning a very conservative tune for now, with the OEM lpfp.
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