[Damirnuh22]

I just bought a 335xi N54 I'm new to the N54 and it already had jb4 with vsrf castles downpipes and cold air intakes , but I want to run mhd instead of jb4 and was wondering could I just run mhd straight up with jb4 already In or would I have to back end flash to run mhd only ? It would be greatly appreciated if someone would let me know thank you.

[Johnny Boost]

Originally Posted by Damirnuh22

I just bought a 335xi N54 I'm new to the N54 and it already had jb4 with vsrf castles downpipes and cold air intakes , but I want to run mhd instead of jb4 and was wondering could I just run mhd straight up with jb4 already In or would I have to back end flash to run mhd only ? It would be greatly appreciated if someone would let me know thank you.

Just remove the JB4 and install MHD. Don't over complicate it.

[E92only]

Originally Posted by Johnny Boost

Just remove the JB4 and install MHD. Don't over complicate it.

+1
Take the JB4 out and give it to your local museum.

[setterlee]

The JB4 is really attractive for all that promotion of safe function that protect your engine and all that stuff that let you play with the turbos and actuators...

The other think that make attractive the jb4 is if you have now stock turbos and in future want to go with single or hybrid turbos without spend extra money for tuning, the jb4 can cover you as well using the banckend flash that Burguer motorsport provide...

i was trying it for a couple of months and was ok but in my case i notice a rare behavior with the pedal, the settings lets modify the wastegate duty cycle and that cause a hesitation, I tried to fix that moving the WGDC settings in jb4 and nothing...

The other issue that I have now is an error communication with the water pump, the DME can't connect to the water pump and viceversa and the water pump is working in stand alone mode...

I removed the JB4 from the car now and I notice this:

1. The communication error for the water pump gone
2. The car have a smothest cold start. With the JB4 the cold start are more aggresive a i hear a lot of raspy sounds.
3. The rare behavior of the pedal gone

Theorycaly a Map direct to the DME is more than a piggyback, but the thinks that a mention at the start of my post can call the atention from many people...

I my case i prefer stay only with MHD and the OTS maps, if in the future change my turbos for hybrids or single, i will put extra money to get a custom map direct to the DME...

TLDR: in my opinion JB4 is like and Android phone with a lot of possibilities to customize and the mhd is like and iphone, solid as simple...

[Fuel-It!]

If you already have a JB4 there is no reason not to run it, it provides a lot of features and functions not possible flash only, and makes it easy to adjust your own tuning. Just use MHD to load their free back end flash maps. If you go flash only you're going to spend a fortune with the flash map packs, license, logging license, custom tuning, etc, and still won't match all the features the JB4 provides.

https://www.n54tech.com/forums/showthread.php?t=29236

[Damirnuh22]

I have dual cone intakes and a down pipe on my N54 I want to run mhd would I be stage 1 or stage 2 ?

[E92only]

Originally Posted by Damirnuh22

I have dual cone intakes and a down pipe on my N54 I want to run mhd would I be stage 1 or stage 2 ?

I suggest you upgrade your chargepipe because the stock ones are prone to breaking tune or no tune. I run a ER chargepipe for reference. Once you replace that I think you'll be good for stg 2. I personally wouldn't run stage 2 without an intercooler.

[Damirnuh22]

Originally Posted by E92only

I suggest you upgrade your chargepipe because the stock ones are prone to breaking tune or no tune. I run a ER chargepipe for reference. Once you replace that I think you'll be good for stg 2. I personally wouldn't run stage 2 without an intercooler.

Yea that was my next mod would be I good if I just run stage 1 then until I get a charge pipe ?

[E92only]

Originally Posted by Damirnuh22

Yea that was my next mod would be I good if I just run stage 1 then until I get a charge pipe ?

It's a pretty conservative tune so you should be good. Just don't lag on the chargepipe

[e92msport2013]

Do yourself a favor and get both. Used to just run JB4 and it was excellent, but the car had some hiccups. For instance you will almost never get consistent power in map 5. After installing the MHD with the JB4 backend flash the car is just something else. I wouldn't say more power, but damn it is just so consistent. Feels like a brand new car and you can adjust burble settings and even change the mapping for e85. And then you have the JB4 for on the fly changes. This is really the best way to go and worth every single penny. I'm actually not sure if you can run e85 with just the MHD I think you have to have the JB4.

Oh, and listen to the rest on a charge pipe! It'll blow one day, trust. Catless downpipes are also my recommendation, the car just feels so much better. I run catless with stock muffler and damn she sounds sexy. No too loud but when you go full throttle it just makes this sound that is ADDICTING

[Soden82]

I also recommend doing both, if anything the JB4 will control boost as well as control meth flow/ ethanol depending on your fueling needs. Plus the steering wheel controls and map switching on the fly is a great feature

[beetle6986]

Originally Posted by E92only

I suggest you upgrade your chargepipe because the stock ones are prone to breaking tune or no tune. I run a ER chargepipe for reference. Once you replace that I think you'll be good for stg 2. I personally wouldn't run stage 2 without an intercooler.

I must be lucky on the charge pipes. Mine are all stock. I've been tuned for 75k miles.

[Cranked_335i]

Hey there I just got a 2011 335i with the n55 and it has bms intake vrsf charge pipe and TILE bov and I’m thinking about getting the vest street or race catback exhaust. What time should I run or what other mods do I need before tuning, the engine also has 130,000 miles on it so should I consider replace other things before I tune ?

[Kevin39]

Tial bov on an N55?

I wouldn't get the exhaust, I'd get a catless downpipe instead depending on what type of emissions testing you have to pass.

I personally like MHD for tuning.

[Turbod]

Originally Posted by Cranked_335i

Hey there I just got a 2011 335i with the n55 and it has bms intake vrsf charge pipe and TILE bov and I’m thinking about getting the vest street or race catback exhaust. What time should I run or what other mods do I need before tuning, the engine also has 130,000 miles on it so should I consider replace other things before I tune ?

When looking at exhaust systems you're not going to gain power until you have a larger turbo and are moving a lot more air. At this point it will just be for sound and looks. MHD is the go to tuning option for your generation of N55.

If you know the maintenance history then just items that should be done around your mileage.

Chargepipe
Intercooler
downpipe
tune

[Tunafish]

Actual MHD has a few issues with the N55E or PWG engines.. The tune was not worked on like the n54 or n55 EWG and doesn't look like there will be any OTS map updates in the near future. While the tune is not bad you will have to deal with overboost/throttle closures which in my opinion going to shorten the life of the turbo and random error codes that can usually be cured by removing MHD and flashing back.

I can't speak for the JB4 myself but want you to know the n55e maps are a ruff draft and doesn't look like MHD have any plans to make a final on this platform anytime soon.. Check any n55 log with PWG and you will see the overboost and know the difference when you are looking at a n55 EWG map. You can't compare the two because they have different tunes/hardware..

[Johnny Boost]

Originally Posted by Tunafish

Actual MHD has a few issues with the N55E or PWG engines.. The tune was not worked on like the n54 or n55 EWG and doesn't look like there will be any OTS map updates in the near future. While the tune is not bad you will have to deal with overboost/throttle closures which in my opinion going to shorten the life of the turbo and random error codes that can usually be cured by removing MHD and flashing back.

I can't speak for the JB4 myself but want you to know the n55e maps are a ruff draft and doesn't look like MHD have any plans to make a final on this platform anytime soon.. Check any n55 log with PWG and you will see the overboost and know the difference when you are looking at a n55 EWG map. You can't compare the two because they have different tunes/hardware..

Get a custom tune. Problem solved.

[Tunafish]

Yeah pay 450 for a tune. Then pay another 450 for a tune.. Problem solved.

[Kevin39]

@cranked_335i I do have a used JB4 that might fit your car if you're interested. It's for an E series N55 PWG with the Type B connector

[Cranked_335i]

Originally Posted by Kevin39

@cranked_335i I do have a used JB4 that might fit your car if you're interested. It's for an E series N55 PWG with the Type B connector

Yes I would for sure

[Cranked_335i]

Originally Posted by Tunafish

Actual MHD has a few issues with the N55E or PWG engines.. The tune was not worked on like the n54 or n55 EWG and doesn't look like there will be any OTS map updates in the near future. While the tune is not bad you will have to deal with overboost/throttle closures which in my opinion going to shorten the life of the turbo and random error codes that can usually be cured by removing MHD and flashing back.

I can't speak for the JB4 myself but want you to know the n55e maps are a ruff draft and doesn't look like MHD have any plans to make a final on this platform anytime soon.. Check any n55 log with PWG and you will see the overboost and know the difference when you are looking at a n55 EWG map. You can't compare the two because they have different tunes/hardware..

I’ve seen that bm3 makes a n55 tune but I’m not certain if it would work for the car. I’ve used bm3 before and had a lot of friends use it so I’d prefer that if possible. Also I’ve never heard of that problem with MHD before? Did that happen to you while you used it ?

[Tunafish]

Yep.. And every n55 PWG MHD OTS log that i have seen thats not leaking boost.. But i havent had the random error codes.

For me its not bad because i rarely use that much boost..

One time it almost left me strained though.. Was headed to vegas right out of a town going to pass a car and put the petal down..i was monitoring at the time which i usually do.. And heard a pop.. Boost hit 21+ psi on a stage one (not plus) 91 ACN and blew the charge pipe off of the lower charge pipe.. I had no tools on me to connect pipes back together so limped it back to town.. Luckly i was only a few miles out..