[zkadiwal2023]

Originally Posted by cobramite

Sounds good Man. Glad you are enjoying the JB4.
Please let us know how it runs on the higher boost level maps.

So guys I just logged Map 4 & 5 and sent them to terry. No issues even on map 5! It’s a complete monster on Map 5! I am running around 99-100 octane. Terry recommended not to go higher then map 3 if you are only using 93. But since I had some 104 octane race fuel I mixed in with 93 to achieve around 100 octane and it runs amazing on Map 5! If you don’t have race gas you can also put E30 but I am not a huge fan of ethanol because of the added maintenance that usually comes with running it. But so far no complaints only lots of smiles and amazing turbo sounds!

[tbolts1010]

Originally Posted by zkadiwal2023

So guys I just logged Map 4 & 5 and sent them to terry. No issues even on map 5! It’s a complete monster on Map 5! I am running around 99-100 octane. Terry recommended not to go higher then map 3 if you are only using 93. But since I had some 104 octane race fuel I mixed in with 93 to achieve around 100 octane and it runs amazing on Map 5! If you don’t have race gas you can also put E30 but I am not a huge fan of ethanol because of the added maintenance that usually comes with running it. But so far no complaints only lots of smiles and amazing turbo sounds!

I have an M60 and haven't gone higher than map2. I wonder if this would be the same situation with the M60.... I want more power!!

[T3PO]

FWIW I reached out to BMS about options for myself given the following: No modifications except a piggy back and limited to 91 oct fuel.

Here is the response I received:
Thanks for reaching out.

Many are installing the JB4 on an otherwise stock car, no worries there. You would install the JB4 fully / normally, I'll include the install guide below for your reference.

91 octane, you'll likely need to stick with Map1, but data logs will confirm 100%.

Any other questions, let me know.

JB4: https://burgertuning.com/products/s6...62035739&_ss=r
Guide: https://www.jb4tuned.com/instruction...tall-Guide.pdf
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Best,
Burger Motorsports Sales

Basically I will get a 3psi bump and have data logs which will determine if there is more potential. Most likely I will be limited to map 1, which I am totally fine with, however this is essentially the same increase as RC less any capacity for data logging. IMO the additional cost makes the JB4 a safer option with the ability to expand later if desired.

[RedATX]

My car has less than 1500 miles on it; read #cobramite comment saying was waiting until reaching 3,000 miles to install the JB4. I intend to keep pumping 93. Read some negative reviews about E30 performance drop (pressure). So I'm guessing the max tune in my case will be Map3...

😒 I want more 🐴💨 in my stable.... suggestions?

Please keep updating your experience with the device. Thanks

[bimmer813]

For anyone looking for this, I’m swapping out of my X5 xDrive40i and have this available. Paid $912 shipped, only used for about a month. I’d take $850 shipped OBO.

Car ran great, ran Map 3 on 93 octane. Burger Tuning has some of the best “tech support” and I will be getting a JB4 for my next car.

[RedATX]

Curious, if car runs well why are you removing the device?

[bimmer813]

Swapping out of my car, next car doesn’t use this model JB4.

[megabmw]

Anyone tried out JB4 on a LCI Hybrid 50e?

[bimmer813]

You can email Terry at BMS, he’s very responsive. Not 100% sure on this but I did have a friend running one on a 2023 45e and he was impressed with the difference.

[Nooch]

Originally Posted by megabmw

Anyone tried out JB4 on a LCI Hybrid 50e?

I’m interested as well. Would like to see the power difference on the 50e.

Also could we crank it up past Map2 on 93 being that the 50e has a lower base psi vs the 40i?

[bimmer813]

For anyone looking for this, I’m swapping out of my X5 xDrive40i lease and have this available. Paid $912 shipped, only used for about a month. I’d take $800 shipped OBO.

Car ran great, ran Map 3 on 93 octane. Burger Tuning has some of the best “tech support” and I will be getting a JB4 for my next car.

[O_que]

Anyone have draggy runs with the gen 3 motor on the JB4 I’m curious to see if this motor is that much more of an improvement since the TU.

[e92m3allday]

Originally Posted by O_que

Anyone have draggy runs with the gen 3 motor on the JB4 I’m curious to see if this motor is that much more of an improvement since the TU.

I’m going to buy the dragy and get some official numbers. Running JB4 on Map 5 with a 40i. I really have to say this thing is a monster and sometimes I can’t believe it’s as fast as it is. Via the JB4 app, the fastest 0-60 I’ve logged is 3.600 on the flattest road I was able to find. E85 blend.

Wish downpipes were made for this thing. I’ll keep posted if I get the dragy. I am currently considering upgrading to a X5M. But knowing how great this thing drives with springs + JB4, it’s really damn hard to justify the cost difference.

[O_que]

Originally Posted by e92m3allday

I’m going to buy the dragy and get some official numbers. Running JB4 on Map 5 with a 40i. I really have to say this thing is a monster and sometimes I can’t believe it’s as fast as it is. Via the JB4 app, the fastest 0-60 I’ve logged is 3.600 on the flattest road I was able to find. E85 blend.

Wish downpipes were made for this thing. I’ll keep posted if I get the dragy. I am currently considering upgrading to a X5M. But knowing how great this thing drives with springs + JB4, it’s really damn hard to justify the cost difference.

I’m gonna be getting the JB4 next just waiting to get some other things I need before hand. And hopefully XHP will be able to tune the trans too. I bet it’s crazy on e85, have you been sending logs to Terry and the guys ?

[Natemare13]

How safe is JB4 on the 2024 X5 40i? Is it something I could run daily without any concern what so ever (say on map 1)? and is it drivable for my wife too? What concerns me is the possibility of long term damage to existing computers and or engine as well as the JB4 unit itself having an error and leaving me on the side of the road or worse yet blowing up the engine due to some freak error. Also how is the reliability long term? Any increase in risk with the module running for 3+years?

If the JB4 drives like stock but feels like the car just has more HP when you lean into the pedal, and is safe, long term, and can still drive slow and smooth like stock when you are just putting around town, then I would be interested.

[Aussiejem]

Wonder if this JB4 can be installed on the 50e B58 TU2 hybrid unit...

[eluded]

It should be reliable if you have access to good fuel and the logs are clean. Few extra pounds should not harm anything You could void your warranty though.

Piggybacks do make me nervous vs a flash tune which is not possible yet on this motor.

Originally Posted by Natemare13

What concerns me is the possibility of long term damage to existing computers and or engine as