[Mike@N54Tuning.com]

Originally Posted by ianthegreat

You think the JB3 was jumpy, try the JB2HH.. that was power the second you hit the throttle

LOL... That brigs me back.. The "Hot Pills"

Mike

[shaun02]

Originally Posted by Eracer76

I did ALL my mods by myself
The JB4 isn't that hard to do though, it should be easy for most people, especially with the good instructions and support you get from them!

Well the reason I ask is because I believe it has the tune already on it I just wanted someone to in depth show me how to use it and kinda set my car up. I got a chargepipe installed at vs motorsports and the guy that did it just told me to go on youtube to figure out how to use it so he wasnt very helpful lol..

[mo2566]

Thanks OP for the nice review.

[JesterEXW]

I know a lot of people have said this already but thanks for a great review, this is what the forums are all about! I am still trying to decide between all the options (PROceed, JB4 and COBB) and can't wait to pull the trigger.

[hellomyBMW]

Great review! +1 (Also like button)

Now I finally know which tune I should go with.
Thanks! But what does 15 ohms for JB4 do?

[slostjoe]

I have both together. The Cobb by itself just is not enough.

[E92GRL]

a little late, but thank you for writing that... very good to have something to go off of... got the JB4

[Eracer76]

Wow, this thread came back from the dead again!
I thought I was happy with the JB4 back then... but now Ive been running the G5 ISO with a 50/50 E85/93 mix and it is so much more powerful and so butter smooth! With the G5 ISO and the newest firmware, there is no comparison from when I first wrote this review, it really is that much better!

[Mautofied17]

This is awesome... I've been eyeing the JB4 ever since I've started looking at the 335i's.

[Eric335]

Really wish i had the G5 ISO!

[WhiteFury]

Does the jb4 stage one allow controls through the Idrive control? I wanted to get a tune but I am hearing the jb4 is better and I also want the a tune that's reliable and doesn't mess the idle up and make the car drive like a drag car.

[idrift4wd]

Originally Posted by WhiteFury

Does the jb4 stage one allow controls through the Idrive control? I wanted to get a tune but I am hearing the jb4 is better and I also want the a tune that's reliable and doesn't mess the idle up and make the car drive like a drag car.

You control the JB4 with your steering wheel controls, which is even better.

Your idle will be fine and your car will drive like a normal car....a fast normal car. Just make sure your coils and plugs are in good shape or you will get misfires (This applies for all tunes)

[bigdaddycane]

the G5 and a Flash (COBB or BMS) is the way to go.

[totalloss]

This is one of about the best threads I've read on N54 tuner topics, so I'd like to bump it a bit (so to speak). Anyway since this is about a two year old thread from the first post, what about reliability?

Are any of you long term JB4 users constantly needing to change plugs/coils, etc? How are the transmissions and other drivetrain items holding up? Turbos okay? Also wondering if there's evidence that the meth injection does anything to keep the intake valves cleaner (i.e. acting like a solvent)?

Thinking about installing a JB4 into my daily driver and want to be able to, well, drive it daily.

[WedgePerformance]

Originally Posted by totalloss

This is one of about the best threads I've read on N54 tuner topics, so I'd like to bump it a bit (so to speak). Anyway since this is about a two year old thread from the first post, what about reliability?

Are any of you long term JB4 users constantly needing to change plugs/coils, etc? How are the transmissions and other drivetrain items holding up? Turbos okay? Also wondering if there's evidence that the meth injection does anything to keep the intake valves cleaner (i.e. acting like a solvent)?

Thinking about installing a JB4 into my daily driver and want to be able to, well, drive it daily.

A lot has changed in the past two years. Flash tuning has come a long way and coming from the piggy world and stepping into the flash only was the best move I made. Making more power... Consistent Power...

All the maintenance items are still just that, maintenance... I think my turbos suffered more when I installed the piggy as they started to rattle the same day I installed it. Was able to get most of it out but just didn't like the onset lag. Removed the piggy and rattle was gone..

Meth seems to help as I cleaned my valves at 85k and they weren't as bad as most.

Regardless of what option you end up with, just remember to enjoy your car. At the end of the day, that's all that matter.

[totalloss]

Thanks Wedge!

[mike@x-ph.com]

Originally Posted by totalloss

This is one of about the best threads I've read on N54 tuner topics, so I'd like to bump it a bit (so to speak). Anyway since this is about a two year old thread from the first post, what about reliability?

Are any of you long term JB4 users constantly needing to change plugs/coils, etc? How are the transmissions and other drivetrain items holding up? Turbos okay? Also wondering if there's evidence that the meth injection does anything to keep the intake valves cleaner (i.e. acting like a solvent)?

Thinking about installing a JB4 into my daily driver and want to be able to, well, drive it daily.

Adding more power to your car will put the plugs/coils under more pressure no matter which tune you use (changing plugs once every 1-2 years is a very small price to pay for the extra HP you get).
each tune has its pros and cons, just keep in mind that if you get a Cobb it is recommended to get it custom tuned to take full advantage of it (since Cobb maps are very conservative).

[canny714]

Originally Posted by Rob@Cobb

Out torque numbers tend to be higher giving the feeling that the power falls off. Our competitors tend to ramp power as the RPMs climb giving the feeling of pulling to red line.

I think you might be pleased with running the v400 mapping located here:
http://www.cobbtuning.com/BMW-Access...s/bmw/bmw-grid
Simply click on the BETA button.

Cheers,
Rob

Can I get access to the v400 maps? I'm running cobb and not feeling the power and considering the jb4 as well. Thanks

[rcstevens]

Reviving an old thread that I have looked upon numerous times since I began ownership of my 135i. This thread convinced me to give the JB4 G5 a shot. I had issues with mine (CEL almost every night, OBD II port would not work for inspection even in map 0, just strange things) so I ended up selling it and eventually ending up with an AccessPort V3. Most people don't have any issues with the JB4, but I found in my research that some cars just don't seem to "like" the piggyback and will give nothing but trouble with them. I guess mine is one of them (JB4 was re-installed probably close to 10 times to make sure everything was proper). I have never looked back from Cobb and I am even more satisfied with it on the 135i than I was with it on my previous Subaru. Currently on a Stage 1+ Aggressive and loving every bit of it. Well worth spending the extra money for in my opinion, too.

[Cloud9blue]

Originally Posted by rcstevens

Reviving an old thread that I have looked upon numerous times since I began ownership of my 135i. This thread convinced me to give the JB4 G5 a shot. I had issues with mine (CEL almost every night, OBD II port would not work for inspection even in map 0, just strange things) so I ended up selling it and eventually ending up with an AccessPort V3. Most people don't have any issues with the JB4, but I found in my research that some cars just don't seem to "like" the piggyback and will give nothing but trouble with them. I guess mine is one of them (JB4 was re-installed probably close to 10 times to make sure everything was proper). I have never looked back from Cobb and I am even more satisfied with it on the 135i than I was with it on my previous Subaru. Currently on a Stage 1+ Aggressive and loving every bit of it. Well worth spending the extra money for in my opinion, too.

Should have gotten the MHD app on android.

Same stuff but with more features and support and much cheaper than an AP Cobb is outdated on this platform and is no longer being actively supported.

[BQTuning]

Originally Posted by Cloud9blue

Should have gotten the MHD app on android.

Same stuff but with more features and support and much cheaper than an AP Cobb is outdated on this platform and is no longer being actively supported.

I want to clarify this as people will take it the wrong way which can be misleading unintentionally if that was the intent

The BMW N54, N55 ATR , ATP, and AccessPort v2 and v3(mostly) continue to have updates and added features pushed out to them.

There is a discontinue of DME table development yes. Saying that COBB doesn't support their product anymore is an exaggeration, they still offer support to any customer to resolve issues direct, even new ROMs for existing supported vehicles.

[Cloud9blue]

Originally Posted by BuraQ

I want to clarify this as people will take it the wrong way which can be misleading unintentionally if that was the intent

The BMW N54, N55 ATR , ATP, and AccessPort v2 and v3(mostly) continue to have updates and added features pushed out to them.

There is a discontinue of DME table development yes. Saying that COBB doesn't support their product anymore is an exaggeration, they still offer support to any customer to resolve issues direct, even new ROMs for existing supported vehicles.

Yes, but DME table development is where all the fun is at these days