N55 JB4 FIRMWARE UPDATE
N55 JB4 FIRMWARE UPGRADE

I haven't dealt with better customer service and faster responses in my entire life. These guys at BMS have something figured out and they really do care about the consumer.

N55 JB4 FIRMWARE UPDATE

I can't imagine a better product on the market right now that can touch the JB4 with the iso update no matter what the cost (minus a dyno tune of course). The update is a much simpler process than it seems and well worth the 10 min or so to do it. I can't even imagine what the car will feel like with a couple bolt ons. Don't get me wrong, the JB4 is amazing right out of the box and plenty of fun, but with the iso mod, it's a beast. My comparison is based on using 95 oct before and after the iso update. Sometimes only reaching 8-10psi under the same conditions from one pull to the next.

N55 JB4 FIRMWARE UPGRADE

Prior to the upgrade I would reach 12 and 14psi, but you never knew what you were going to get when hitting the gas. The boost is way more consistent and I reach 14-16psi on every pull. The car is so much more responsive and pins me back in my seat every time I press my foot to the floor. It feels as if I upgraded to a stage 3 if there was such a thing. I finally made the plunge and updated the firmware last week and let me tell you, it's a night and day difference. I know map 5 was made to be a self learner and constantly changed depending on many variables, but it definitely made me want a faster and more consistent map than 5 (1 just didn't do it for me). The issues I had were the boost was inconsistent and varied constantly every time you drive. I was typically using map 5 prior to the firmware update and it was a blast to drive. Obviously going from stock to JB4 is night and day, as everyone already knows, so I'll focus on the firmware upgrade. I run 95 oct which doesn't hurt my case, but even on 93 the car is a beast. My car is completely stock minus the BMS intake. I can't believe how much fun you can have from a relatively inexpensive mod. Getting a JB4 and updating the firmware is a must. I'll stick with the short version as I could go on and on about all the bonus features that separate the JB4 from the rest. This review is long overdo as I have been so grateful for the fantastic customer service of BMS. 2012 N55 135i JB4 stage 2 w/ iso firmware

N55 jb4 firmware