The JB4 Tuning Box increases horsepower by 40 to over 100 horsepower depending on the type of fuel used. 91 octane produces 40 horsepower gains, 93 octane 60 horsepower, and 98 octane+ over 100 horsepower.
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Is JB4 safe for N54?
The JB4 includes a simple plug and play installation harness and is compatible with all ECU versions and transmission types. It’s everything you need to take your N54 powered vehicle from mild to wild.
Does JB4 hurt engine?
The JB4 doesn’t accelerate wear on anything by itself. What accelerates wear is the increased performance of the car. A flash tune will wear it as well. But injectors, coils, and turbos will fail regardless of a tune/Jb4 or not.
How much HP does a downpipe add to a 335i?
Expect gains of approximately 50HP when upgrading the downpipes and flicking the switch to Stage 2 tuning. The difference in power gains from a catless downpipe compared to a high flow catted downpipe are only a few horsepower.
Does JB4 make car louder?
No, it won’t increase exhaust sound. Running the extra psi will increase your intake sound if you get an aftermarket intake but not by much. The stock exhaust note will not increase regardless of tune or not. Just spring for the catback or start with a resonator delete.
How much power can a FBO N54 make?
Stock N54 Block (750-900whp) The block holds up well even at 750+whp. Problems can still happen, but it’s rare until you get above the 850-900whp mark. It costs a lot to build a proper, usable 750+whp N54.
Can dealerships detect JB4?
Actually according to jb4, if it’s installed and uninstalled correctly each time. The dealership would have no way of seeing any tampering. Bmw will detect your JB4 if they dig deep enough.
What map should I run on JB4?
map 5 all the way! 2nd. Could run logs on both map 1 and 5 to see which your car likes better, but 5 is all good. 5 is always recommended.
What is the best tune for N54?
All things considered, the MHD is an excellent tuning option for the N54. Ultimately, as referenced above, we recommend opting for the JB4 and coupling it with the MHD back-end flash maps. The back-end flash maps are free with the purchase of the MHD flasher module for $99.
Does JB4 adjust timing?
While performance is usually very similar between the two there are a few things the JB4 just can’t do including changing fuel injection timing (exhaust pops and bangs), raising the RPM limiter, adjusting valve timing, and in some cases, raising the speed limiter.
Does JB4 remove speed limiter?
Speed limiter gets removed with jb4 backend flash.
How reliable is a JB4?
Jb4 is the most proven BMW tune in the world, its 100% safe. No reason to worry.
How much HP is a Stage 2 335i?
Expected horsepower for the N54 on stage 2 maps is in the ballpark of 330-390whp.
How much HP does a full bolt on 335i make?
Out of the box, the 335i comes with a 300hp engine which produces an equal 300ft/lbs of torque.
How much HP does a tune add to a 335i?
Instead, we’ll give a quick breakdown of BMW 335i horsepower potential: Tune-only: 350-400 horsepower. Tune + bolt-ons: 400-500+ horsepower. Turbo upgrades: 450-700+ horsepower.
Does JB4 have launch control?
Jb4 doesnt have launch mode, only Procede.
How much HP does JB4 Map 2 add?
I’ve seen people do stage 2 (JB4 MAP2) dynos with a DP, IC, and chargepipe and they’re getting 60HP over stock. From what I understand, JB4 is just a boost controller. Stock boost is around 18PSI and MAP2 hits around 23PSI. Is +5PSI in boost really all it takes to add ~60HP?
Does JB4 have burble?
With my catless downpipes and JB4 the car burbles nicely. I love the sound actually!
How fast is FBO N54?
Brake-boosting the AWD N54 yielded a best blistering fast time of 11.9 @ 116mph. That’s about two full seconds faster than a stock N54 335xi which typically run in the 13.8 to 14.00 second range.
How much HP can a stock 335i transmission handle?
So what i gather from this post, is that keeping a 335i auto around 400-450 whp is pretty safe for our tranny’s, if you keep it off the track and no hard launches with sticky tires…
Are N54 internals forged?
Mahle Motorsports N54 pistons are forged for strength, light weight, and low drag to be a modest upgrade over the stock BMW pistons. Factory BMW pistons are cast aluminum, which is fine for the intended power output and durability.
Does JB4 void BMW warranty?
The JB+ or JB4 does not void your warranty. However if there is a failure or a part that could be attributed to the aftermarket device, that warranty claim could well be denied.
Which is better RaceChip or JB4?
Racechip = easy install, SUPER Quality and easily knocks 0.80 seconds off your 0-100mph time. JB4 = Will add more average and peak power and go faster than RaceChip if you want to push boost and parts.
Can BMW detect a piggyback?
The piggyback itself would not be flagged by the computer system but could be flagged visually by a technician if you left it on. The issue is at the time of failure, if something happens and you then remove the piggyback then it won’t matter.
What does a JB4 tune do?
What is a JB4? The JB4 is a plug and play tune available for turbocharged vehicles. The JB4 tuner installs between your car’s sensors and its DME/ECU (computer) and manipulates vehicle performance through these connections making your vehicle much faster.