Power gains of up to 100hp on a stock vehicle without the risks of flashing! The JB4 is the most advanced and highly featured tuning system available for your B58 and B48 vehicle.
Can BMW detect JB4?
Bmw will detect your JB4 if they dig deep enough. Read the new ISTA thread and how easy it is to flag your car now.
Is JB4 a good tune?
After having the JB4 installed, I really cannot go back to stock. I think that the JB4 is a great buy for 90% of people who want more power, without the costs of building a more robust powertrain. For those 90%, I give this unit an A+ and highly recommend.
How do JB4 work?
JB4 is a piggy back tuning box which, like all other tuning boxes, intercepts sensor signals from around the engine to fool the engine ECU into thinking actual boost. Bmw use ECU governing parameter dictated by load / torque as opposed to boost. Its a rather dirty but functional way to tune a car.
How much horsepower does JB4 add? – Related Questions
What does JB4 do to a car?
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.
Does JB4 remove speed limiter?
Speed limiter gets removed with jb4 backend flash.
Does JB4 void 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.
Is JB4 a piggyback tune?
JB4 is a piggy back system for tuning, basically controls engine paremeters from the ECU to the Engine. Its a rather dirty but functional way to tune a car.
Does JB4 have launch control?
Jb4 doesnt have launch mode, only Procede.
Does JB4 have burble?
With my catless downpipes and JB4 the car burbles nicely. I love the sound actually!
Does jb4 make exhaust 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.
What is exhaust burble?
An exhaust burble, or throaty popping noise which could be likened to a babbling brook, is has a different cause if it only occurs when suddenly backing off on a vehicle’s throttle.
Can you adjust burbles on jb4?
Can this be done with the jb4? No as it requires injection timing changes that can’t be done externally without reflashing the car. You’ll have to pick between your warranty/lease return and the exhaust burbles.
What is a back end flash?
A backend flash is an ECU flash tune designed to generally control fueling and timing amongst other things, leaving the piggyback to control boost, maybe some fueling and maybe some meth.
Can you flash with a JB4?
One unique feature of the JB4 compared to other tuning systems is that it’s fully compatible not only with the factory flash map but with off the shelf flash maps, custom tuned flash maps, or any flash map you want to run.
What is better MHD or JB4?
MHD offers some very cost effective back-end flash maps for the JB4. The back-end flash shifts the timing, VANOS, and fueling to the flash side while the JB4 retains its more accurate boost control, in-dash gauges, E85 autotuning, and various safety features.
Can you run bm3 with JB4?
In the end, you cannot run either staged performance map on top of each other. They’ve since edited that information out of their web documentation, but anyone with above average understanding of JB4 should still be able to combine both tuning solutions without any issues.
What is bm3 BMW?
Though bootmod3 (bm3) is a newer flash tuning option they have quickly become one of the most popular BMW tunes. Pro Tuning Freaks bm3 offers a web interface and mobile apps for simple flash tuning. Bootmod3 also offers a handful of off-the-shelf flash maps loaded with cool features.
How much HP does bootmod3 add?
N55 bootmod3 stage 2 horsepower comes in around 335-390whp. As boost increases fuel and supporting mods become more and more important. It’s part of the reason the power range is so wide for stage 2 tunes. Race gas and E30 blends will offer the biggest N55 horsepower gains by a pretty solid margin.
Is bootmod3 a piggyback?
bootmod3 reprograms the vehicle’s factory engine computer (DME) and in some cases other ECUs such as the transmission control unit (EGS/TCU). JB4 is a piggyback device. It is a boost controller with ability to run a methanol pump or secondary fuel injectors.