What is a JB+?


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The JB Plus is a quick and simple way to add HP with minimal cost and minimal install effort. Something that anyone can buy, install in under a minute, and really feel from the driver’s seat. B38/B46/B48/B58 JB Plus Quick Install Tuner. $ 239.00. JB Plus N20/N55 Quick Install Tuner.

How much HP does JB4 add B58?

Power gains are up to 80hp to the wheels (100hp crank) on a completely stock car on pump gas for a B58, and up to 40hp to the wheels (55hp crank) for a B48, gains with bolt-on parts, higher octane, E85 mixtures, and larger turbos are even higher.

How much HP does JB+ add?

Plug in up to 35 extra wheel horsepower in seconds! While the JB4 is the ultimate tuner, the JB Plus is a quick and simple way to add a few HP with minimal cost and minimal installation effort. Something that anyone can buy, install in under a minute, and feel from the driver’s seat.

What is JB4 BMW?

JB4 is a plug & play chip tune for turbocharged vehicles. The JB4 comes preloaded with custom tuning software and up to 8 maps for various fuel and modification levels. The JB4 installs between your car’s sensor and its DME/ECU (computer) and manipulates vehicle performance through these connections.

Can dealers detect JB4?

Just like few people already said, anything is detectable. Flash tunes are detectable if your tuner opens or drills the DMEs. Also JB4 is detectable if the dealer knows what he is looking for. This is what we always tell all of our customers.

Why is the B58 so good?

It manages a respectable 322-382hp and 332-369 lb-ft from the factory. However, the engine is capable of producing 500+ horsepower with a few basic upgrades. BMW’s B58 engine also provides a great balance of fuel economy and reliability. There’s a reason Toyota opted to use the B58 3.0 turbo in their legendary Supra.

How much HP can a B58 handle?

B58 Engine Limits – Simple Answer. The BMW B58 engine can handle around 600-650whp and 550-600wtq on the stock block and internals.

Does JB4 make car louder?

JB4 open flap. Yes the tips shouldn’t make a difference, but the car was 100% louder after I put them on. I normally got a pretty loud gurgle sound especially when it was dropping into low RPM’s and when I would shift. Now with the JB4 the gurgle is gone and the car seems quieter.

Does JB4 tune 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 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.

Can BMW pick up 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 there any way to detach without having anything logged on the ecm? Actually according to jb4, if it’s installed and uninstalled correctly each time.

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.

Which is better RaceChip or JB4?

Racechip is easy to 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.

What’s the most reliable BMW engine?

โ€“ The N54 twin-turbocharged inline-six engine from the E90/E92/E93 M3 is another one of BMW’s best engines. It makes excellent power and is very well-built, making it extremely reliable. โ€“ The S65 V8 engine from the E9X M3 is another great option if you’re looking for a reliable BMW engine.

How long will a B58 last?

How long an engine will last is always a tough topic. There’s no right answer, but in general the B58 should last as long as you’re willing to continue repairs and standard maintenance. The internals and design are plenty strong to surpass 200,000 miles.

Which is better N55 or B58?

As you can see, from very early on the B58 has big gains over the N55 which it holds right through the rev range. As you can see, the B58 has a very similar boost curve, but makes around 4PSI more than the N55 across virtually the whole rev range.

Is the B58 twin turbo?

As per the N55, the B58 also features a single twin-scroll turbo, direct fuel injection, variable valve timing (called double Vanos by BMW), variable valve lift (called Valvetronic by BMW).

Is the B58 in the Supra?

Prepare to add a fourth member as the 2023 GR Supra is here with three pedals. Offered exclusively with the BMW B58 engine, the 6MT is claimed to be a newly developed transmission tailored to the 3.0-liter inline-six.

Is B58 better than N54?

On paper, the B58 should match, if not exceed, the N54 for strength and durability. Although, the single turbo will likely limit its capabilities without upgraded turbo(s).

Does JB4 remove speed limiter?

Speed limiter gets removed with jb4 backend flash.

Does JB4 change sound?

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.

How much HP does JB4 add n55?

Power gains of up to 80hp on a stock vehicle without the risks of flashing!

Does tuning void warranty BMW?

The short answer, here, is yes, tuning your new BMW will void your warranty. A tune requires adjustments and sometimes a complete remapping of your vehicle’s ECU factory settings, so you’re literally changing the way it runs.

Does ECU tune void warranty?

Because ECU tuning requires adjustment to the factory settings of the ECU, or completely uploading a new map into the ECU, it will void its warranty. The same goes for insurance, however, some insurance companies allow you to specify modifications to the vehicle, which may cover the ECU tune.

How long does it take to install JB4?

With the JB4 you plug it into sensors in the engine bay, usually taking 20 to 30 minutes the first time as you learn where each sensor is for your specific model. Once you’ve installed it once, most JB4 systems can be fully removed in less than 10 minutes.

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