[quinmayette]

I'm looking for a tune on my car and I want to know what is the advantage of JB4 over a JB3. Best hp, best torque ?

[newmanman]

Only had JB4 , about 3 months now ,awesome product, DIY PNP and just drive it, the advances in development Terry at BMS has made over the JB3 with on the fly mapping are fantastic, depends on other mods you make for RWHP & Torque gains.

Go jb4 with a DCI and you will never ever ever ever regret it

[idrift4wd]

there is only 1 or 2 maps for the jb4 you can run if you are stock.

jb3 you have the possible 5 maps for a stock car. (4+5 for people who have 93 around them)

but jb4 has integrated everything youd want. boost is lowered if your engine is cold, on the fly map changes, read and delete codes plus alot more.

[N54B30A]

I have the JB4 had it since january. It is the best thing i have ever bought for less that $1k. The difference is huge. And its easy to install, havent had any problems with it, on the fly map switching is awesome. It has everything i could ask for in a tune. Make sure when you install it wire the datalogging cable through the glovebox for easy datalogging/updating.

[Wild Squid]

Is there a JB4 for the new '11 N55 engines?

[tscdennab]

You really should not get the JB3 now that the JB4 is out. The JB4 has proper boost control having CANbus access while the JB3 needs to guess it. Don't cheap out on this

[Mike@N54Tuning.com]

Below are some of the improvements the JB4 brings to the table over the super popular JB3.

The JB4 features 5x the processing power, 2x the memory, more robust signal conditioning, and integrated CANbus. Our new CANbus module allows the JB4 to communicate with your vehicle like never before. New features include code reading/deleting, optional in dash boost, timing, air/fuel, shift light, and IAT gauges, autotuning, a buttery smooth new CANbus based integrated boost control system, map switching on the fly via steering wheel controls, built in downpipe fix, hot/cold oil temperature protection, progressive methanol integration, water pump remapping, gear dependent boost control/traction assist, and much more to come with free firmware updates uploaded using a windows laptop (or mac w/ windows emulator) and BMS USB cable.

Mike