[NYBMWBrian]

I ordered the JB+ engine tune for the B58 motor. The install looks pretty simple, as it only requires minimal wire disconnect/reconnect. I was reading that this engine tune adds up to 30-40hp and 40-50 lbs ft trq to the B58 motor, that is a pretty big jump in power. How does this engine tune work, what does it reprogram? Any feedback would be awesome. Thanks everyone.

[yoon_209]

its a piggyback... you would have been better off with jb4

[NISFAN]

Originally Posted by NYBMWBrian

I ordered the JB+ engine tune for the B58 motor. The install looks pretty simple, as it only requires minimal wire disconnect/reconnect. I was reading that this engine tune adds up to 30-40hp and 40-50 lbs ft trq to the B58 motor, that is a pretty big jump in power. How does this engine tune work, what does it reprogram? Any feedback would be awesome. Thanks everyone.

It intercepts the MAP (manifold air pressure)sensor signal and downgrades the reading back to the ECU. This fools the ECU into adding more boost to achieve its target. Example MAP reading = 1.0 bar, JB+ intercepts signal and sends distorted signal to ECU of 0.6 bar. ECU is controlling wastegate and wants to achieve 1.0 bar, so ups boost by 0.4 bar. Result 1.4 bar of real boost.

[Nugget]

Originally Posted by yoon_209

its a piggyback... you would have been better off with jb4

JB4 is also a piggyback.

[yoon_209]

Originally Posted by Nugget

JB4 is also a piggyback.

yes. I was answering his question and also stating that he would have been better off with a jb4 than a jb+

[NYBMWBrian]

Thanks guys, that really helped me understand whats happening with this piggyback tune.

[mike@x-ph.com]

Originally Posted by NISFAN

It intercepts the MAP (manifold air pressure)sensor signal and downgrades the reading back to the ECU. This fools the ECU into adding more boost to achieve its target. Example MAP reading = 1.0 bar, JB+ intercepts signal and sends distorted signal to ECU of 0.6 bar. ECU is controlling wastegate and wants to achieve 1.0 bar, so ups boost by 0.4 bar. Result 1.4 bar of real boost.

+1

[Mike@N54Tuning.com]

Originally Posted by NISFAN

It intercepts the MAP (manifold air pressure)sensor signal and downgrades the reading back to the ECU. This fools the ECU into adding more boost to achieve its target. Example MAP reading = 1.0 bar, JB+ intercepts signal and sends distorted signal to ECU of 0.6 bar. ECU is controlling wastegate and wants to achieve 1.0 bar, so ups boost by 0.4 bar. Result 1.4 bar of real boost.

Well summarized..

The JB+ is a simple boost controller.. Not a full tune like the JB4.

Mike

[jpsimon]

Definitely get a JB4 over the JB+

[babyboss]

Waste of Time & $$$ ..

[chenry]

Originally Posted by babyboss

Waste of Time & $$$ ..

This

[Mike@N54Tuning.com]

Originally Posted by jpsimon

Definitely get a JB4 over the JB+

That is usually our recommendation as well..

But the price point of the JB+ makes it really attractive if all you want is a couple PSI over stock and have no plans to do anything else to the car.

Mike

[NYBMWBrian]

I do have one question/concern regarding JB+ or Dinotrontics tune. Can these plug in tunes cause any errors/damage to engine?

[SO8]

Originally Posted by Mike@N54Tuning.com

That is usually our recommendation as well..

But the price point of the JB+ makes it really attractive if all you want is a couple PSI over stock and have no plans to do anything else to the car.

Mike

So if you only wanted maybe an extra 20bhp is this the best option ?

[13blk335ix]

jb4 and jb+ have cause problems for engines. so yes its a possibility. i recommended bootmod3 or mhd. these hook up to your obd2 port and fl⁶ash your ecu.

tuners have access to your entire car.

if your moving away from stock and are conscerned with engine issues my best advice is oil changes. with my bootmod3 tune and bolt ons keeping up with the maintenance is key. you should be changing oil and filter every 5k miles.

keep your fluids topped off. do a coolant flush before tuning, change your spark plugs and ignition coils before hand to ensure proper spark burn.

if your n55 make sure to upgrade your chargepipe. i went with evolution racewerks anodized black because i have xdrive.
depending on your mileage look at getting a walnut blast.

grab a drop in air filter to compliment your jb+.

i think i read that if you buy the jb+ and you want to upgrade to mo powah baby, (which you will) and get the jb4 they take the price of tbe jb+ off the jb4 if you send it back in.

after doing my mods if i was asked what was your favorite mod besides flash tune i would say catless downpipe. get one. and enjoy the sounds and added horsepower.

[Fuel-It!]

JB+ is one of the most popular tuners out there since it gives such solid gains with a 30 second install and no trace left behind when removed. It's even 50-state legal for the B58.

Flashing is great too but there is always a trace left behind so you have to weigh the options as to what you want.

[Quinn A]

What exactly is the power difference between the JB plus and JB4 stage 1 93 map on a B58?

I dont plan on modding my 440 at all but have a local selling a Jb+ for $100 and from the looks of it i would just be down roughly 10hp when compared to a JB4?

[dizzy619]

Originally Posted by Quinn A

What exactly is the power difference between the JB plus and JB4 stage 1 93 map on a B58?

I dont plan on modding my 440 at all but have a local selling a Jb+ for $100 and from the looks of it i would just be down roughly 10hp when compared to a JB4?

Pay no attention to the naysayers... Bang for buck it's great..

[Fuel-It!]

Originally Posted by Quinn A

What exactly is the power difference between the JB plus and JB4 stage 1 93 map on a B58?

I dont plan on modding my 440 at all but have a local selling a Jb+ for $100 and from the looks of it i would just be down roughly 10hp when compared to a JB4?

Down 10-30hp depending on the map but like I said it's way better than stock. For $100 go for it. It's only $200 new so even new it's a great value and BMS has an upgrade program where you can trade it up to a JB4 later if you want more power/features.

[luchocamp]

Originally Posted by 13blk335ix

jb4 and jb+ have cause problems for engines. so yes its a possibility. i recommended bootmod3 or mhd. these hook up to your obd2 port and fl⁶ash your ecu.

tuners have access to your entire car.

if your moving away from stock and are conscerned with engine issues my best advice is oil changes. with my bootmod3 tune and bolt ons keeping up with the maintenance is key. you should be changing oil and filter every 5k miles.

keep your fluids topped off. do a coolant flush before tuning, change your spark plugs and ignition coils before hand to ensure proper spark burn.

if your n55 make sure to upgrade your chargepipe. i went with evolution racewerks anodized black because i have xdrive.
depending on your mileage look at getting a walnut blast.

grab a drop in air filter to compliment your jb+.

i think i read that if you buy the jb+ and you want to upgrade to mo powah baby, (which you will) and get the jb4 they take the price of tbe jb+ off the jb4 if you send it back in.

after doing my mods if i was asked what was your favorite mod besides flash tune i would say catless downpipe. get one. and enjoy the sounds and added horsepower.

even bootmod and or mhd can cause damage to your engine.
I also see damage engine complete stock dme...
JB4 is a great device just follow instructions map for every octane rate in your mobile.

[danarino]

I have one and I think its great so long as you dial it in to your liking. The more boost you add, the less smooth the car will be. I ran it at the stock setting for a few months (+4 psi, 3 o'clock on the dial) and it was significantly faster but would have missteps here and there like shift delays and on/off turbo behavior. I turned it down a little (+3.25 or so psi, 1 o'clock setting) and its perfect. Not as aggressive as 4psi but still much faster than stock and basically stock drive-ability. The weather and fuel quality will affect your results. Play around with it and find your sweet spot. I think its the perfect mod for people leasing.

[BMWApp]

Originally Posted by danarino

I have one and I think its great so long as you dial it in to your liking. The more boost you add, the less smooth the car will be. I ran it at the stock setting for a few months (+4 psi, 3 o'clock on the dial) and it was significantly faster but would have missteps here and there like shift delays and on/off turbo behavior. I turned it down a little (+3.25 or so psi, 1 o'clock setting) and its perfect. Not as aggressive as 4psi but still much faster than stock and basically stock drive-ability. The weather and fuel quality will affect your results. Play around with it and find your sweet spot. I think its the perfect mod for people leasing.

Thanks for your insight. My JB+ arrives tomorrow for my 340i xDrive and I can’t wait to install it. My car is CPO with the warranty going for another 18 months so I didn’t want to flash time or get a piggyback that is more difficult to uninstall for servicing, yet I wanted to do something for additional power. It seems like a great deal for the cost and ease of installation and removal. My only question is how the drive ability of the car will be impacted but this seems to answer that. Thanks!