[kalien34]

Put it on once arrived 2 hours ago, took her out for a ride.

At Comfort mode, definitely felt more power especially at 3000+ RPM. I actually had the DSC activated once when I pulled off from rump into a freeway.

At Sport mode, man the car becomes relentless! Very obviously the car tends to keep the RPM above 2K more often than without the JB+, and whenever it's above that RPM range, I can feel a clear boost in power.

But if just for cruising with Comfort mode, I can't say there's too much difference, given the fact that in this mode won't give you high RPM all the time.

[Untdrums]

Thanks for the report. I'm trying to decide whether or not the JB4 is worth the extra $230 over this. Some people say it's great. Some say the JB+ is enough. I just got my car last night so I have to wait until break in anyway.

[kalien34]

Originally Posted by Untdrums

Thanks for the report. I'm trying to decide whether or not the JB4 is worth the extra $230 over this. Some people say it's great. Some say the JB+ is enough. I? just got my car last night so I have to wait until break in anyway.

You can always get the JB+ first, and then upgrade to JB4 and get a credit by returning the JB+ within one year. That's what's stated on BMS' website.

If you ask me, I would expect Comfort mode to have more noticeable difference, especially under 3K RPM as that's the normal range for city cruising. Sport mode on the other hand, has much more noticeable improvement even at 2K RPM, which is quite amazing. But in stop and go traffic it would be a bit to dramatic to be in Sport mode.

That's my only complaint so far... In terms of installation, that's like 5th grade difficulty, sooooooo easy!!!

[Strudle]

I've been using the JB+ for a few months now and love it. I do think Sport mode boost is more than you need for traffic, I tend to save it for the backroads and interstate. If you floor it in Comfort mode you'll still get the power, it just takes longer for the boost to arrive.

[arvi604]

Feedback here sounds similar to the Dinan Sport Tuner reviews. Curious to hear from someone who’s tried both.

[kalien34]

Originally Posted by Strudle

I've been using the JB+ for a few months now and love it. I do think Sport mode boost is more than you need for traffic, I tend to save it for the backroads and interstate. If you floor it in Comfort mode you'll still get the power, it just takes longer for the boost to arrive.

Yea I can definitely feel the power after 3k RPM, but as a mode that you’d use in stop and go traffic or average speed cruising, you can’t normally get to that range and therefore it’s much less noticeable.

I enjoy Sport mode on highways as well, the power just keeps press your back!

[7iM3less]

Originally Posted by arvi604

Feedback here sounds similar to the Dinan Sport Tuner reviews. Curious to hear from someone who’s tried both.

I'll let you guys know my feedback on both. I had the jb+ for a few weeks and sold it. I'll have a Dinan Sport Tuner in about a week.

[Strudle]

I'll let you guys know my feedback on both. I had the jb+ for a few weeks and sold it. I'll have a Dinan Sport Tuner in about a week.

Would be eager to hear. Was there something about the JB+ you didn't like?

[7iM3less]

Originally Posted by Strudle

Would be eager to hear. Was there something about the JB+ you didn't like?

Not really....but like a lot of people have mentioned it tends to be jerky in how it applies the boost (I know Dinan unit is the same way). I wasn't crazy about the jerkyness so I got rid of it but now I miss not having that extra kick in Sport mode. Man my take-off in the first 2-3 gears with the JB+ were sick!

I sold it as I was going to move up to JB4, but having went to my dealer yesterday I found out they are pro-Dinan so whatever Dinan parts I apply to my car they will honour and not dismiss my factory drivetrain warranty.

So here I am trying the Dinan unit. I'm expecting an identical experience to the JB+. I've read countless threads on it. The cool thing however is I have the Avin Android screen so rather than monitor the boost via my phone I can do it straight from my idrive screen (via Android Dinan app) and with Dinan you have the option to turn the piggyback completely off (Stock mode) through the app which I like. With the JB+ I had to pop the hood and unscrew the unit itself to turn the dial.

[kalien34]

Originally Posted by KC328_F30

Not really....but like a lot of people have mentioned it tends to be jerky in how it applies the boost (I know Dinan unit is the same way). I wasn't crazy about the jerkyness so I got rid of it but now I miss not having that extra kick in Sport mode. Man my take-off in the first 2-3 gears with the JB+ were sick!

I sold it as I was going to move up to JB4, but having went to my dealer yesterday I found out they are pro-Dinan so whatever Dinan parts I apply to my car they will honour and not dismiss my factory drivetrain warranty.

So here I am trying the Dinan unit. I'm expecting an identical experience to the JB+. I've read countless threads on it. The cool thing however is I have the Avin Android screen so rather than monitor the boost via my phone I can do it straight from my idrive screen (via Android Dinan app) and with Dinan you have the option to turn the piggyback completely off (Stock mode) through the app which I like. With the JB+ I had to pop the hood and unscrew the unit itself to turn the dial.

I wonder by "jerky" do you mean even in Comfort mode? I think it's pretty subtle while in that mode, and it's almost my complaint about it. Thus why not use Comfort while you'd like some peaceful drive, and simply switch to Sport when you are eager for some boost?

[7iM3less]

Originally Posted by kalien34

I wonder by "jerky" do you mean even in Comfort mode? I think it's pretty subtle while in that mode, and it's almost my complaint about it. Thus why not use Comfort while you'd like some peaceful drive, and simply switch to Sport when you are eager for some boost?

You get the jerk in all the modes. Even in comfort. It's most noticeable when you hit the gas at sudden moments and in between random shifts here and there. The complaint is consistent across all the reviews on the forum.

You start to notice it more after you get use to the tune. When I first got it I wasn't feeling it.

[kalien34]

Originally Posted by KC328_F30

You get the jerk in all the modes. Even in comfort. It's most noticeable when you hit the gas at sudden moments and in between random shifts here and there. The complaint is consistent across all the reviews on the forum.

You start to notice it more after you get use to the tune. When I first got it I wasn't feeling it.

Is it something like a lag between your stepping on the throttle and the car's reaction?

I hope it's not that noticeable to me... I hated similar lag in my previously IS250...

[7iM3less]

Look what I found in my mailbox.

Will update everyone on JB+ and Dinan difference once I get home and give it a try.

[Bear3525]

Originally Posted by arvi604

Feedback here sounds similar to the Dinan Sport Tuner reviews. Curious to hear from someone who’s tried both.

I`ve had the Dinan stage 2 ( which I am now selling ) It was good, but I felt like it wasn't enough for my 335. IMO there is a huge difference with the JB4. Especially while running 3-4 gallons of E85.

[babyboss]

got the jb+ on 2 cars my 440i & M240i bout a month now ..
not impressed @ all ..
gear changing not smooth as oem ..
power is very minimal in midrange & dies off @ higher rpm - as tested on dyno ..

& no reply yet from jb guys to swop for jb4 ..

[enjoythemusic]

If you want top end you'll probably need bigger turbo and supporting bits.

[7iM3less]

Originally Posted by babyboss

got the jb+ on 2 cars my 440i & M240i bout a month now ..
not impressed @ all ..
gear changing not smooth as oem ..
power is very minimal in midrange & dies off @ higher rpm - as tested on dyno ..

& no reply yet from jb guys to swop for jb4 ..

It's a $200 plug-in, you cant expect seamless oem integration. Hopefully the JB4 when you get it will meet expectations.

I paid $190 for a Dinan Sport Tune and it's working well on my end. Jerky like that JB+ was when I had it. Although it's nice having the added control of the Bluetooth app this time around.

Can't give a detailed report as I'm having trouble opening my car up in 0 degrees weather and winter tires.

[Disaster]

Originally Posted by KC328_F30

It's a $200 plug-in, you cant expect seamless oem integration. Hopefully the JB4 when you get it will meet expectations.

I paid $190 for a Dinan Sport Tune and it's working well on my end. Jerky like that JB+ was when I had it. Although it's nice having the added control of the Bluetooth app this time around.

Can't give a detailed report as I'm having trouble opening my car up in 0 degrees weather and winter tires.

Are the JBs and Dinan plug-ins compatible with the 2014 428xi N26 models?

[7iM3less]

Originally Posted by Disaster

Are the JBs and Dinan plug-ins compatible with the 2014 428xi N26 models?

A quick trip to the website will answer that question:

https://www.dinancars.com/product/d4...6-n55-engines/

Note the URL.

[Disaster]

Nailed it. Thanks!

[MacklinUSOB]

Originally Posted by KC328_F30

You get the jerk in all the modes. Even in comfort. It's most noticeable when you hit the gas at sudden moments and in between random shifts here and there. The complaint is consistent across all the reviews on the forum.

You start to notice it more after you get use to the tune. When I first got it I wasn't feeling it.

I've been running the JB+ on my N20 6MT for a month now and am very satisfied with the boost in power. Since I'm not bound by the transmission programming, I guess I am not experiencing the extent of the jerkiness reported by many. I do feel the boost modulate slightly under WOT sometimes, so it isn't exactly smooth as butter, but it isn't more extreme than the modulation I got from my ECU tune on my previous turbo vehicle at WOT. This was a fear of mine when reading up on it at first, but I'm glad to report my application reatined a smooth and linear throttle in comfort mode. Sport and Sport+ even before installing were pretty jerky when going between 0 and say 3% throttle input, this remains mostly the same, but when you put your foot in it, damn it dropkicks you into the seatback way harder than before.