JB4 questions
#1
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Join Date: Jan 2011
Location: OH
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My Ride: 2008 535xi
V1 hardwire
Laser Interceptor
12" JL Audio Ported PowerWedge enclosure with one W1v2
20% tint
I've been doing some reading, and am about to pull the trigger on a JB4. But before I do I have a few questions:
How many of you have it on your DD?
At what mileage did you install it, and what is your current mileage?
Assuming you can stay out of the throttle, how much worse are your MPGs?
Does the auto code deletion feature work well?
Thanks!
How many of you have it on your DD?
At what mileage did you install it, and what is your current mileage?
Assuming you can stay out of the throttle, how much worse are your MPGs?
Does the auto code deletion feature work well?
Thanks!
#2
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Join Date: Mar 2009
Location: Plano, TX
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My Ride: 2009 M3
I've been doing some reading, and am about to pull the trigger on a JB4. But before I do I have a few questions:
How many of you have it on your DD?
At what mileage did you install it, and what is your current mileage?
Assuming you can stay out of the throttle, how much worse are your MPGs?
Does the auto code deletion feature work well?
Thanks!
How many of you have it on your DD?
At what mileage did you install it, and what is your current mileage?
Assuming you can stay out of the throttle, how much worse are your MPGs?
Does the auto code deletion feature work well?
Thanks!
- I've been running it on my daily driver for about a year or so now. I ran the JB+ for about 3-6 months before that.
- I've logged nearly 12k miles (41k-50k) with it.
- I don't really track my mileage. Due to traffic during my daily commute I'm out of the boost most of time. I would say there hasn't been a change during normal use though. During "spirited" drives it defiantly has an impact on mileage but that is to be expected when making more power.
- The JB3 doesn't have the code delete feature so I can't comment on how well it works personlly.
I would recommend joining n54tech for more research and support on any BMS products. Terry provides first rate support.
#3
I have the JB4 on an auto 535i. I get 17.5 mpg in suburban driving, depends of how hard I hit the throttle. Highway is high 20s. Doing quick sprints and hard acceleration definitely chews up gas, so it comes down to driving style. I would say the difference is minimal if you drive in the same manner as before the install.
Overall I tend to drive faster than without the JB4, just because you get used to all that power on tap. Why else would you go through the trouble of installing it if you aren't gonna rip it once in a while?
Overall I tend to drive faster than without the JB4, just because you get used to all that power on tap. Why else would you go through the trouble of installing it if you aren't gonna rip it once in a while?
#4
Senior Members
I have it.
Installed at 32000 miles, have had it for 6000 miles now.
MPG dropped from around 20ish to around 18.3, mostly because you are more heavy footed after installing it.
Code delete works perfectly, have took my car in for service numerous times after deleting codes.
Installed at 32000 miles, have had it for 6000 miles now.
MPG dropped from around 20ish to around 18.3, mostly because you are more heavy footed after installing it.
Code delete works perfectly, have took my car in for service numerous times after deleting codes.
#5
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Join Date: Apr 2011
Location: Kansas City
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My Ride: 2008 535xi Platinum Gray, Black Dakota Leather, Sport Pkg
Separate question about JB4....Does it improve throttle response and reduce turbo lag. I'm less interested how fast my top end speed is, and more interested in low-end torque and responsiveness from standstill. Anyone?
#6
Senior Members
Yes there are also different map settings you can set to for changes in throttle and turbo lag.
#7
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Join Date: Jan 2011
Location: UpState SC
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My Ride: 2008 535i LCI with sports/premium package, Sports trans with paddle shifters, CF emblems, JB4 Software, Dinan Exhaust, Navigation, M5Tech body kit, Carbon wrap interrior trim and CIC Controller.
I installed mine at 50000 and I have 54000 now. The car is a beast! Before, if I turned off the DSC, place in sports mode and turn off AC then floor it at 10 mph, I might get the tires to chirp but the car of course moved on out. Now, if I do the same the the back end will fishtail and clearly leave a nice set of black marks. I love the power this mod added! Gas miles actually increased 0.5 I consistently get 24 with town and high combined 28-29 if I reset on the interstate. This is of course not jamming the throttle all the time...
#8
I've been doing some reading, and am about to pull the trigger on a JB4. But before I do I have a few questions:
How many of you have it on your DD?
At what mileage did you install it, and what is your current mileage?
Assuming you can stay out of the throttle, how much worse are your MPGs?
Does the auto code deletion feature work well?
Thanks!
How many of you have it on your DD?
At what mileage did you install it, and what is your current mileage?
Assuming you can stay out of the throttle, how much worse are your MPGs?
Does the auto code deletion feature work well?
Thanks!
Just do it the Burger tuning guys are great!
#10
Senior Members
Numerous DYNO spreadsheets of N54 engine with JB4, Proceed, Cobb, etc...
Many Dynos are of stock vehicles and many of vehicles with other engine mods along with the tune.