JB4 B48/B58 Firmware, Settings, and Notes

[VipinLJ]

JB4 firmware V21

Hello

I just tried flashing V21. I was running V20 without any issues. I noticed a message with the V21 download that boost and other settings needed to be redone after flashing. So I flashed it and then tried changing the boost values to what I was running (my custom map 6). Problem is that the values I enter don't get saved. It's the same values I was using with V20. The custom values after flashing to V21 were crazy (boost was as high as 25.9psi at 4500 rpms and boost failsafe was at 31psi). I'll attach screenshots of the map with V21 below which I cannot change. When I enter my values, the app behaves like it saves the values but when I reopen the user defined values, it shows the same crazy values as before (and not the one I entered). I tried thrice and it was the same all three times. So I flashed V20 back and opened the user defined values and it shows the original values I had before. Looks like my JB4 doesn't like the new firmware? Any insight?

[Turboh]

Hello

I just tried flashing V21. I was running V20 without any issues. I noticed a message with the V21 download that boost and other settings needed to be redone after flashing. So I flashed it and then tried changing the boost values to what I was running (my custom map 6). Problem is that the values I enter don't get saved. It's the same values I was using with V20. The custom values after flashing to V21 were crazy (boost was as high as 25.9psi at 4500 rpms and boost failsafe was at 31psi). I'll attach screenshots of the map with V21 below which I cannot change. When I enter my values, the app behaves like it saves the values but when I reopen the user defined values, it shows the same crazy values as before (and not the one I entered). I tried thrice and it was the same all three times. So I flashed V20 back and opened the user defined values and it shows the original values I had before. Looks like my JB4 doesn't like the new firmware? Any insight?

Hi,

We are both running 330I cars with B46 engines. I did notice the V17 is judged as stable and marked ok for B46 and B58 engines. The later versions are marked only for B58. Does this make a difference?

Also, I have tried V19 and found it more unstable for the same user defaults showing boosts running over 30psi. Switched back to V17 and now much better for the same performance and user defaults.

FYI, on 93 octane I am getting VD increase in SAE of about 48 whp.
This is based on map 0 and map 6 absolute WOTs comparison...and 18.6 % gain over OEM. Drivetrain, wind and rolling friction loss is about 31 chp.

Comments?

Alex

[VipinLJ]

Hi,

We are both running 330I cars with B46 engines. I did notice the V17 is judged as stable and marked ok for B46 and B58 engines. The later versions are marked only for B58. Does this make a difference?

Also, I have tried V19 and found it more unstable for the same user defaults showing boosts running over 30psi. Switched back to V17 and now much better for the same performance and user defaults.

FYI, on 93 octane I am getting VD increase in SAE of about 48 whp.
This is based on map 0 and map 6 absolute WOTs comparison...and 18.6 % gain over OEM. Drivetrain, wind and rolling friction loss is about 31 chp.

Comments?

Alex

Hey Alex

Yes we have the same cars. But I've been running the latest updates every time. I remember V17 being good. But I've been running V20 since they launched it and it's been good for my car with the map 6 I'm running. And nope. They changed the firmware name to B58 in between but I've run those with absolutely no issues. They've gone ahead and changed it to BX8 now (X=4 or 5 I assume). So yes. Plus the latest stable version is V20_T3 which is what I'm running now. If you're running it, you HAVE to adjust auto shift boost redux down (with the original default value of 60, the car loses a lot of boost when up-shifting making it VERY jerky and scary if you don't know what was happening; I reduced it to 40 and it's much much better but I should probably try and reduce it a wee bit more since I can still feel the boost reduction)

And my car has been weird. Probably not the car's fault but the road I test it on (since it's inclined upwards). With map 0, my car apparently made only 225-230whp on the road I test it on. Same road, same car, just a few minutes apart, on map 6, my car made 290whp. It has even gone upto 295whp on colder days on the same road. This is all with E22-25. On only 93 and map 3, I believe my car made around 275whp.

Have you ever tried to get dragy numbers for your car? That can give a pretty good stock vs tuned comparison for your car.

Regards,
Vipin

[smahel]

Hello

I just tried flashing V21. I was running V20 without any issues. I noticed a message with the V21 download that boost and other settings needed to be redone after flashing. So I flashed it and then tried changing the boost values to what I was running (my custom map 6). Problem is that the values I enter don't get saved. It's the same values I was using with V20. The custom values after flashing to V21 were crazy (boost was as high as 25.9psi at 4500 rpms and boost failsafe was at 31psi). I'll attach screenshots of the map with V21 below which I cannot change. When I enter my values, the app behaves like it saves the values but when I reopen the user defined values, it shows the same crazy values as before (and not the one I entered). I tried thrice and it was the same all three times. So I flashed V20 back and opened the user defined values and it shows the original values I had before. Looks like my JB4 doesn't like the new firmware? Any insight?

Same here, it's a JB4 mobile bug. Terry's PC interface works correctly and saves the settings.

[VipinLJ]

Same here, it's a JB4 mobile bug. Terry's PC interface works correctly and saves the settings.

Thank you for the update! I don't have the PC app. I guess I'll have to wait for them to fix the JB4 mobile app before flashing V21.

[Antec800]

Does anyone have a link for the latest jb4 application and also I’m experiencing issues with downgrading firmware from v21 back to v20

[VipinLJ]

Does anyone have a link for the latest jb4 application and also I’m experiencing issues with downgrading firmware from v21 back to v20

I just download it from Google play store. I opted to be a beta tester there.

I downgraded to V20 without any issues. Did you try a flashing V20 again?

[Antec800]

It kept failing

[Turboh]

Hey Alex

Yes we have the same cars. But I've been running the latest updates every time. I remember V17 being good. But I've been running V20 since they launched it and it's been good for my car with the map 6 I'm running. And nope. They changed the firmware name to B58 in between but I've run those with absolutely no issues. They've gone ahead and changed it to BX8 now (X=4 or 5 I assume). So yes. Plus the latest stable version is V20_T3 which is what I'm running now. If you're running it, you HAVE to adjust auto shift boost redux down (with the original default value of 60, the car loses a lot of boost when up-shifting making it VERY jerky and scary if you don't know what was happening; I reduced it to 40 and it's much much better but I should probably try and reduce it a wee bit more since I can still feel the boost reduction)

And my car has been weird. Probably not the car's fault but the road I test it on (since it's inclined upwards). With map 0, my car apparently made only 225-230whp on the road I test it on. Same road, same car, just a few minutes apart, on map 6, my car made 290whp. It has even gone upto 295whp on colder days on the same road. This is all with E22-25. On only 93 and map 3, I believe my car made around 275whp.

Have you ever tried to get dragy numbers for your car? That can give a pretty good stock vs tuned comparison for your car.

Regards,
Vipin

Hi,

My average SAE whp on map 0 is 227 whp (same run locations, 93 octane, and onsite weather data) and 233 uncorrected.

My average SAE whp on map 6 is 275 whp (same locations, 93 octane, and onsite weather data) and 294 uncorrected.

Using the OEM rating of 258 SAE chp, this shows a drive train, wind, rolling loss of 31 chp.

My favorite map setting on V17 is map6, variable boost starting at 3.5 psi and going to 8.5 psi over the rpm range. Gain is 15, ff 47, DB 50 to 89, and WGDC 50-99.

Even though I have no EWG wire connected, The FF curve and WGDC follow nicely and fairly closely. This setting also has kept the boost level high through the entire rpm range and without significant boost dip at higher rpms.

I am never quite sure about Terry's descriptions for each map. They appear inconsistent. So, I just experiment and see what happens with the output. Clearly you do not need the EWG wire to change WGDC and the DB setting will keep the boost higher where you want it. High gains make for very rough rides. The lower the smoother.

I have installed the less restricted air filter from Dyna...something or other. Will be interested in seeing if there is much difference.

I am interested in doing coast-downs to get a better idea on wind resistance, drive train power loss etc. The mileage on the interstate steady is unreal---43 gpm at steady 60 mph.

Looks like our map 0 numbers compare quite closely.

I may look at the Dragy. Can it track 70-0 mph times?

Have a good Thanksgiving.

Alex

[VipinLJ]

Hi,

My average SAE whp on map 0 is 227 whp (same run locations, 93 octane, and onsite weather data) and 233 uncorrected.

My average SAE whp on map 6 is 275 whp (same locations, 93 octane, and onsite weather data) and 294 uncorrected.

Using the OEM rating of 258 SAE chp, this shows a drive train, wind, rolling loss of 31 chp.

My favorite map setting on V17 is map6, variable boost starting at 3.5 psi and going to 8.5 psi over the rpm range. Gain is 15, ff 47, DB 50 to 89, and WGDC 50-99.

Even though I have no EWG wire connected, The FF curve and WGDC follow nicely and fairly closely. This setting also has kept the boost level high through the entire rpm range and without significant boost dip at higher rpms.

I am never quite sure about Terry's descriptions for each map. They appear inconsistent. So, I just experiment and see what happens with the output. Clearly you do not need the EWG wire to change WGDC and the DB setting will keep the boost higher where you want it. High gains make for very rough rides. The lower the smoother.

I have installed the less restricted air filter from Dyna...something or other. Will be interested in seeing if there is much difference.

I am interested in doing coast-downs to get a better idea on wind resistance, drive train power loss etc. The mileage on the interstate steady is unreal---43 gpm at steady 60 mph.

Looks like our map 0 numbers compare quite closely.

I may look at the Dragy. Can it track 70-0 mph times?

Have a good Thanksgiving.

Alex

Hey Alex

Looks like our cars have the same output on map 0. Iirc mine was also 225-230 corrected. I did it a long time ago. My map 6 without EWG was also around 275 iirc. Same as yours. With the EWG and pushing more boost, when I checked last, it was around 285-290 corrected (uncorrected it has shown upto 305 iirc).
I run absolute values on map 6. I have tried your numbers on my car and while it felt smoother, it didn't feel faster than the absolute values I run. I did dragy runs with your numbers a while back and it was only very slightly slower than my absolute value map 6. I like the kick in the back (compared to the smooth NA-ish feel from additive values). Which is why I went back to absolute.
I need to Google to see what chp is. Haha.
I had a K&N air filter but I've been running stock for a long time now. I didn't see any difference with it on. My next mod, if I buy the car, is a DP.
And yes. The mileage is amazing. I get like 35mpg when doing highway runs (speeds upto 85mph). When I cruise at 70mph, I've gotten upto 39mpg.

The dragy can record any values you want. In both MPH and KMPH. It has preset values (0-30/0-60/1/8th mile/quarter mile etc in MPH and similar in KMPH). You can set any custom values you want. It shows both acceleration and deceleration values. I'd suggest getting it from Amazon if you have Amazon prime. You can return it there if you don't like it.

Regards,
Vipin

[Zimbo 2]

hi everyone, have a 2021 M340i G21 with JB4 and OPF (petrol particulate filter).
I logged with Map1 and saw that it runs very lean at full load with AFR 14.50 ... is that normal?

[Peno718]

Map 4 and 5?

G20 M340i with stock ***

Can I run Map 4 or 5 with E30 fuel or would map 3 be the best performance for this setup?

[KnifeEdge87]

G20 M340i with stock ***

Can I run Map 4 or 5 with E30 fuel or would map 3 be the best performance for this setup?

a

G20 M340i with stock ***

Can I run Map 4 or 5 with E30 fuel or would map 3 be the best performance for this setup?

M340i runs with higher boost from factory already

Start with map 1 or 2 and post a log

There's not much difference between hardware on the Gen 1 and Gen 2 B58 (in regards to the parts that break like the pistons and rods)

The simple conclusion is that the limit with stock parts will be more or less the same, thus you have less room for improvement given you start from a higher base (380 as opposed to 340 hp)

With E30 the B48/58 platform can do ~21psi with the stock turbos and the fueling system will just about keep up, anything beyond that you're going to be looking at a turbo and fuel sys upgrade. This translates to about 450hp on the B58 and 300hp on the B48/B46 at the crank.

If your logs show timing is ok you can probably go straight to the flat 20psi boost map.

[Peno718]

a

M340i runs with higher boost from factory already

Start with map 1 or 2 and post a log

There's not much difference between hardware on the Gen 1 and Gen 2 B58 (in regards to the parts that break like the pistons and rods)

The simple conclusion is that the limit with stock parts will be more or less the same, thus you have less room for improvement given you start from a higher base (380 as opposed to 340 hp)

With E30 the B48/58 platform can do ~21psi with the stock turbos and the fueling system will just about keep up, anything beyond that you're going to be looking at a turbo and fuel sys upgrade. This translates to about 450hp on the B58 and 300hp on the B48/B46 at the crank.

If your logs show timing is ok you can probably go straight to the flat 20psi boost map.

I tried both maps, logs were good. I also dragy tested both maps and it appears map 3 performs better in 0-60. I'm guessing the stock cats create some backpressure and the higher you push boost the more backpressure which leads to worse performance?

[KnifeEdge87]

not sure what you mean

the marginal gain may not be as high but you're not going to get WORSE performance from more boost

[ipetey]

does anyone know…
with just jb4 on an m340 can you just add like 2-3 gallons e85 and use map 4 or do you need a specific setup? any advise here as i’m curious to try. currently on jb4 v16 running map 3

[Peno718]

not sure what you mean

the marginal gain may not be as high but you're not going to get WORSE performance from more boost

Right, More boost would make power in general up to a limit of course as u said. I was saying the exhaust restrictions with the cats, would make it less effective in pushing that boost. Turbos need less restrictions to spool and make big power. In my testing, the lower boost map made slightly better results.

[KnifeEdge87]

Right, More boost would make power in general up to a limit of course as u said. I was saying the exhaust restrictions with the cats, would make it less effective in pushing that boost. Turbos need less restrictions to spool and make big power. In my testing, the lower boost map made slightly better results.

What do you mean by better results?

Like acceleration times were better with Map 1 or 2 vs 3?

If that was true something bad is happening with your engine

[KnifeEdge87]

does anyone know…
with just jb4 on an m340 can you just add like 2-3 gallons e85 and use map 4 or do you need a specific setup? any advise here as i’m curious to try. currently on jb4 v16 running map 3

3 gallons e85 and 12 gallons 93AKI seems to work well for 20-21psi on the B## platform.

[ipetey]

3 gallons e85 and 12 gallons 93AKI seems to work well for 20-21psi on the B## platform.

so basically, nothing else needed. Like ewg harness, etc

[VipinLJ]

so basically, nothing else needed. Like ewg harness, etc

The ewg harness helps. I think bms says it's needed now.

[KnifeEdge87]

so basically, nothing else needed. Like ewg harness, etc

I'm told if you bought your jb4 recently the EWG harness is already included

Do you have 3 plugs or 2

[VipinLJ]

I'm told if you bought your jb4 recently the EWG harness is already included

Do you have 3 plugs or 2

Yes the new ones come with it preinstalled.

[Pnasty69]

Is it a known issue that the exhaust flap control doesn’t work with remote start? It stays closed when I remote start and the only way to open it is shut vehicle off and back on. Even if I park the car with it open as normal, when I remote start it, it actually closes. Thanks in advance. This is now my 5th car with jb4 loving it again

[RMM]

WMI cut with throttle closure

Does anyone know how to disable the JB4 WMI cut out on part throttle, form my logs I can see that when I am <60% throttle WMI is disabled.

My issue is that I am getting HPFP crashes and limp mode when running e40 at 12.5 AFR, yes I can run a higher AFR and avoid it, but then I get more timing corrections...

What happens is that when I am trying to modulate the throttle at high boost, like > 25psi at 5000rpm for example during the on off throttle transients the WMI cuts out, then HPFP crashes, and limp mode, its not often but very annoying

Note that under full throttle it is rock steady, not even a dip in the HPFP pressure, event up to 28psi at 5000 RPM

I can get a TU HPFP, but with WMI on the B48 is that really necessary?

One recommendation to JB4 developers would be to have a 2 step cutout, for example lets say 40% throttle cuts all the time, then 40-60% cuts only if <25psi pre throttle, as this is only an issue when running high boost

[Mikeym40]

What’s the best way to log? Do I drive regular or do a kickdown, 3 gear pull? Thank you!

[Steve @ BMS/Fuel-It!]

What’s the best way to log? Do I drive regular or do a kickdown, 3 gear pull? Thank you!

To properly evaluate the tuning, we'll need a full throttle JB4 log from 40-90mph on a safe private track.

[kinetic]

Since the V19 Firmware, there is a new feature

LagFix BETA (DWP)

Added in v19 and newer firmware this feature is used to boost pedal response and reduce turbo lag during routine driving. LagFix is enabled using the (mislabeled) DWP setting on the JB4 user adjustment page. A value of 0 disables the feature. A value of 100 is the "maximum effect". Most report values of 60-80 feel best behind the wheel so feel free to play around and see what works for your specific driving style.


My question is, where is that WDP setting?
Is it the Default Wastegate Position?

And what is the default setting for the TMAP on the B48 with the V22 Firmware?

[Jesse2667]

M340i b58 jb4 logs review

Want to make sure everything is running good ******* down pipes jb4 map5 e30
Here is my log.

[Terry @ BMS]

Fuel-IT came by the office yesterday with their new 2022 240xi development sled for a little JB4 dyno testing.

The car currently has a JB4, BMS intake, exhaust mod, and a Fuel-IT flex fuel sensor kit. Running an E30+91oct mix for all runs.

Best stock tuning run was 383whp / 395whp, best JB4 run was 461whp / 487wtq, running map5 with a peak boost of around 21psi. Impressive gains for such low boost! Dyno and log attached.

[Viggo]

very big problems with the JB4 box

Hello,
I currently have very big problems with the JB4 box. I don't know which map I should drive, so that the engine runs without misfiring.
My car is a 2017 540ix and no OPF. modifications: K&N in-box filter, M-Performance exhaust and 300 cell steel catalytic converter. I always fill up with 98 octane petrol.

I've tried map 1, 2 and 3 but the car jerks every time I drive hard. In Map 4 it doesn't jerk so much but with stop and go traffic, the car smells strongly of petrol.

Now JB4 is off so I drive with Map 0. What else can I try to enjoy the JB4.

thanks for your help!

[Slingray]

I've been reviewing my data logs as I'm feeling a dramatic surge under acceleration on MAP2, 98octane, newly installed high flow Active Autowerks catted ******** and cold IATs in an 2022 M240i G42 B58 Xdrive.

After reviewing the logs I have a situation where the Throttle closes rapidly and dramatically (from 100 to 27 - it is at 100% at 3,772RPM, 27% at 3,557RPM then back to 100% at 4,256RPM all in under 2seconds) and causing a surge in acceleration in the car. At the same time the ignition across all three cylinders is dropping from an average of 9 to 1. Boost also drops accordingly from averaging 9 to 5 (50% cut) - but all of this only occurring at that singular timestamp at 3,857RPM.

"40% or more throttle closure normally indicates that boost control adjustment is needed." - I'm seeing a throttle reduction of ~80% and IGN timing reduction of ~70% but only for that split second at 3,857RPM.

See here bolded and highlighted;


Screen-Shot-2022-06-02-at-9-11-23-am — ImgBB

https://ibb.co/V3VX73j


timestamp rpm ecu_psi target boost pedal iat wgdc throttle fp_h ign_1 avg_ign calc_torque trims dme_bt meth fp_l afr gear ff load clock map afr2 ign_2 ign_3 ign_4 ign_5 ign_6
7016.75 2872 3.3 0.6 3.7 40 97 50 52 28 15.8 9.8 19 21 0 0 47 14.3 2 50 6.4 10 2 0 15.9 15.9 15.9 16.8 16.3
7021.75 3425 5.6 4 10.4 100 95 50 100 29 9 8.9 34 47 7.6 0 64 15.8 2 50 11.5 9 2 0 7.9 7.7 6.8 6.5 6.5
7023 3772 8.5 4 13.1 100 95 50 100 29 1.1 7.6 37 49 6.8 0 71 14.4 2 50 13 9 2 0 1.3 0.8 0.8 1.6 1.7
7024.5 3857 8.4 4 12.2 100 95 50 27 29 9.9 7.5 31 44 5.8 0 71 14.4 2 50 13 9 2 0 1.3 0.8 0.8 1.6 1.7
7026.75 4256 8.4 4 12.2 100 95 50 94 29 9.9 7.5 31 44 5.8 0 68 13.4 2 50 9.8 9 2 0 10.9 14.2 16.6 16.6 7.8
7028.75 4647 9 4 13.5 100 94 50 100 28 8.5 8.5 40 42 13.1 0 78 15.2 2 55 13.6 9 2 0 11 14.5 14.5 14.5 14.5



I assume this indicates a momentary detonation control situation? Or could it be some sort of boost spike caused by a leak? Or simply traction control intervention (it doesn't feel like TC and I haven't observed the TC light coming on).

The car is definitely dipping in power momentarily and then surging back onto power, the acceleration is not linear in this scenario and feels problematic.

[Terry @ BMS]

You'd have to attach a CSV log to the post if you want us to review the tuning.

[bbbrrrx1]

Log review

Hi Terry & Team.

I’ve attached a log I took with a 2020 M340i & e30. Car is stock other than JB4. I recorded this log using your recommended map 6 settings. Can you please review and provide feedback? At the end of the log I’m at 100% throttle from 1st through 3rd gear.

Prior to running this map, I ran map 4 with e30 for 2 years & 20k miles with no issues.

Thanks in advance!

[themitigating]

Burble and crackle adjustment

Hi,

My car currently has the stock ********. I read that burble exhaust tunes may cause issues for the O2 sensors and catalytic converters due to unburnt gas. I currently run map2.

Is there a way to disable the crackle and burble tune but maintain the boost pressure? If not can you reduce it?

[Enzo2003]

Hi everyone.

I'm brand new to this, like the ink hasn't dried yet. Have a 2019 440i Convertible and installed the JB4 last weekend. Since then i have updated to firmware V22 per Terry's recommendations. As I was reading through the previous firmware updates (V18, V19, V20 and V21) I saw this new feature in V19 where the DWP setting could be used to boost the the pedal response and reduce turbo lag during routine driving. If i use this option and set it to i.e. 60, does that also affect the pedal response in all driving modes (comfort, sport, sport+) so when I want to drive more aggressively I should set it back to 0?

Also, inV19 it says there's been an adjustment to the IAT spoofing and it's suggested to turn this on in Options Bit 2. Does this affect performance, or is this just for data logging?

Appreciate all the help i can get.

[RMM]

Hi so I hacked, shimmed and repinned a 3.5bar N20 TMAP to my manifold TMAP. So both pre and post throttle can read 3.5bar . Put n20 cal in my BM3 tune and looks to work well so far, BM3 logs look correct reading 30 psi on both MAP as expected.

However the JB4 is still logging and reading the 2.5 calibration, will this case any issues with JB4 operation, meaning is the manifold TMAP used in boost control or wmi?

Also is there an option to update cal to get it to log correctly?

FYI hope this will solve some TC issues and throttle position plausibility codes i am getting. I know its not used for boost control but its definitely important for throttle control as the ECU uses the pressure differential pre and post throttle as part of the throttle control maps.

[RMM]

Quick follow up. The JB4 seems to be working just fine with the 3.5 bar manifold mounted N20 TMAP, just the logs show about 11psi lower pressure then actual, but it does not appear to impact the way JB4 works in any way I can tell.

On codes, I still got the throttle plausibility code (101F01) after a few days, and also got a new code related to intake manifold pressure too high, (CDC10C), however after I suppressed these in the BM3 tune they have not reappeared and they do not trigger limp mode so that seems fine.

On TC, it looks like this did solve my main issue with TC code that would appear if I really hit the TC hard, like for more then 1-2 seconds of wheel spin, it would go into limp mode, so that was the main thing I wanted as even if I suppressed this code in BM3 it would still trigger limp mode but just didnt throw check engine light on dash which doesn't help.

[Pineconeliquor]

Is this a more appropriate place to ask for a log review?
2022 b58 supra w/ ***'d dp and mst intake running 93octane

[NBystrov]

Hi all! I have already figured out enough with the JB4, but I encountered methanol for the first time and I have questions about setting it up
I installed a system from BMS with two bm7 injectors, while I use methanol 50/50, I use soft mhd st2 with a 14 angle as a back and blow up to 20psi using methanol. My methanol settings are standard: Additive 40 Scaling 60 Start psi 8 tell me what the Additive and Scaling items answer for?
Yes, I have a standard turbo

[tvw]

Hi All

wondering if anyone can provide some input on the issue I'm experiencing with my b58 JB4

Map 4 -5 and 6 (absolute values ) never seem to reach target boost no matter how low/high the boost is set to .

When I use additive values all works fine and I get 17 - 18 psi .

Map 1 and 6 Log attached

I have EWG connector connected .

PID gain set to 20
FF set to 50

Terry @ BMS I sent over an email with the data as well .

[mike082802]

just got done installing a Dynamic Autowerks turbo ans tu pump in my f30 340i, does anyone have a starting point for the jb4 user settings for map 6? Map 1,2, and 3 logs looked good. also have a dorch stage 2 hpfp waiting to go in but wanted to max out the tu pump first.
thanks

[[email protected]]

Hi everyone I’m new here so sorry if my question is a repeat or in the wrong place.
I have a 2023 bmw m240 xdrive with the following modes, Eventuri intake and miltek catted down pipe . I have a jb4 and I not sure what map to run, can someone tell me?
thanks

[ravits]

2018 x3m40i with jb4 & knn drop intake on map3

am planning to do a vrsf ******** upgrade to my stock

do i need to do any additional tuning with jb4 or jus map 3 it will auto adjust everything ?

Sorry am totally new to jb4 doesnt know how it really works been running on it for past 3 years on map 3 since stock .

[jhl422]

Hi All

wondering if anyone can provide some input on the issue I'm experiencing with my b58 JB4

Map 4 -5 and 6 (absolute values ) never seem to reach target boost no matter how low/high the boost is set to .

When I use additive values all works fine and I get 17 - 18 psi .

Map 1 and 6 Log attached

I have EWG connector connected .

PID gain set to 20
FF set to 50

Terry @ BMS I sent over an email with the data as well .

I’m experiencing this same issue. Has this been resolved?

[Steve @ BMS/Fuel-It!]

It's always best to start a thread with logs for your particular car/situation...posts get lost in this thread.

[jhl422]

It's always best to start a thread with logs for your particular car/situation...posts get lost in this thread.

Will do.

[ravits]

Steve @ BMS
Ride x3m40i
map 3
oct 93
need help on logs for improvement on daily drive

mods on ride
stock airbox with knn drop in filter
Vrsf 200 cell hi-flow ********
looking for improved daily drive 0 -150km pull as currently low end feels abit sluggish due to new ******** installed.
JB4 Mobile Logs (32030LA45583)