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Technical Topics B58 6-Cylinder Turbo Engine / Drivetrain / Exhaust Modifications JB4 on 2021 M340i

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      10-27-2020, 12:42 PM   #23
M340i Pride
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So this pops up randomly in my youtube feed. seems like hella fast. what do you guys think on this video??

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      10-27-2020, 07:02 PM   #24
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Quote:
Originally Posted by M340i Pride View Post
So this pops up randomly in my youtube feed. seems like hella fast. what do you guys think on this video??
The guy is basing his speed off the speedo which isn't very accurate. I think expected 0-60 times are in the 3.5s range with the JB4 on an xdrive model.
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      10-28-2020, 06:41 AM   #25
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As an update, I got my 2 other summer tires in. It's now 30 degrees outside I have been running map 0 and the topend feels better to me. Maybe placebo.
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      10-28-2020, 06:48 AM   #26
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It's placebo, I tested this at the drag strip. Invite you to do the same.
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      10-28-2020, 08:39 AM   #27
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Quote:
Originally Posted by RoyB View Post
As an update, I got my 2 other summer tires in. It's now 30 degrees outside I have been running map 0 and the topend feels better to me. Maybe placebo.
Map 0 is the stock map. So technically you shouldn't be feeling any difference since it basically means the JB4 isn't working yet. Map 1 on you should feel a difference.
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      10-28-2020, 08:45 AM   #28
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We need two volunteers one with a JB4 the other stock and have them do a couple of runs and see if there is some real world difference.
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      10-28-2020, 11:00 AM   #29
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Originally Posted by possible335i2008 View Post
We need two volunteers one with a JB4 the other stock and have them do a couple of runs and see if there is some real world difference.
7mph gained is a HUGE difference....

https://g20.bimmerpost.com/forums/sh...5&postcount=22
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      10-28-2020, 11:29 AM   #30
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Quote:
Originally Posted by Fuel-It! View Post
Quote:
Originally Posted by possible335i2008 View Post
We need two volunteers one with a JB4 the other stock and have them do a couple of runs and see if there is some real world difference.
7mph gained is a HUGE difference....

https://g20.bimmerpost.com/forums/sh...8;postcount=22
Yeah but I think an independent test (non-bms personnel/sponsored people) would lend way more credibility. There seems to be a worry the jb4 is ineffective on this platform.
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      10-28-2020, 12:31 PM   #31
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Quote:
Originally Posted by possible335i2008 View Post
Yeah but I think an independent test (non-bms personnel/sponsored people) would lend way more credibility. There seems to be a worry the jb4 is ineffective on this platform.
I agree - while I appreciate the information resellers and partners such as Fuel-It!, X-PH etc....of Burger share here regarding JB4, JB+ It would be nice to see an average Joe (or Jill) do a simple before and after on a dyno.

I have a dyno day coming up with my Son in about a month to test an ActiveAutowerke intercooler and an intake on his 328 - who knows maybe I can find someone to come join us and put their car on the rollers?
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      10-28-2020, 12:49 PM   #32
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Quote:
Originally Posted by chenry View Post
Quote:
Originally Posted by possible335i2008 View Post
Yeah but I think an independent test (non-bms personnel/sponsored people) would lend way more credibility. There seems to be a worry the jb4 is ineffective on this platform.
I agree - while I appreciate the information resellers and partners such as Fuel-It!, X-PH etc....of Burger share here regarding JB4, JB+ It would be nice to see an average Joe (or Jill) do a simple before and after on a dyno.

I have a dyno day coming up with my Son in about a month to test an ActiveAutowerke intercooler and an intake on his 328 - who knows maybe I can find someone to come join us and put their car on the rollers?
That would be awesome, real data is better than anything. If mission was local to me I would probably do the whole flash thing but mailing your ecu is just crazy, I mean packages are lost every day and not treated very well. So in reality the jb4 would be a better option by far, but not if it doesn't really do anything.
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      10-28-2020, 01:09 PM   #33
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Quote:
Originally Posted by VipinLJ View Post
Map 0 is the stock map. So technically you shouldn't be feeling any difference since it basically means the JB4 isn't working yet. Map 1 on you should feel a difference.
Yes I know. I was comparing map 0 to map 2/3.
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      10-28-2020, 01:11 PM   #34
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Originally Posted by Fuel-It! View Post
7mph gained is a HUGE difference....

https://g20.bimmerpost.com/forums/sh...5&postcount=22
Yes, from the company that sells the product.... which I always take with a grain of salt. They are the only people showing real gains it appears.
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      10-28-2020, 01:14 PM   #35
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Quote:
Originally Posted by possible335i2008 View Post
Yeah but I think an independent test (non-bms personnel/sponsored people) would lend way more credibility. There seems to be a worry the jb4 is ineffective on this platform.
The JB4 works very well for the platform but octane plays a role, as do JB4 settings, whether or not an EWG connector was added, etc. One of the nice features of the JB4 is they provide free tuning advice so anyone can email in a JB4 log if they think their car isn't running as fast as it should be for advice to speed it up.
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      10-28-2020, 01:23 PM   #36
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Quote:
Originally Posted by RoyB View Post
Yes, from the company that sells the product.... which I always take with a grain of salt. They are the only people showing real gains it appears.
There seems to be plenty of customer videos and data posted as well for what it's worth. This one came up on my youtube today.



Those who have performance issues usually have some issue that needs to be resolved. I had one customer who set something wrong and his JB4 was never turning on. So if it's not doing what you want post up the logs for advice on why. Usually an easy fix.

I'm sure everyone has seen the dyno of the independent Fuel-IT Z4 testing which is the same engine/tuning as the M340.
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      10-28-2020, 01:34 PM   #37
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Quote:
Originally Posted by Fuel-It! View Post
There seems to be plenty of customer videos and data posted as well for what it's worth. This one came up on my youtube today.



Those who have performance issues usually have some issue that needs to be resolved. I had one customer who set something wrong and his JB4 was never turning on. So if it's not doing what you want post up the logs for advice on why. Usually an easy fix.

I'm sure everyone has seen the dyno of the independent Fuel-IT Z4 testing which is the same engine/tuning as the M340.
I've sent logs and screen shots of the settings to Terry for review. He said all is correct and looks good. I don't have EWG hooked up yet which is why I asked if those that are showing gains have it hooked up or not. I am not that concerned about it since I have not done testing on different maps yet.
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      10-28-2020, 06:38 PM   #38
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Quote:
Originally Posted by RoyB View Post
I've sent logs and screen shots of the settings to Terry for review. He said all is correct and looks good. I don't have EWG hooked up yet which is why I asked if those that are showing gains have it hooked up or not. I am not that concerned about it since I have not done testing on different maps yet.
We can see from the customer posted JB4 videos that there clearly isn't any general JB4 performance problem on the M340. So if there is an issue it's specific to your car. It should be able to be identified with good back to back logs. Do a 1/4 mile run on map0 and record on dragy/JB4, the same on whatever performance map you use, and from that data should be able to figure out what's going on specifically to get you on the path to faster performance.
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      10-29-2020, 06:56 AM   #39
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Quote:
Originally Posted by Fuel-It! View Post
We can see from the customer posted JB4 videos that there clearly isn't any general JB4 performance problem on the M340. So if there is an issue it's specific to your car. It should be able to be identified with good back to back logs. Do a 1/4 mile run on map0 and record on dragy/JB4, the same on whatever performance map you use, and from that data should be able to figure out what's going on specifically to get you on the path to faster performance.
Are you a spokesman for JB4 or something? What's the deal.
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      10-29-2020, 10:53 AM   #40
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Run them on all of our cars (including our Z4 B58 making almost 500whp without a BEF) and work with customers daily running them so we know they work well. Just trying to get you on the right path. You said "they are the only people showing gains" which is clearly not true so I just posted a video that I saw in my youtube link refuting that statement.
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      10-29-2020, 11:01 AM   #41
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Quote:
Originally Posted by RoyB View Post
Are you a spokesman for JB4 or something? What's the deal.
It is a well-known non-hidden fact that Fuel-It! is a close working partner of JB4/Burger Motorsports. If you simply go to Burger Motorsports you will clearly see their products as an option right there next to JB4 etc.

https://burgertuning.com/

My point is I don't think they are trying to hide anything

**edit** Thinking about this a bit more, my apologies, I do see how if you are not familiar with Fuel-It! products you may think that their user name is just something that an individual chose and is not their business name. I do see how that could be confusing....especially if you are new to the forums or the BMW aftermarket

Last edited by chenry; 10-29-2020 at 11:36 AM.. Reason: Added **edit**
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      11-18-2020, 06:01 PM   #42
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Quote:
Originally Posted by RoyB View Post
I was able to update the firmware from my S58 JB4 to B58 and put the JB4 on my M340i. It made a decent difference on my X3M. I felt it more going backwards (taking it off and going to stock) vs putting it on.

So far I am not sure if it's working. I sent the logs for Map 2 and 3 to Terry and he said it all looks good. From what I can gather, it is sending more boost than stock.

However, I ran a quarter mile test on Draggy in Map3 and the results were less than impressive.

0-60 on the all seasons seemed to move the car really good. It peeled out a bit and launched pretty hard. I tried launch control but not sure if it activated since I did not see it on the dash. I find it hard to believe it would do a 3.8 0-60 without it though.

The 12.14 @ 112 seems like a stock time from the little bit of time slips I have seen posted. Running a conversion from 1/8 to 1/4 it's spot on- 7.8 1/8= 12.17 1/4. 112mph tells me the car isn't making much power over stock, if any.





I'll have to do some more testing to see if changing between maps makes any difference vs stock. Since I have a baseline 1/4 run I should be able to get away with doing 1/8 passes now, which is obviously much easier to accomplish.
Is it possible the MY21 is hampered by the mild hybrid engine and tuning for it versus the 2020?
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      11-18-2020, 10:20 PM   #43
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Is it possible the MY21 is hampered by the mild hybrid engine and tuning for it versus the 2020?
No, my 2020 acts the same way. After a couple pulls the power returns to factory. Verified with back to back passes at the drag strip and with dragy.
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      11-19-2020, 07:20 AM   #44
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I did get my summer tires mounted up finally. However, it's been 40s here lately so not sure how much traction I will get on full launch. SOON I will test!
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