JB4 for M3/M4/M2C S55 - Page 78 - N54Tech.com

Customtech · 02-10-2019, 12:49 PM

Hi Terry, in our M4 race car we are limited BHP per ton, I’m looking to make 464 BHP max
I will be on the dyno in about a week, if I use your BEF what sort of power is that likely to make?
What map number would I use?

Terry @ BMS · 02-10-2019, 02:17 PM

Sure, use JB4 map6 to set whatever boost profile you want to keep power where it needs to be!

TideMD · 02-10-2019, 09:24 PM

Quote:

Originally Posted by Customtech

... if I use your BEF what sort of power is that likely to make?

I’ve also wondered about this for my setup. Not looking for exact numbers, but just a relatively close WAG of the whp / wtq, since I don’t have access to a dyno to truly see what the car is putting down.

Zimbo 2 · 02-19-2019, 03:42 AM

Hi, which spark plugs should I use if I've used JB4 and often drive Map 2 and 6?

Drminor1988 · **Second hand JB4 -** 02-21-2019, 02:56 PM

Hey,
Bought a second hand jb4 for my F80. I read that newer ones need to be VIN unlocked before installing on a different vechile is this true? It has the Bluetooth connection.

Thanks,
Kyle

Terry @ BMS · 02-22-2019, 11:05 AM

The JB4 does not vin lock.

Terry @ BMS · 02-22-2019, 11:06 AM

Quote:

Originally Posted by Zimbo 2

Hi, which spark plugs should I use if I've used JB4 and often drive Map 2 and 6?

2step colder NGK's gapped to 0.020"

https://www.burgermotorsports.com/pr...ch-price-15-00

Drminor1988 · 03-03-2019, 08:43 AM

Hey Terry,
I installed the jb4 on my f80 about two weeks ago and I just noticed that my high beam assist isn’t turning on from the stalk, and when i turn my high beams on by pushing the stalk forward the high beam light on the dash isn’t turning on, it does turn on when my pull the stalk back though. Any idea how to resolve the issue?

Drminor1988 · 03-03-2019, 03:18 PM

scratch that, unplugged he OBEII cable and plugged it back in and fixed the high beam issue.

Terry @ BMS · 03-03-2019, 05:13 PM

Quote:

Originally Posted by Drminor1988

Hey Terry,
I installed the jb4 on my f80 about two weeks ago and I just noticed that my high beam assist isn’t turning on from the stalk, and when i turn my high beams on by pushing the stalk forward the high beam light on the dash isn’t turning on, it does turn on when my pull the stalk back though. Any idea how to resolve the issue?

Sometimes phantom issues like that pop up when disconnecting the battery and resolve themselves after a day or two.

J2R · 03-06-2019, 06:02 AM

Terry, i updated my firmware to last test 11 file, and now wheen the boost come, it dont reach the target, all times midle rpm in wot it hesit to reach the target, like a open/ close the wg varios times.

Im using a rev 2 Bluetooth to uptade firmware and log, it work in f80?

J2R · 03-06-2019, 08:46 AM

Other logs. Boost is instable wheen coming

Terry @ BMS · 03-06-2019, 10:49 AM

FUD.5 off, duty bias all to 50, to start.

Kidd2410 · 03-07-2019, 04:02 AM

Hi Terry,

I was looking to get myself another JB4 for the S55 this time since it was awesome with the B58 in my 340i!

I’ve seen that the JB4 module is fully compatible with the S55 in the M2C however I was wondering if the OPF we have over in the EU changes anything?

jdvieira · 03-07-2019, 08:18 AM

Quote:

Originally Posted by Kidd2410

Hi Terry,

I was looking to get myself another JB4 for the S55 this time since it was awesome with the B58 in my 340i!

I’ve seen that the JB4 module is fully compatible with the S55 in the M2C however I was wondering if the OPF we have over in the EU changes anything?

Sent you a PM, Kidd2410.

Zimbo 2 · 03-08-2019, 08:34 AM

Hey guys,
if I'm allowed to mix up to 30% E85 on the S55 with JB4 Stage 3. How much % E100 can I give then? When I had 30% E100 to 102 octane, my trims were way too high at 47-50 ...

Terry @ BMS · 03-08-2019, 11:20 AM

Let's see the log, because open loop can also be raised to 70 to help on trims. If you want we also have the back end flash to allow full 100% E85.

Zimbo 2 · 03-08-2019, 11:54 AM

Thanks terry for help...
yes I will again send a log on E100 ... Map 2?! But FOL 70 I have often had emergency program ...

JB4-M4 · 03-20-2019, 11:01 AM

@Terry: What do you think of my log?
Settings: M3 F80, MPE, Shell Vpower, Map2.
Thank you!

https://s17.directupload.net/images/190320/asm4i32x.png
https://s17.directupload.net/images/190320/652jnd2s.png
https://s16.directupload.net/images/190320/qnjp5jee.png
https://s17.directupload.net/images/190320/vdt9omhu.png

Greetings to Zimbo 2 :D the world is a small place.

Terry @ BMS · 03-20-2019, 11:36 AM

Attach the CSV here!

JB4-M4 · 03-20-2019, 11:47 AM

I cannot, because its too large. Sorry for iPhone resolution.

JB4-M4 · 03-20-2019, 12:04 PM

Now it works. Thanks!

JB4-M4 · 03-22-2019, 06:12 PM

Should the boost line close to the target?

Terry @ BMS · 03-22-2019, 08:11 PM

Quote:

Originally Posted by JB4-M4

Should the boost line close to the target?

It's a very short log but map2 here is an additive map, so that boost target is added to the stock boost as a request. All looks like it's working as it should be here.

nrvous · **Map7 with 92octane and Torco? -** 03-23-2019, 05:46 PM

So Torco says with 5 gallons of 91 octane and 16oz Accellerator, that makes 101 octane. I am on 92 so that'd make 102 octane.

My understanding is Map7 is race fuel (assumedly 100+ octane). So is 92 plus enough torco the same?

Here is their chart:
https://cdn.shopify.com/s/files/1/00...60390944159411

There is no E85 within 40 miles. Race fuel is also hard to get around here. I can get trick 101 unleaded but Torco accellerator is way more convenient if same/similar