[M40iSFR]

Does anyone have the technical facts, not vague descriptions, of how JB4 works?

[possible335i2008]

Originally Posted by M40iSFR

Does anyone have the technical facts, not vague descriptions, of how JB4 works?

Check out n54tech.com; the developer and his team moderate that website they can answer all your questions there

[chenry]

Originally Posted by possible335i2008

Check out n54tech.com; the developer and his team moderate that website they can answer all your questions there

+1

[mike@x-ph.com]

It tricks the ECU to make changes to some parameters (boost, AFR, timing,etc...)

It also connects to Canbus which gives it the ability to add features like boost by gear, boost by RPM, safety failsafe,etc...

[VipinLJ]

Can the jb4 work without the obd connection? I read somewhere were they say it can and the obd connection is only for the gauge control thing. Like switching using the built in stalks and speedometer gauge

[M40iSFR]

Originally Posted by mike@x-ph.com

It tricks the ECU to make changes to some parameters (boost, AFR, timing,etc...)

It also connects to Canbus which gives it the ability to add features like boost by gear, boost by RPM, safety failsafe,etc...

Yes, I was looking for the figures, or there abouts, of what is changed for each map.

[mike@x-ph.com]

Originally Posted by M40iSFR

Yes, I was looking for the figures, or there abouts, of what is changed for each map.

Map0: Stock tuning, fully disable JB4
Map1: Additive map with peak of 3psi over stock added (91 octane)
Map2: Additive map with peak of 4psi over stock added (91-93 octane)
Map3: Additive map with peak of 6psi over stock added (93+ octane)
Map4: Additive map with peak of 6.5psi over stock added (93+ octane)
Map5: Additive map with peak of 6psi over stock added & more aggressive timing profile for higher octane fuel (experimental, 93+ octane, bolt on modifications)
Map6: Custom tuning map allowing both additive (below 10psi) and absolute (above 10psi) targeting
Map7: WMI map (boost varies based on WMI additive and map settings)
Map8: VALET / Low Boost Map

[M40iSFR]

Hi Mike

Thanks for the continued replies. I've seen those figures, but, maybe I'm reading them wrong here, is the 3psi for Map1 just in increase in turbo pressure - no change to timing or anything else?

The reason I ask is, I had my old car remapped - reprogrammed ECU. The gearbox spat a tooth shortly after.

I'd like to get a better understanding of what is actually changed before I risk the same decision again. I know the B58 in my G29 Z4 M40i can do a lot better though!

[mike@x-ph.com]

Originally Posted by M40iSFR

Hi Mike

Thanks for the continued replies. I've seen those figures, but, maybe I'm reading them wrong here, is the 3psi for Map1 just in increase in turbo pressure - no change to timing or anything else?

The reason I ask is, I had my old car remapped - reprogrammed ECU. The gearbox spat a tooth shortly after.

I'd like to get a better understanding of what is actually changed before I risk the same decision again. I know the B58 in my G29 Z4 M40i can do a lot better though!

You might want to ask Burger Tuning directly for a better answer but from my understanding yes you are correct. Map 1 will pretty much add 3 psi of boost to stock

[possible335i2008]

Originally Posted by M40iSFR

Hi Mike

Thanks for the continued replies. I've seen those figures, but, maybe I'm reading them wrong here, is the 3psi for Map1 just in increase in turbo pressure - no change to timing or anything else?

The reason I ask is, I had my old car remapped - reprogrammed ECU. The gearbox spat a tooth shortly after.

I'd like to get a better understanding of what is actually changed before I risk the same decision again. I know the B58 in my G29 Z4 M40i can do a lot better though!

Why don't you got to n54tech and ask the guy who makes it? I mean that's the real source of info, unless you trying to not get the best source of info?

[carbon428i]

Does anybody know what's needed for Map 4? Is it ok to run on a stock 2019 m340i? Looking for max power without upgrading anything.. thanks

[Fuel-It!]

Originally Posted by carbon428i

Does anybody know what's needed for Map 4? Is it ok to run on a stock 2019 m340i? Looking for max power without upgrading anything.. thanks

The JB4 includes full diagnostics in the app so record ad JB4 log and post it here and I can tell you if it looks safe or not. The map used has mostly to do with the octane being used and what the factory software is.

[VipinLJ]

Originally Posted by Fuel-It!

The JB4 includes full diagnostics in the app so record ad JB4 log and post it here and I can tell you if it looks safe or not. The map used has mostly to do with the octane being used and what the factory software is.

Will you be kind enough to do that for a measly 330i as well? I’m running map 2 now with ~E30 mix. I wanna know if map 3 is better because sometimes, I feel map 3 is better and at other times, map 2 seems to pull harder. No other mods other than a JB4.

[Fuel-It!]

Sure post it up

[M340_pilot]

Can I manipulate the oil and coolant temperatures and/or disable the cold start procedure with the JB4?

[VipinLJ]

Originally Posted by Fuel-It!

Sure post it up

I just realised you can't post .csv here

[lucasmiller2015]

Originally Posted by VipinLJ

I just realised you can't post .csv here

Get an account on datazap.me, upload the csv there (make sure it's set to public), and post the link here

[VipinLJ]

Originally Posted by lucasmiller2015

Get an account on datazap.me, upload the csv there (make sure it's set to public), and post the link here

Yes sir. Will do

Edit - https://datazap.me/u

Let me know if that works

Edit 2 - https://datazap.me/u/vipinlj/logging-run?log=0&data=1-4

https://datazap.me/u/vipinlj/logging...log=0&data=1-4

[Fuel-It!]

Originally Posted by VipinLJ

Yes sir. Will do

Edit - https://datazap.me/u

Let me know if that works

Edit 2 - https://datazap.me/u/vipinlj/logging-run?log=0&data=1-4

https://datazap.me/u/vipinlj/logging...log=0&data=1-4

Do a log on map4 also, which is an absolute target map around 20psi target, close to what you're hitting on map2 here.

[VipinLJ]

Originally Posted by Fuel-It!

Do a log on map4 also, which is an absolute target map around 20psi target, close to what you're hitting on map2 here.

Yes sir. Will do. I’ll post that up as soon as I get logs

[Shmoked]

Any1 running the jb4 currently? is it worth it? Just picked up my car last week trying to decide what route to take

[Fuel-It!]

Originally Posted by Shmoked

Any1 running the jb4 currently? is it worth it? Just picked up my car last week trying to decide what route to take

It's been out since 2008 lol. If you want a lot of power and features without having to void warranty with a flash the JB4 is the best way to get there. If you want exhaust pops and bangs you're going to have to bite the bullet and reflash it.