B58 gains with JB4

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polfa
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B58 gains with JB4

Post by polfa » Mon Oct 01, 2018 10:27 am

hi guys

i was wondering if anyone who tried JB4 on b58 (i got m240) could share where is the biggest gain? i know all the numbers and read multiple topics but im more interested in what it feels like?

say do you notice massive increase in acceleration 0-60? or is it the torque in every gear?

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Mcf00
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Re: B58 gains with JB4

Post by Mcf00 » Mon Oct 01, 2018 8:42 pm

I’m also interested in the 0-60 and 0-100 changes with the JB box!

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Re: B58 gains with JB4

Post by jason@bwchiptune » Tue Oct 02, 2018 12:52 am

Image

This is what we have seen on m140i with jb4 fitted

We can also remap these with an extra 50-65 Bhp extra

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Mcf00
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Re: B58 gains with JB4

Post by Mcf00 » Tue Oct 02, 2018 2:14 pm

Useful info, but very little on the differences in the 0-60 and 0-100 timings, which could be the real world differences outside of a dyno rig.

I appreciate tyres, weather, fuel and even differences in each engine can change this, but what’s the average increase or improvement in 0-60/0-100 timings?

Or are there no differences due to power delivery in gears averaging out?

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Re: B58 gains with JB4

Post by Williams327 » Wed Oct 03, 2018 8:47 am

Mcf00 wrote:
Tue Oct 02, 2018 2:14 pm
Useful info, but very little on the differences in the 0-60 and 0-100 timings, which could be the real world differences outside of a dyno rig.

I appreciate tyres, weather, fuel and even differences in each engine can change this, but what’s the average increase or improvement in 0-60/0-100 timings?

Or are there no differences due to power delivery in gears averaging out?
Where did you get this idea?

My tuned M140i now does 0-60 in 3.9 seconds 60-100mph in 3.93 seconds 100-200kmh in 7.8 seconds.

That’s fare superior to any stock M140i
M140i 3 door Auto

Mods - Dervtech, JB4, LSD, underbody brace, BCS catback, Decat, AFE intake, auto id mirrors>diffuser, kerscher splitter, carbon spoiler, Mp skirts>blades>grills, OZ ultraleggeras, H&R -25mm, M4 pads, braided lines

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Re: B58 gains with JB4

Post by n54_liam » Wed Oct 03, 2018 4:05 pm

I don't have any dragy times or magazine times times, but do have personal 1/8 and 1/4 mile results. I managed 1/8 mile in 8.0 seconds at 92.9 mph. so would assume 0-100 of 9?
Which is probably close to a second quicker than stock.
This is on an M140 with JB4 only.
Current: 66 AW M140i 8AT. - Double slat grills.
Previous: LMB loaded 135i - JB4 - VRSF DP - AIRTEC IC - FORGE BOV + CP - DCI - CDV - PCV - CARBON

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Re: B58 gains with JB4

Post by polfa » Wed Oct 10, 2018 5:56 pm

Williams327 wrote:
Wed Oct 03, 2018 8:47 am
Mcf00 wrote:
Tue Oct 02, 2018 2:14 pm
Useful info, but very little on the differences in the 0-60 and 0-100 timings, which could be the real world differences outside of a dyno rig.

I appreciate tyres, weather, fuel and even differences in each engine can change this, but what’s the average increase or improvement in 0-60/0-100 timings?

Or are there no differences due to power delivery in gears averaging out?
Where did you get this idea?

My tuned M140i now does 0-60 in 3.9 seconds 60-100mph in 3.93 seconds 100-200kmh in 7.8 seconds.

That’s fare superior to any stock M140i
how did you measure this 3.9 mate?

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Re: B58 gains with JB4

Post by Williams327 » Wed Oct 10, 2018 7:55 pm

All measured on draggy so very accurate :mrgreen:

Image

Image

Image
M140i 3 door Auto

Mods - Dervtech, JB4, LSD, underbody brace, BCS catback, Decat, AFE intake, auto id mirrors>diffuser, kerscher splitter, carbon spoiler, Mp skirts>blades>grills, OZ ultraleggeras, H&R -25mm, M4 pads, braided lines

polfa
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Re: B58 gains with JB4

Post by polfa » Thu Oct 18, 2018 6:05 pm

awesome - did you encounter any problems with Jb4 so far?

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Mrpink
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Re: B58 gains with JB4

Post by Mrpink » Fri Oct 26, 2018 6:58 pm

I have many JB4 customers now, all with no issues
M140 - Pure stage 1 turbo - JB4 - De-cat - BMS dual CM7 meth kit - AP intake - KW Street comfort coilovers

Official Burger Motorsport, VRSF, FTP & Boostane supplier

https://www.slnperformance.co.uk

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Re: B58 gains with JB4

Post by Ezzra » Fri Oct 26, 2018 9:31 pm

I can tell you what you've lost. Your warranty! :lol:
"You cannot sedate, all that you hate".

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Re: B58 gains with JB4

Post by kriszty » Sat Oct 27, 2018 8:44 pm

jb4 can be removed if wanted , so warranty is not really an issue , JB4 is still a very good product , has some good gains and is easy to install, together with a downpipe pushing more then 400pk ..

polfa
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Re: B58 gains with JB4

Post by polfa » Sat Nov 03, 2018 1:59 pm

well i am looking to buy one but just wondered if worth it as apparently if something failes BMW can find out you had jb4 on it even after you take it off :(

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Re: B58 gains with JB4

Post by NVM » Thu Nov 08, 2018 2:22 pm

https://www.youtube.com/watch?v=t-N77gsMlRM average 410-430 bhp with decat and jb4
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