New 2009 2010 BMW Z4 - ZPOST
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   New 2009 2010 BMW Z4 - ZPOST > BMW Z4 Forum (E89) > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications

Post Reply
 
Thread Tools Search this Thread
      02-22-2011, 04:37 AM   #1
solidgold
Private
10
Rep
82
Posts

Drives: Z4 E89
Join Date: Feb 2010
Location: Singapore

iTrader: (0)

JB4 upgrade

Understand that JB4 for E89 is out. Comes with full mapping integration with dashboard display. Not sure is it a worthwhile upgrade? Anyone tried and see improvement in torque or bhp?
Appreciate 0
      02-22-2011, 11:23 AM   #2
KINetics
Enlisted Member
1
Rep
42
Posts

Drives: Z4 sDrive35i
Join Date: Aug 2008
Location: Irvine, CA

iTrader: (1)

Quote:
Originally Posted by solidgold View Post
Understand that JB4 for E89 is out. Comes with full mapping integration with dashboard display. Not sure is it a worthwhile upgrade? Anyone tried and see improvement in torque or bhp?
Installed it this weekend. Running Map 1, which I believe is the equivalent to the JB3 Map 3.

Never dynoed my car so I couldn't tell you.

However, with the JB3, if I quickly accelerated (manual transmission) and did a quick shift into 2nd, there would be some jerkiness felt as through 2nd gears powerband before shifting into 3rd.

With JB4, I don't feel that. Don't know if I've really pushed it in 2nd yet to do a fair comparison.

My butt dyno says there is an improvement, but that might just be my mind justifying paying $150 for the upgrade. (I bought by JB3 used).
Appreciate 0
      02-24-2011, 03:10 PM   #3
persian54
Lieutenant General
persian54's Avatar
United_States
922
Rep
15,818
Posts

Drives: M760/G83M4
Join Date: Jun 2009
Location: The Valley, SoCal

iTrader: (298)

i dynoed my Z4 with the JB4 Beta

My car was used to help tune the DCT maps for the Z4

353 whp and 349 whq

base was 287whp and 282wtq

JB4 only
no other modifcations
91 octane gas

55 degrees

if you want one new, let me know, i can ask around. I know a lot of people
Appreciate 0
      04-28-2011, 03:28 PM   #4
.chris
Registered
0
Rep
3
Posts

Drives: Z4 sDrive35i
Join Date: Apr 2011
Location: Germany

iTrader: (0)

Quote:
Originally Posted by persian54 View Post

My car was used to help tune the DCT maps for the Z4

Are they special maps for DCT or detects the JB4 DCT and switch the map into "DCT" mode ?
Appreciate 0
      06-10-2011, 08:48 PM   #5
BLTZKRG
Private
BLTZKRG's Avatar
United_States
11
Rep
93
Posts

Drives: 2003 M5
Join Date: Jun 2011
Location: NJ

iTrader: (0)

Quote:
Originally Posted by persian54 View Post
i dynoed my Z4 with the JB4 Beta

My car was used to help tune the DCT maps for the Z4

353 whp and 349 whq

base was 287whp and 282wtq

JB4 only
no other modifcations
91 octane gas

55 degrees

if you want one new, let me know, i can ask around. I know a lot of people
Getting the 35i soon, Looking to pump up the power after the first month. Where can I get a used/new one?
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 03:56 PM.




zpost
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST