BMW 1-Series Forum (F20) 135i - 1Addicts.com > Second Generation 1 Series Forum > 2012 BMW 1-Series Sporthatch (F20) Discussion > 120i F20 B48 JB4 Map w/o DP any risk?
Post Reply
 
Thread Tools Search this Thread
      12-04-2017, 04:37 PM   #1
mieluise
Registered
0
Rep
3
Posts

Drives: 120i 2017
Join Date: Oct 2017
Location: Mexico

iTrader: (0)

120i F20 B48 JB4 Map w/o DP any risk?

Hi guys,

I'm new here and reading through some posts I see there's a lot of info on the previous engine but not too much on the new one, at least on what I'm interested in now: can I run JB4 Map 2 without downpipe safely?

I did run for a few days with Map 2 and compared with Map 1 and stock is like heaven and hell, it feels so much more powerful but I read before that in order to use (or at least take advantage of) Map 2 you must at least have an aftermarket downpipe installed which I do not have yet. I really like how my car feels on Map 2 but if there's any risk I won't do it until I get a DP.

So, is there any risk running on Map 2 without a downpipe?

Thanks guys, I hope you can help me and I can help you back in anything I can
Appreciate 0
      12-05-2017, 08:33 AM   #2
harkes
Colonel
harkes's Avatar
China
1072
Rep
2,353
Posts

Drives: M135i, E39 M5, NSX and AE86
Join Date: Apr 2014
Location: Xiamen, China

iTrader: (0)

Stay on map1 - would be a shame to damage the cat due to impatience
__________________
M135i 8AT PWG, MHD, Pure Stage2, WMI via Torqbyte CM5-LT, Custom tuned by PureBoost
(A Dane in China)
Appreciate 0
      12-06-2017, 10:58 AM   #3
mieluise
Registered
0
Rep
3
Posts

Drives: 120i 2017
Join Date: Oct 2017
Location: Mexico

iTrader: (0)

Quote:
Originally Posted by harkes View Post
Stay on map1 - would be a shame to damage the cat due to impatience
Thank you harkes, I will, although I may run Map 2 once in a while just to calm down my interior child :P just for a few moments, not pushing it too hard XD

Cat would be the only thing that may get damaged? What else can I modify on my beloved 120i B48?
Appreciate 0
      06-19-2019, 04:17 AM   #4
barry0907
SuperG
China
2
Rep
6
Posts

Drives: BMW F20 120i
Join Date: Jun 2019
Location: Shanghai,China

iTrader: (0)

Thanks mieluise for sharing the information on 120i jb4. I have a 120i as well and like to try JB4 or bms on it.

I don't think it's going to make any damage to your car because I don't see JB4 provides a list which what kind/which brand of intake or downpipe should be use for map2. or even the standard of air flow.

Why they suggested I think it's may because of various gas condition around the world and better intake and downpipe will definitely help the ecu to increase the psi easier
Appreciate 0
      08-23-2022, 09:55 PM   #5
MMexico
Registered
0
Rep
2
Posts

Drives: BMW F21 2017
Join Date: Aug 2022
Location: MEXICO

iTrader: (0)

No it isnīt recommendable
Appreciate 0
      10-22-2022, 11:01 PM   #6
luisejr20
New Member
luisejr20's Avatar
Costa Rica
0
Rep
18
Posts

Drives: 2002 e45 325ci; 2017 F20 120
Join Date: Oct 2022
Location: Costa Rica

iTrader: (0)

Always with stage 2 you need a catless DP, if not stay on 1, I have mine with BM3 stg2 3, but FBO.
Appreciate 0
Post Reply

Bookmarks

Tags
120i, b48, downpipe, jb4, map2

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 06:52 AM.




1addicts
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