E90Post
 


Bimmer Retrofit
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Do Cobb or JB-4 tunes kill gas mileage?



Reply
 
Thread Tools Search this Thread
      03-25-2013, 09:43 PM   #1
stevefoster
Private
 
Drives: '11 335i coupe SG/Blk
Join Date: Aug 2010
Location: Central NJ

Posts: 84
iTrader: (0)

Do Cobb or JB-4 tunes kill gas mileage?

I know if you want to play, you have to pay. Just want to see what I'm getting myself in to. Thanks for any replies.

Steve Foster
'11 335i cp/mt
soon to tune
stevefoster is offline  
0
Reply With Quote
      03-25-2013, 09:56 PM   #2
ForgedDistributing
Lieutenant
 
ForgedDistributing's Avatar
 
Drives: FBO N55 >:)
Join Date: Apr 2009
Location: Florida/Michigan

Posts: 561
iTrader: (3)

Of course!
Even if the tune itself doesn't kill the MPG with the higher boost levels, the driver will make it worse!
__________________

PH: (616) 914-6677 FAX: (305) 255-5446
Contact me for exclusive forum and wholesale pricing!
Email: Sean@Forgeddistributing.com
Site: http://www.forgeddistributing.com/
ForgedDistributing is offline   United_States
0
Reply With Quote
      03-25-2013, 10:25 PM   #3
RIDERDIE
Second Lieutenant
 
RIDERDIE's Avatar
 
Drives: 07 335i SGM COUPE
Join Date: Oct 2012
Location: VIRGINIA BEACH

Posts: 241
iTrader: (1)

For me it's been minimal. Jb4, catless dp's, dci, and an axle back and I still average 21 or 22. The first few moths I owned the car it was 23mpg. Albeit mostly highway driving and I don't abuse the power just enjoy it every now and then.
RIDERDIE is offline   United_States
0
Reply With Quote
      03-25-2013, 11:30 PM   #4
avol3xo
Lieutenant
 
avol3xo's Avatar
 
Drives: 2011 E92 335i
Join Date: Jul 2012
Location: Montgomery, AL

Posts: 519
iTrader: (0)

Garage List
2011 BMW 335i  [0.00]
Under normal driving no, I'm still about the same, maybe half a mpg down. When you are on it you aren't gonna get great gas mileage anyway but I dont have time to look down at how much, having too much fun driving!!
__________________
2011 BMW 335i E92 Vermillion Red, 6MT
avol3xo is offline  
0
Reply With Quote
      03-25-2013, 11:52 PM   #5
335iRlz
Major
 
Drives: 335i RiP,M3,f10m5 gone, m4
Join Date: Feb 2013
Location: MD

Posts: 1,267
iTrader: (3)

Quote:
Originally Posted by RIDERDIE View Post
For me it's been minimal. Jb4, catless dp's, dci, and an axle back and I still average 21 or 22. The first few moths I owned the car it was 23mpg. Albeit mostly highway driving and I don't abuse the power just enjoy it every now and then.
Same lol (cobb)
335iRlz is offline  
0
Reply With Quote
      03-26-2013, 05:02 PM   #6
drallafi
Enlisted Member
 
Drives: 335i
Join Date: Dec 2012
Location: AZ

Posts: 32
iTrader: (0)

Quote:
Originally Posted by avol3xo View Post
Under normal driving no, I'm still about the same, maybe half a mpg down. When you are on it you aren't gonna get great gas mileage anyway but I dont have time to look down at how much, having too much fun driving!!
This.

Drove to Vegas from AZ last week, got around 26 mpg. Cobb S1 aggressive.
drallafi is offline  
0
Reply With Quote
      03-26-2013, 05:16 PM   #7
PR3CI5N
need4speed
 
PR3CI5N's Avatar
 
Drives: 2010 E90 M 335i
Join Date: Jun 2010
Location: West Coast

Posts: 1,188
iTrader: (15)

All depends on how much of a lead foot you have. Just installing it won't affect your gas mileage.
__________________
N54
PR3CI5N is offline   United_States
0
Reply With Quote
      03-26-2013, 06:19 PM   #8
badblkX6
Captain
 
Drives: 2014 X6 35i
Join Date: Sep 2011
Location: South Jersey

Posts: 726
iTrader: (9)

Garage List
2014 BMW X6  [0.00]
As everyone said it will probably go down a little, but well worth it. Depends on how you drive and how heavy your foot gets.

I get on mine quite a bit and rarely go under 21 mpg.
badblkX6 is offline   United_States
0
Reply With Quote
      03-26-2013, 07:08 PM   #9
melloww22
Lieutenant
 
melloww22's Avatar
 
Drives: 2011 335i E90
Join Date: Apr 2011
Location: San Diego

Posts: 583
iTrader: (1)

Quote:
Originally Posted by stevefoster
I know if you want to play, you have to pay. Just want to see what I'm getting myself in to. Thanks for any replies.

Steve Foster
'11 335i cp/mt
soon to tune
not as much as your right foot... I get avg of 19mpg
melloww22 is offline  
0
Reply With Quote
      03-26-2013, 10:23 PM   #10
wdlfbio
Captain
 
Drives: Z4 35is, 335xi, Chevy 2500Dmax
Join Date: Dec 2006
Location: Maple Valley, WA

Posts: 758
iTrader: (1)

JB4 stage2, map1. I lost 1mpg. At 23.4 now. Mostly hwy miles-124 round trip
__________________
'08 Alpine white E92 M3 with DTC--Sold
'12 Alpine white E92 335 Xdrive with slush box
'07 Summit white Chevy 2500 HD Duramax/Allison
'12 Alpine white Z4 35is via EuroDelivery June 4th
wdlfbio is offline  
0
Reply With Quote
      03-26-2013, 10:26 PM   #11
335iRlz
Major
 
Drives: 335i RiP,M3,f10m5 gone, m4
Join Date: Feb 2013
Location: MD

Posts: 1,267
iTrader: (3)

FBO mods that aren't tightened correctly kill cars
335iRlz is offline  
0
Reply With Quote
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
Forum Jump


All times are GMT -5. The time now is 06:02 AM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
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