E90Post
 


The Tire Rack
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Tracking, Autocrossing, Dragstrip, Driving Techniques > 3.08 to 3.46 Final Drive ratio



Reply
 
Thread Tools Search this Thread
      01-09-2018, 03:25 PM   #1
SF335
Private
8
Rep
50
Posts

Drives: BMW 335i M-Sport
Join Date: Dec 2017
Location: California Bay Area

iTrader: (0)

3.08 to 3.46 Final Drive ratio

I am planning to put an LSD into my 2011 335i 6MT and am debating whether to change the final drive ration from the 3.08 to a 3.46. It looks like doing the 3.46 is about $800 cheaper, which is quite nice. The car is my DD but will see a lot of track time.

I would love some input from those who have done this to get your impressions, how you use the car, and whether you would do it again/recommend it.

Thank you.
Appreciate 0
      01-09-2018, 04:52 PM   #2
feuer
Major General
feuer's Avatar
United_States
2554
Rep
6,428
Posts

Drives: wife crazy!
Join Date: Apr 2015
Location: Chicago, IL

iTrader: (3)

The reason why 3.08 cost more than 3.46 isn't the ratio. MT are welded and require more work to install LSD. Cut the main gear, mill it, drill it, tap it.....I have been tracking my 335i MT too and don't recommend changing the ratio because it will introduce the need for additional shifting and use of 5th gear. Now I use 3rd and 4th almost exclusively. Every additional shift will induce extra stress on the whole drive train. Also more work for me. So my vote is no.
Appreciate 1
Tim603296.50

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 06:17 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, 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