E90Post
 


European Auto Source
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > LSD Question



Reply
 
Thread Tools Search this Thread
      01-22-2013, 10:11 AM   #1
09BMW335i
Second Lieutenant
09BMW335i's Avatar
2
Rep
246
Posts

 
Drives: 2009 335i
Join Date: Nov 2012
Location: northwest burbs, IL

iTrader: (0)

Garage List
2012 Cadillac SRX  [0.00]
2009 335I  [0.00]
LSD Question

I am about to order a LSD from Turner MS for aeound 1800 ish and have a few questions for the board.



I have 2 options 3.08 or the 3.46 Is it worth the $500 More to go to the 3.46 gear. Do you really improve you times and is the acceleration that much more noticable?

With the 3.46 gear what are you at RPM wise at crusing speed say 80-85 MPH in 6 Gear?

how much is your topspeed with 3.46 really taken away?

Polishing of the ring gears to remove high spots is it worth it?

what are some other brands that other would recomeend instead of Turner and why?


Thanks
__________________
09 335i Sport --JB4--DCI--Macht Schnell Catless Downpipes--AMS FMIC--Walbro 455 LPFP--HPF Gen2 Exhaust--SPEC Stage 3+ clutch / billet steel flywheel--Flash by Wedge
Appreciate 0
      01-22-2013, 11:28 AM   #2
N111CUK
G force Junkie
N111CUK's Avatar
United Kingdom
1
Rep
129
Posts

 
Drives: 335i M Sport black edition
Join Date: Jun 2012
Location: United kingdom

iTrader: (0)

Garage List
Send a message via Skype™ to N111CUK
I'm currently installing a complete M3 rear subframe which has loads of benefits

Ratios depends and your existing tranny is it MT or AT

Suspension and chassis is also vital hence the advantage of the M3 rear end

Search and you'll find some great info about this
Appreciate 0
      01-22-2013, 11:30 AM   #3
tmo335tt
Second Lieutenant
tmo335tt's Avatar
4
Rep
234
Posts

 
Drives: E90 2008 335i
Join Date: Apr 2011
Location: here

iTrader: (0)

At 80-85mph you will be close to 3500rpm...it reminds me of driving a e36 m3 always wishing that it had a 6th gear. I went back to my 3.08.
It's very close to a 1000rpm difference all throughout the rpm range.
Appreciate 0
      01-22-2013, 11:33 AM   #4
09BMW335i
Second Lieutenant
09BMW335i's Avatar
2
Rep
246
Posts

 
Drives: 2009 335i
Join Date: Nov 2012
Location: northwest burbs, IL

iTrader: (0)

Garage List
2012 Cadillac SRX  [0.00]
2009 335I  [0.00]
i have a 6MT
i also planned at the same time changing out bushing swaybars ect.
__________________
09 335i Sport --JB4--DCI--Macht Schnell Catless Downpipes--AMS FMIC--Walbro 455 LPFP--HPF Gen2 Exhaust--SPEC Stage 3+ clutch / billet steel flywheel--Flash by Wedge
Appreciate 0
      01-22-2013, 12:46 PM   #5
Exzackt
Second Lieutenant
Exzackt's Avatar
United_States
3
Rep
256
Posts

 
Drives: n54 e92 335i/e39 540i6
Join Date: Feb 2012
Location: SF Bay

iTrader: (2)

1800 is a lot to for a LSD, unless prices have gone up in the last 6 months look for a better deal. I went through my local dealer SonicMS..
__________________
2007 BSM 335i ZSP/ZPP l JB4 G5 ISO l E85 l BMS FLASH l METH l DCI l DPs l Twin BOVs l
Scoops l 18" Forgestar F14sl Koni Yellows l Swift Spec-R l GForce Rivals/Slicks l Quaife LSD
Appreciate 0
      01-22-2013, 12:58 PM   #6
N111CUK
G force Junkie
N111CUK's Avatar
United Kingdom
1
Rep
129
Posts

 
Drives: 335i M Sport black edition
Join Date: Jun 2012
Location: United kingdom

iTrader: (0)

Garage List
Send a message via Skype™ to N111CUK
I would look into the M3 rear subframe swap

Why?

Well by buying a good M3 subframe from a salvage yard you will automatically be upgrading the following in one hit

1, M3 LSD which is clutch type and IMHO better
2, All the M3 rear suspension components and their bushings
3, M3 Sway bar and bushing
4, M3 subframe bushing
6, Uprated rear brakes (you will need to upgrade your front brakes to balance the bias)
7, stronger axles to cope with power over 500hp
8, stronger prop shaft to cope with more power torque etc...

Shopping list

1 Complete M3 rear subframe with everything still bolted on
2 Complete M3 prop shaft both halves
3 If you are keeping your 335i hubs and disks then you need adjustable camber arms

I will be doing this transplant next week and the current steps to archive this will be as follows

Drop 335i subframe
Install M3 subframe
Customise the M3 prop with the trans side of the 335i prop measure cut weild and balance with a prop shaft company

My spend so far which is £

Subframe and prop £400 from a 2010 M3 DCT
Cut wield and balance prop £135
Labour 1 day £500

Total £1035 about $1650

Now that's a bargain

If you have a manual then you will need to find an M3 DCT diff which is 3.15 final drive which means gearing a slightly shorter but not by much.

Hope this gives you some more thoughts
Appreciate 0
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 03:52 PM.




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