E90Post
 


GTB Performance
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > MPG with Quaife??



Reply
 
Thread Tools Search this Thread
      11-03-2008, 09:53 PM   #1
cvc 22349a
Colonel
United_States
27

 
cvc 22349a's Avatar
 
Drives: 335i
Join Date: Sep 2007
Location: SF Bay


Posts: 2,255
iTrader: (8)

MPG with Quaife??

I'm planning on installing a Quaife LSD in my '07 335i 6AT.
I'm wondering if any of you with the Quaife have experienced reduced MPG (normal/highway driving) since installing this LSD??
Appreciate 0
      11-04-2008, 11:02 AM   #2
Fubarsky
Second Lieutenant
2

 
Fubarsky's Avatar
 
Drives: 335i Coupe
Join Date: Apr 2007
Location: Oregon


Posts: 210
iTrader: (0)

No difference. I got 30 mpg @ an average speed of 69 mph on a 314 mile trip with mine. Don't think it changes a thing.
__________________
Fubarsky
Appreciate 0
      11-04-2008, 11:21 AM   #3
techforge
Lieutenant
United_States
9

 
Drives: 335xi coupe
Join Date: Jul 2008
Location: Denver


Posts: 577
iTrader: (2)

Isn't it the same ratio as stock?
Appreciate 0
      11-04-2008, 11:42 AM   #4
sublimey
Private
1

 
Drives: Boxster S
Join Date: Feb 2008
Location: SG


Posts: 98
iTrader: (0)

Same as stock in mine.
Appreciate 0
      11-04-2008, 11:49 AM   #5
jadeddjay
Major
United_States
19

 
jadeddjay's Avatar
 
Drives: e92 335i
Join Date: Oct 2005
Location: jackson, ms


Posts: 1,426
iTrader: (4)

Garage List
2007 e92 335i  [0.00]
mine dropped to half. i guess its because both wheels are spinning
Appreciate 0
      11-04-2008, 12:22 PM   #6
AndreyATC
The Rocket
United_States
21

 
AndreyATC's Avatar
 
Drives: 2012 X6M
Join Date: Oct 2006
Location: Near NYC


Posts: 1,530
iTrader: (2)

Garage List
No changes
I dont see why it would change if you keep the same ratio
__________________
2012 X6M AW/Silverstone II Full Leather/Driver Assistance/HUD/Active ventilated seat/Rear Climate/Cold Weather/Premium Sound/BMW Apps/Soft Close/Side-top-rear Cams/Comfort Seats/3 Seats/Keyless
Appreciate 0
      11-04-2008, 04:06 PM   #7
WOPALX
Lieutenant Colonel
Australia
33

 
WOPALX's Avatar
 
Drives: 335i Sedan
Join Date: May 2007
Location: Sydney, Australia


Posts: 1,993
iTrader: (2)

Quote:
Originally Posted by jadeddjay View Post
mine dropped to half. i guess its because both wheels are spinning
+ 1 I saw a decrease in MPG, also turning off all the nanny's and drifting around corners kind of stuffs up your tires as well
Appreciate 0
      11-04-2008, 04:37 PM   #8
zsapphire7
Colonel
United_States
40

 
zsapphire7's Avatar
 
Drives: 08 e92 M3
Join Date: Oct 2007
Location: SF Bay Area


Posts: 2,302
iTrader: (21)

Are you planning to switch out the entire diff? or were u lucky and have a nonweilded diff?
Appreciate 0
      11-04-2008, 04:53 PM   #9
Sniz
Lieutenant General
184

 
Sniz's Avatar
 
Drives: e92 335 - gone // e36 M3 turbo
Join Date: Mar 2007
Location: Ellicott City, MD


Posts: 10,569
iTrader: (1)

I have a non welded diff....one of these days I'll pull the trigger on a LSD...god I need one.
__________________
Appreciate 0
      11-04-2008, 06:13 PM   #10
zsapphire7
Colonel
United_States
40

 
zsapphire7's Avatar
 
Drives: 08 e92 M3
Join Date: Oct 2007
Location: SF Bay Area


Posts: 2,302
iTrader: (21)

so lucky... if i had a bolted diff i wouldnt hesitate right now...
Appreciate 0
      11-05-2008, 11:19 AM   #11
micah
Second Lieutenant
United_States
3

 
micah's Avatar
 
Drives: 2006 330i 6MT
Join Date: Oct 2008
Location: Seattle, WA


Posts: 290
iTrader: (1)

At the risk of sounding like an idiot: with AWD there is greater drivetrain loss and lower MPG than RWD/FWD. It sort of strands to reason, doesn't it, that the LSD would have small effect on MPG? I think of an open diff as being 1WD and LSD as being 2WD -- is that an incorrect assessment?
Appreciate 0
      11-05-2008, 11:53 AM   #12
stressdoc
Moderator
Dominica
134

 
stressdoc's Avatar
 
Drives: F80 YMB
Join Date: Jun 2005
Location: MO


Posts: 10,159
iTrader: (0)

There is a very small increment in additional friction, both from moving the internal gears and the slight increase in lubricant temperature. There is no appreciable change otherwise, no 1wd to 2wd effect, as an open dif is driving both wheels under most conditions.

I am more concerned with noise, although most quaife owners report things are pretty quiet. I still need to get mine installed, and get some audio via stethoscope.
Appreciate 0
      11-05-2008, 12:04 PM   #13
cvc 22349a
Colonel
United_States
27

 
cvc 22349a's Avatar
 
Drives: 335i
Join Date: Sep 2007
Location: SF Bay


Posts: 2,255
iTrader: (8)

Quote:
Originally Posted by jadeddjay View Post
mine dropped to half. i guess its because both wheels are spinning
Are you kidding??
Appreciate 0
      11-05-2008, 12:13 PM   #14
Julian
New Member
0

 
Drives: e36 328i
Join Date: Sep 2007
Location: Bridgewater, NJ


Posts: 15
iTrader: (0)

Quote:
Originally Posted by cvc 22349a View Post
Are you kidding??
I don't think so, my dad suffers from the same sickness. The only time a open diff car becomes "1wd" is when one of the tires breaks traction, and the stupid open diff sends 100% power to the one with least traction.
Appreciate 0
      11-05-2008, 03:29 PM   #15
WOPALX
Lieutenant Colonel
Australia
33

 
WOPALX's Avatar
 
Drives: 335i Sedan
Join Date: May 2007
Location: Sydney, Australia


Posts: 1,993
iTrader: (2)

Quote:
Originally Posted by stressdoc View Post

I am more concerned with noise, although most quaife owners report things are pretty quiet. I still need to get mine installed, and get some audio via stethoscope.
FYI I have had no noticeable noise increase in the cabin.
Appreciate 0
      11-05-2008, 04:22 PM   #16
cvc 22349a
Colonel
United_States
27

 
cvc 22349a's Avatar
 
Drives: 335i
Join Date: Sep 2007
Location: SF Bay


Posts: 2,255
iTrader: (8)

Quote:
Originally Posted by AndreyATC View Post
No changes
I dont see why it would change if you keep the same ratio
I'm not an Engineer or Mechanic, but I thought additional friction or drivetrain loss, so to speak, might increase fuel comsumption. That's why I was curious if people have noticed an increase in fuel consumption.
Appreciate 0
      11-05-2008, 05:13 PM   #17
AndreyATC
The Rocket
United_States
21

 
AndreyATC's Avatar
 
Drives: 2012 X6M
Join Date: Oct 2006
Location: Near NYC


Posts: 1,530
iTrader: (2)

Garage List
Quote:
Originally Posted by cvc 22349a View Post
I'm not an Engineer or Mechanic, but I thought additional friction or drivetrain loss, so to speak, might increase fuel comsumption. That's why I was curious if people have noticed an increase in fuel consumption.
True, but i dont think there is any friction increase
At least it's very minimal
__________________
2012 X6M AW/Silverstone II Full Leather/Driver Assistance/HUD/Active ventilated seat/Rear Climate/Cold Weather/Premium Sound/BMW Apps/Soft Close/Side-top-rear Cams/Comfort Seats/3 Seats/Keyless
Appreciate 0
      11-22-2008, 03:03 PM   #18
cvc 22349a
Colonel
United_States
27

 
cvc 22349a's Avatar
 
Drives: 335i
Join Date: Sep 2007
Location: SF Bay


Posts: 2,255
iTrader: (8)

Quote:
Originally Posted by stressdoc View Post
There is a very small increment in additional friction, both from moving the internal gears and the slight increase in lubricant temperature. There is no appreciable change otherwise, no 1wd to 2wd effect, as an open dif is driving both wheels under most conditions.

I am more concerned with noise, although most quaife owners report things are pretty quiet. I still need to get mine installed, and get some audio via stethoscope.
Well, I got my Quaife installed last week; what a blast exiting sharp turns! Hope it helps driving in snow/slippery surfaces.
About your/my noise concern: I've only heard gear whine once, and that was when I drove back to Tahoe from the Bay Area on a warm day. After having driven approx. 75-100 miles, I noticed a gear whine sound coming from the car upon acceleration. When I let go of the gas, the sound when away; when I accelerated I got the gear whine (not a major acceleration btw). I haven't heard the gear whine since during my short trips up to 20 miles. It's also pretty cold up here now. I can only assume the gear whine I heard was related to heat.
Anyone else experience this with their Quafe LSD?
Appreciate 0
      11-22-2008, 03:20 PM   #19
bmwmike
Lieutenant
Canada
13

 
Drives: 2007 335i Coupe
Join Date: Jul 2006
Location: Vancouver, BC, Canada


Posts: 508
iTrader: (1)

Quote:
Originally Posted by cvc 22349a View Post
Well, I got my Quaife installed last week; what a blast exiting sharp turns! Hope it helps driving in snow/slippery surfaces.
About your/my noise concern: I've only heard gear whine once, and that was when I drove back to Tahoe from the Bay Area on a warm day. After having driven approx. 75-100 miles, I noticed a gear whine sound coming from the car upon acceleration. When I let go of the gas, the sound when away; when I accelerated I got the gear whine (not a major acceleration btw). I haven't heard the gear whine since during my short trips up to 20 miles. It's also pretty cold up here now. I can only assume the gear whine I heard was related to heat.
Anyone else experience this with their Quafe LSD?
Any noises i heard initially went away after a while. You will see the best gains on slippery surfaces. Just make sure you change the oil in the diff after a few months after it's broken in and use the proper oil (I use BMW 335i diff oil).
__________________
Shiv tuned since Nov 2006, Quaife Feb 2007, Helix FMIC, Agency Power downpipes, M3 suspension parts, KW V3 w/Swift springs, Dinan intake, HID fogs and 235/265 tires
Appreciate 0
      11-22-2008, 04:56 PM   #20
cvc 22349a
Colonel
United_States
27

 
cvc 22349a's Avatar
 
Drives: 335i
Join Date: Sep 2007
Location: SF Bay


Posts: 2,255
iTrader: (8)

Will do on the fluid change; also recommended by Harold at HP, only Redline 75/90
Appreciate 0
      11-22-2008, 07:31 PM   #21
Fubarsky
Second Lieutenant
2

 
Fubarsky's Avatar
 
Drives: 335i Coupe
Join Date: Apr 2007
Location: Oregon


Posts: 210
iTrader: (0)

Quote:
Originally Posted by stressdoc View Post
There is a very small increment in additional friction, both from moving the internal gears and the slight increase in lubricant temperature. There is no appreciable change otherwise, no 1wd to 2wd effect, as an open dif is driving both wheels under most conditions.

I am more concerned with noise, although most quaife owners report things are pretty quiet. I still need to get mine installed, and get some audio via stethoscope.
I was one of the guys concerned with what I perceived as a very, very light harmonic growl when I was accelerating with my new Quaife. It has diminished greatly, I don't really think it's there anymore. The geometry of the car may have had something to do with it, as I lowered my car on KW2's at the same time and slammed it pretty hard. Since then I raised the car
3/4" and the Quaife seems to have broken in. I have to say LSD and a piggyback are the shits for upgrades on our cars, both give you a whole new ride, with KW's in 3rd. You will enjoy yours I'm sure.
__________________
Fubarsky
Appreciate 0
      11-23-2008, 12:20 PM   #22
midlife
ocasionally in crisis
28

 
midlife's Avatar
 
Drives: '08 335i cabrio
Join Date: Jun 2007
Location: ..........


Posts: 2,359
iTrader: (0)

Quote:
Originally Posted by bmwmike View Post
Any noises i heard initially went away after a while. You will see the best gains on slippery surfaces. Just make sure you change the oil in the diff after a few months after it's broken in and use the proper oil (I use BMW 335i diff oil).

subscribed
__________________
If your car isn't scary - it's just not fast enough !
RPI IC / UR catless DPs / JB3 2.0 beta / UR CAI / Quaife LSD / Snow Methanol Injection / VK oil cooler upgrade / Forge DVs /
M3 rear sway / Riss catch can / Paddle shifting 6AT / M Sport steering wheel / Logic 7 / Dunlop Direzza Z1 255/235 /
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 01:02 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