LSDs with Shorter Gears - BMW 3-Series (E90 E92) Forum

spyder210 · 06-08-2009, 11:47 PM

Hi All,

I recently purchased a pre-owned 335i coupe 6MT and have been doing some research on LSDs. I noticed that Dinan is selling Quaife LSDs with stock 3.08 gears. Can you recommend any LSDs that come with more aggressive gearing (3.46, 3.90, etc.)? Any idea if Dinan will be offering one?

Thanks,
Paul

zsapphire7 · 06-09-2009, 01:45 AM

they should be able to do it... I wouldnt recommend anything over 3.46 however. I kinda miss the 3.08 after i switched to 3.46 because of the loss in gas milage.

spyder210 · 06-09-2009, 08:31 AM

Thank you. I will call and ask them. How much of a performance increase did you experience going to shorter gears? Btw nice color...mine's the same.

jay spec · 06-09-2009, 10:51 AM

not sure if dinan will offer it, but you definitely have that option with the quaife. you can contact harold at hpautowerks for more information.

dlbrooks18 · 06-09-2009, 10:56 AM

Quote:

Originally Posted by jay spec

not sure if dinan will offer it, but you definitely have that option with the quaife. you can contact harold at hpautowerks for more information.

+1

Mr. 5 · 06-09-2009, 11:18 AM

Quote:

Originally Posted by zsapphire7

they should be able to do it... I wouldnt recommend anything over 3.46 however. I kinda miss the 3.08 after i switched to 3.46 because of the loss in gas milage.

I agree. I had the chance to drive one the other day and it was great fun, but after I ran it side by side, my 3.08 gears held up pretty well. I actually pulled a bit and the 3.46 car had more mods.
I would agree that the shorter gears will help with a high reving NA car, but with a car with this much torque at the lower RPMs, I think that the 3.08s are much better.

stylinexpat · 06-09-2009, 11:21 AM

PM me for more information on LSD's..

scheherazade · 06-09-2009, 11:31 AM

You need a ring and pinion to change your final drive ration, not an LSD.

-scheherazade

zsapphire7 · 06-09-2009, 12:52 PM

Quote:

Originally Posted by spyder210

Thank you. I will call and ask them. How much of a performance increase did you experience going to shorter gears? Btw nice color...mine's the same.

Its almost equivalent to shifting all the gears down one.

6th = 5th, 4=3rd, 3rd =2nd.

3.46/3.08 =~1.12 or 12% increase in tq/gear.

spyder210 · 06-09-2009, 04:38 PM

Thanks for your help guys! I will be asking Dinan and then HP Autowerks if I need to. I really want an LSD and shorter gears...two birds with one stone!

Thanks again,
Paul

Dangerlucas · 06-09-2009, 05:49 PM

Like others have said talk to Harold at HP Autowerks. I had my LSD with a 3.46 final drive installed there a few weeks ago and I'm very happy with the result. Here's the write up I did: http://www.1addicts.com/forums/showthread.php?t=269389

Rysandro · 06-09-2009, 06:19 PM

Quote:

Originally Posted by Mr. 5

I agree. I had the chance to drive one the other day and it was great fun, but after I ran it side by side, my 3.08 gears held up pretty well. I actually pulled a bit and the 3.46 car had more mods.
I would agree that the taller gears will help with a high reving NA car, but with a car with this much torque at the lower RPMs, I think that the 3.08s are much better.

It's shorter gears that would help a high reving NA Car more, and taller gears are fine for Turbo Cars with so much torque.

I think that's exactly what you meant to say. It's just that 3.46 gears are actually shorter than 3.08 gears. The higher the number the shorter the gears.

Mr. 5 · 06-09-2009, 06:30 PM

Quote:

Originally Posted by 09AlpineTTSedan

It's shorter gears that would help a high reving NA Car more, and taller gears are fine for Turbo Cars with so much torque.

I think that's exactly what you meant to say. It's just that 3.46 gears are actually shorter than 3.08 gears. The higher the number the shorter the gears.

You're right, I had it backwards.
My e46 M3 had 4.10s and that was completely a different story since it had no torque and was all high end.
I'll edit.

Panoz · 06-11-2009, 09:46 AM

Quote:

Originally Posted by Mr. 5

I would agree that the shorter gears will help with a high reving NA car, but with a car with this much torque at the lower RPMs, I think that the 3.08s are much better.

Its been quite some time I made this statement and everyone was bitching on me. I'm happy to see I was not wrong. We've tried switching a Hartge LSD from a steptronic to a 6MT car 1,5 year ago and we made our conclusions then.

WCM3 · 06-11-2009, 10:32 AM

You could probably get any gearing you want from www.diffsonline.com.

Mr. 5 · 06-11-2009, 11:50 AM

Quote:

Originally Posted by WCM3

You could probably get any gearing you want from www.diffsonline.com.

I don't think so.
Right now Diffsonline only offers 3.08 and 3.46
http://www.diffsonline.com/product/customdiff9.shtml

I would actually like to try a taller gear, like a 2.93 or something of the sort.
With the amount of torque we have, I think it would be awesome!

WCM3 · 06-11-2009, 11:58 AM

Quote:

Originally Posted by Mr. 5

I don't think so.
Right now Diffsonline only offers 3.08 and 3.46
http://www.diffsonline.com/product/customdiff9.shtml

I would actually like to try a taller gear, like a 2.93 or something of the sort.
With the amount of torque we have, I think it would be awesome!

Yeah, it's not listed on the website. But if you were really interested you could always try emailing Dan and asking if it's possible. I think a 2.93 would be nice for us turbo guys.

Sniz · 06-11-2009, 12:21 PM

Quote:

Originally Posted by Mr. 5

I don't think so.
Right now Diffsonline only offers 3.08 and 3.46
http://www.diffsonline.com/product/customdiff9.shtml

I would actually like to try a taller gear, like a 2.93 or something of the sort.
With the amount of torque we have, I think it would be awesome!

+1

dont see why people want a shorter rear end for the 335.

spyder210 · 06-11-2009, 09:44 PM

Why do you want taller gears?
Do you guys really top it out often?

I rarely go over 80 mph (b/c I can't affored another ticket).

I just figured getting shorter gears would add a tad more low end grunt around town etc.

HighVoltage · 06-12-2009, 02:32 PM

Quote:

Originally Posted by spyder210

Why do you want taller gears?
Do you guys really top it out often?

I rarely go over 80 mph (b/c I can't affored another ticket).

I just figured getting shorter gears would add a tad more low end grunt around town etc.

Because most people are already having issues getting the suspension+rubber to fully hook the existing torque onto the street pavement. Multiplying more torque into the equation (i.e shorter gears) is not going to help but it might make for a hell of a smoke show.

JoeyFiasco · 06-12-2009, 02:56 PM

Quote:

Originally Posted by HighVoltage

Because most people are already having issues getting the suspension+rubber to fully hook the existing torque onto the street pavement. Multiplying more torque into the equation (i.e shorter gears) is not going to help but it might make for a hell of a smoke show.

that's a good point i'll keep that in mind when i venture into lsd land

dlbrooks18 · 06-12-2009, 03:07 PM

I'm really happy with my Quaife lsd that I got from HP Autowerks w/ 3.46 gearing. I just put 275's on my 19x10 +22 offset, and had an alignment job done with some major fender rolling work that turned out perfect! Car hooks up great now, and I can't believe how much better the tires w LSD w better alignment improved on the performance.

06-08-2009, 11:47 PM	#1
spyder210 New Member Drives: 2007 E92 335i Join Date: Jun 2009 Location: Syosset, New York Posts: 16 iTrader: (0)	LSDs with Shorter Gears Hi All, I recently purchased a pre-owned 335i coupe 6MT and have been doing some research on LSDs. I noticed that Dinan is selling Quaife LSDs with stock 3.08 gears. Can you recommend any LSDs that come with more aggressive gearing (3.46, 3.90, etc.)? Any idea if Dinan will be offering one? Thanks, Paul
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06-09-2009, 10:51 AM	#4
jay spec _________________ Drives: a 7-seater Join Date: Dec 2007 Location: SF Bay Area, CA Posts: 3,585 iTrader: (0)	not sure if dinan will offer it, but you definitely have that option with the quaife. you can contact harold at hpautowerks for more information. __________________

06-09-2009, 05:49 PM	#11
Dangerlucas Captain Drives: BMW 135i Join Date: Jul 2008 Location: Bay Area, CA Posts: 622 iTrader: (2) Garage List 2008 135i [2.75]	Like others have said talk to Harold at HP Autowerks. I had my LSD with a 3.46 final drive installed there a few weeks ago and I'm very happy with the result. Here's the write up I did: http://www.1addicts.com/forums/showthread.php?t=269389 __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(1addicts.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.

06-11-2009, 10:32 AM	#15
WCM3 Î canŧ főcus mŷ attėntĭon Drives: Turbo, I6, & Jeep Join Date: May 2008 Location: West Chester, Pa Posts: 1,103 iTrader: (6)	You could probably get any gearing you want from www.diffsonline.com. __________________ 1995 M3 Coupe - Avus/Modena, AEM EMS, Precision Turbo, Boostlogic, H&R, Fikse FM/5, MaxVelocity, Maximum PSI, 20% Tint, etc etc.. 2009 M3 Coupe - AW/Fox Red, 6MT, Carbon Roof, Shadow Trim, etc (Sold) 2007 335i Coupe - JB3, 6MT, UR Intake, H&R Springs, Gunmetal VMR V710, Aero Lip, Carbon Trim, etc (Sold)

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06-09-2009, 01:45 AM	#2
zsapphire7 Colonel Drives: 08 e92 M3 Join Date: Oct 2007 Location: TX Posts: 2,251 iTrader: (21)	they should be able to do it... I wouldnt recommend anything over 3.46 however. I kinda miss the 3.08 after i switched to 3.46 because of the loss in gas milage.

06-09-2009, 08:31 AM	#3
spyder210 New Member Drives: 2007 E92 335i Join Date: Jun 2009 Location: Syosset, New York Posts: 16 iTrader: (0)	Thank you. I will call and ask them. How much of a performance increase did you experience going to shorter gears? Btw nice color...mine's the same.

06-09-2009, 11:21 AM	#7
stylinexpat Captain Drives: Join Date: Aug 2008 Posts: 762 iTrader: (0)	PM me for more information on LSD's..

06-09-2009, 11:31 AM	#8
scheherazade Major Drives: 09 GTR (& 93' accord!) Join Date: Sep 2008 Location: DC metro area Posts: 1,465 iTrader: (8)	You need a ring and pinion to change your final drive ration, not an LSD. -scheherazade

06-09-2009, 04:38 PM	#10
spyder210 New Member Drives: 2007 E92 335i Join Date: Jun 2009 Location: Syosset, New York Posts: 16 iTrader: (0)	Thanks for your help guys! I will be asking Dinan and then HP Autowerks if I need to. I really want an LSD and shorter gears...two birds with one stone! Thanks again, Paul

06-11-2009, 09:44 PM	#19
spyder210 New Member Drives: 2007 E92 335i Join Date: Jun 2009 Location: Syosset, New York Posts: 16 iTrader: (0)	Why do you want taller gears? Do you guys really top it out often? I rarely go over 80 mph (b/c I can't affored another ticket). I just figured getting shorter gears would add a tad more low end grunt around town etc.

06-12-2009, 03:07 PM	#22
dlbrooks18 Brigadier General Drives: e90 335i Join Date: Nov 2008 Location: Los Angeles Posts: 3,198 iTrader: (2)	I'm really happy with my Quaife lsd that I got from HP Autowerks w/ 3.46 gearing. I just put 275's on my 19x10 +22 offset, and had an alignment job done with some major fender rolling work that turned out perfect! Car hooks up great now, and I can't believe how much better the tires w LSD w better alignment improved on the performance.