BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      02-10-2014, 11:59 AM   #89
HP Autosport
General
United_States
2274
Rep
39,916
Posts

Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com

iTrader: (34)

Quote:
Originally Posted by dcaron9999 View Post
Reviving an old thread ...
Any news on the E8x/E9X finned diff cover project?
Are there any options out there besides the $800 one from VAC Motorsports?
Thanks.
We did start one, but it did not fair the market well so we scrap it.
Appreciate 0
      02-10-2014, 12:40 PM   #90
dcaron9999
Major
dcaron9999's Avatar
Canada
139
Rep
1,409
Posts

Drives: 2011 135i M package
Join Date: Jan 2010
Location: Mirabel, Quebec

iTrader: (0)

Quote:
Originally Posted by HP Autosport View Post
We did start one, but it did not fair the market well so we scrap it.
Thanks Harold.

When would a finned diff cover actually be justified?

Did you ever see cases of burnt LSD units due to overheating at the track? I heard of such an experience on two occasions from a local forum member, but dont have the specifics. Maybe this could happen if you are going to be lapping for an extended period of time, without cool downs ,etc.

Is there a simple visual check one can make such as diff fluid boiling and oozing out out from the top vent hole on the diff?

One serious advantage with the specific cover from VAC is its larger capacity to hold diff fluid. Beyond the cooling from the air exposed fins, the larger qty of fluid in itself must help with lowering the temperature and keeping the metal shavings in lower concentration between fluid change intervals. Just speculating ...
__________________
2011 X3 35i with M pack + 2011 135i w/6SPMT | 255 square tire setup | Quaife 3.46 LSD | Diff lock down bracket | Bilstein B8+Swift SpecR springs+H&R FSB | CDV delete | BMS Oil Tstat bypass | ER FMIC & CP | N54Tuning DP | GC Street Camber Plates | M3 FCA +guide rods+RSFB's+Tranny mounts | Manzo toe arms | Cobb Stg2 agressive tune | Hawk DTC70 brake pads | RB SS brake pistons | Goodridge SS brake lines | Custom brake cooling ducts

Last edited by dcaron9999; 02-10-2014 at 12:48 PM..
Appreciate 0
      02-10-2014, 12:49 PM   #91
Splinterz88
Lieutenant
Splinterz88's Avatar
United_States
47
Rep
589
Posts

Drives: BMW 1M
Join Date: Aug 2007
Location: Philadelphia, PA

iTrader: (6)

Garage List
2011 BMW 1M  [4.40]
My buddy did a review of the VAC diff cover on his 335i. http://www.e90post.com/forums/showthread.php?t=720740
__________________
#446 of 740

Last edited by Splinterz88; 02-10-2014 at 02:13 PM..
Appreciate 0
      02-10-2014, 01:59 PM   #92
dcaron9999
Major
dcaron9999's Avatar
Canada
139
Rep
1,409
Posts

Drives: 2011 135i M package
Join Date: Jan 2010
Location: Mirabel, Quebec

iTrader: (0)

Quote:
Originally Posted by Splinterz88 View Post
...My buddy did a review of the VAC diff cover on his 335i...
Thanks for link.

So he did boil over his fluid, to the point of it spewing from the vent hole. Could have been old expired fluid. Perhaps 75W140 fluid could have resisted better versus stock 75W90 fluid. Maybe not.

$800 for a silly cover though! When replacing the diff, it's one of those, "while you are in there, might as well fix it" mods ...
__________________
2011 X3 35i with M pack + 2011 135i w/6SPMT | 255 square tire setup | Quaife 3.46 LSD | Diff lock down bracket | Bilstein B8+Swift SpecR springs+H&R FSB | CDV delete | BMS Oil Tstat bypass | ER FMIC & CP | N54Tuning DP | GC Street Camber Plates | M3 FCA +guide rods+RSFB's+Tranny mounts | Manzo toe arms | Cobb Stg2 agressive tune | Hawk DTC70 brake pads | RB SS brake pistons | Goodridge SS brake lines | Custom brake cooling ducts

Last edited by dcaron9999; 02-10-2014 at 03:45 PM..
Appreciate 0
      02-10-2014, 04:00 PM   #93
HP Autosport
General
United_States
2274
Rep
39,916
Posts

Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com

iTrader: (34)

Quote:
Originally Posted by dcaron9999 View Post
Thanks Harold.

When would a finned diff cover actually be justified?

Did you ever see cases of burnt LSD units due to overheating at the track? I heard of such an experience on two occasions from a local forum member, but dont have the specifics. Maybe this could happen if you are going to be lapping for an extended period of time, without cool downs ,etc.

Is there a simple visual check one can make such as diff fluid boiling and oozing out out from the top vent hole on the diff?

One serious advantage with the specific cover from VAC is its larger capacity to hold diff fluid. Beyond the cooling from the air exposed fins, the larger qty of fluid in itself must help with lowering the temperature and keeping the metal shavings in lower concentration between fluid change intervals. Just speculating ...
You will not have a problem with a Quaife or Wavetrac as they product much less heat than a clutch type LSD. We have tracked and competed our 335i without a finned cover of any kind without any issues. Our 135i was tracked with and without the finned cover, again, without any issues.

In the years of running both Quaife and Wavetrac we have not seen metals in the gear oil. If you do, there is a problem. You may be accustomed to the clutch type LSD, which will deposit lots of metal in the oil between changes from wear and tear.
Appreciate 1
Post 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 02:00 PM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
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