Race Car Tech Discuss anything related to road racing and auto X.

shimming clutch lsd

Old 02-01-03, 09:20 PM
  #1  
male stripper
10 Year Member
Thread Starter
iTrader: (1)
 
jeremy's Avatar
 
Join Date: Oct 2001
Location: St Petersburg, FL
Posts: 3,131
Likes: 0
Received 1 Like on 1 Post
shimming clutch lsd

my friend james said something about some people "shimming" their lsd clutch packs instead of rebuilding them. what are the pros/cons and how is this done?
jeremy is offline  
Old 02-02-03, 01:23 AM
  #2  
www.lms-efi.com
iTrader: (27)
 
C. Ludwig's Avatar
 
Join Date: Mar 2001
Location: Floyds Knobs. IN
Posts: 5,106
Received 30 Likes on 23 Posts
Your friend James is a dumbass! Don't listen to him. He probably owns 3 1gs that don't run! He probably thinks the noise coming from the back of the car is a bad pinion bearing when it's really loose lugnuts...oh wait...

Love ya man!

Chris
C. Ludwig is offline  
Old 02-02-03, 09:03 AM
  #3  
Senior Member
5 Year Member
 
Join Date: Oct 2001
Location: Louisville Kentucky
Posts: 271
Likes: 0
Received 0 Likes on 0 Posts
If James wants a good, relatively new LSD he should buy it from the guy with all the third gens in town. Or he can check lug nuts for noise.
Miss Mazda is offline  
Old 02-02-03, 09:25 PM
  #4  
Senior Member
iTrader: (3)
 
JDuncan's Avatar
 
Join Date: Mar 2001
Location: Louisville, KY, USA
Posts: 701
Likes: 0
Received 0 Likes on 0 Posts
I think if my car had weird noises coming from the back, I would check the lug nuts, not sell it to some guy in Louisville thinking the diff was going out.

Also, I think Miss Mazda knows where there is a diff that this James guy really really wants, and she has more pull with that 3rd gen guy, so maybe she can pull a couple of strings for him. Pretty please!

As for the shimming statement, it would still be considered rebuilding to the extent that you are pulling the lsd and disassembling it. According to the lead mechanic at a local race (YES, race not rice) shop, the road racers are placing shims under the clutch pads to increase the locking force of the diff and to extend the overall life of it. I too, would like to know what others have to say about this and whether or not it is feasible or even reasonable.
JDuncan is offline  
Old 02-03-03, 09:22 AM
  #5  
male stripper
10 Year Member
Thread Starter
iTrader: (1)
 
jeremy's Avatar
 
Join Date: Oct 2001
Location: St Petersburg, FL
Posts: 3,131
Likes: 0
Received 1 Like on 1 Post
i don't like you guys and you will all burn in hell.

anyone else?
jeremy is offline  
Old 02-03-03, 11:28 AM
  #6  
Full Member
5 Year Member
 
buttlips's Avatar
 
Join Date: Dec 2001
Location: Yep
Posts: 119
Likes: 0
Received 0 Likes on 0 Posts
We shim the LSDs in our FB race cars. We don't do it to get rid of noises, but to lessen the amount of slip.

Mazda built those diffs with more slop than you would really want in a race car. To cure it, Mazda Competition sells a thicker clutch disk. All we do is take out one of the stock disks, and replace it with a thicker one.
buttlips is offline  
Old 02-03-03, 02:41 PM
  #7  
Senior Member
5 Year Member
 
twister's Avatar
 
Join Date: Jan 2002
Location: Melbourne, Australia
Posts: 300
Likes: 0
Received 0 Likes on 0 Posts
In our Improved Production category (Australia) many of us have gone away from using the LSD and gone to the Torque Biasing Diff from Guru Racing. Much improved over the Mazda LSD by far. I have heard they have sold several into Texas and now Ari Yallon has a couple of the Gen 2 in stock as well as the Gen 1 I think.

Any of you guys tried them yet?
twister is offline  
Old 02-03-03, 02:43 PM
  #8  
male stripper
10 Year Member
Thread Starter
iTrader: (1)
 
jeremy's Avatar
 
Join Date: Oct 2001
Location: St Petersburg, FL
Posts: 3,131
Likes: 0
Received 1 Like on 1 Post
well this was talked about as a cheap ghetto way to tighten it without spending all the $$$ for a rebuild. iwas just wondering the pros and cons as well as how to do it.
jeremy is offline  
Old 02-03-03, 04:23 PM
  #9  
www.lms-efi.com
iTrader: (27)
 
C. Ludwig's Avatar
 
Join Date: Mar 2001
Location: Floyds Knobs. IN
Posts: 5,106
Received 30 Likes on 23 Posts
Seriously I'd guess you're going to run into the same expense as you were looking at just for a rebuild. Like Buttlips says you'll need the thicker plates and not just a simple piece of shim stock. Have you priced the parts through Mazdaspeed? I'm guessing yes.

Chris
C. Ludwig is offline  
Old 02-03-03, 06:20 PM
  #10  
www.lms-efi.com
iTrader: (27)
 
C. Ludwig's Avatar
 
Join Date: Mar 2001
Location: Floyds Knobs. IN
Posts: 5,106
Received 30 Likes on 23 Posts
Just checked the price of the plates and discs. You'll need 8 of each. Price for the parts for the comp LSD are $21 per. So with all new friction parts you're looking at $170 or so. That's for the comp pieces. They don't list the pieces for the stock LSD on the website. I would guess they're similarly priced. That's much cheaper than you were thinking a while back.

Chris
C. Ludwig is offline  
Old 02-03-03, 09:51 PM
  #11  
Senior Member
10 Year Member
iTrader: (3)
 
jrx13's Avatar
 
Join Date: Mar 2001
Location: San Francisco, California
Posts: 266
Likes: 0
Received 0 Likes on 0 Posts
Whoah! You guys are confusing me! Ok I am trying to rebuild a LSD clutch pack. Mazdacomp says they have friction discs & plates for THEIR competition differential. If I have a stock diff, don't I have to use the stock replacement type? They do have oversize stock friction plates/discs but in the manual there is a certain specification you are shooting for. Are all the racers just sticking in all oversize discs/plates and just throwing it together? Please let me know!
jrx13 is offline  
Old 02-04-03, 12:05 PM
  #12  
male stripper
10 Year Member
Thread Starter
iTrader: (1)
 
jeremy's Avatar
 
Join Date: Oct 2001
Location: St Petersburg, FL
Posts: 3,131
Likes: 0
Received 1 Like on 1 Post
lol, thing is chris, i still owe you for the rearend. that was why i was seeing if this was a super cheap alternative. like wedge a hunk of oak in there, lol.
jeremy is offline  
Old 02-04-03, 05:12 PM
  #13  
www.lms-efi.com
iTrader: (27)
 
C. Ludwig's Avatar
 
Join Date: Mar 2001
Location: Floyds Knobs. IN
Posts: 5,106
Received 30 Likes on 23 Posts
Got $10? Know a guy that can weld it.

Chris
C. Ludwig is offline  
Old 02-05-03, 09:07 AM
  #14  
male stripper
10 Year Member
Thread Starter
iTrader: (1)
 
jeremy's Avatar
 
Join Date: Oct 2001
Location: St Petersburg, FL
Posts: 3,131
Likes: 0
Received 1 Like on 1 Post
Originally posted by C. Ludwig
Got $10? Know a guy that can weld it.

Chris
lol. so i can hop around corners? no thanks, i'll just throw saw dust into it.
jeremy is offline  
Old 02-05-03, 06:11 PM
  #15  
www.lms-efi.com
iTrader: (27)
 
C. Ludwig's Avatar
 
Join Date: Mar 2001
Location: Floyds Knobs. IN
Posts: 5,106
Received 30 Likes on 23 Posts
Nah do it dog. Then you can say ya got your drag setup! You already have the struts set as minimum rebound for that killer weight transfer.

Chris
C. Ludwig is offline  
Old 02-07-03, 12:10 PM
  #16  
male stripper
10 Year Member
Thread Starter
iTrader: (1)
 
jeremy's Avatar
 
Join Date: Oct 2001
Location: St Petersburg, FL
Posts: 3,131
Likes: 0
Received 1 Like on 1 Post
lol. the damn thing used to have quite a bit of power on oversteer in the wet. now you'd have to floor it to get it to step out. i need another job.................too many things.
jeremy is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
toplessFC3Sman
2nd Generation Specific (1986-1992)
6
03-20-18 01:54 PM
Wehavetocook
New Member RX-7 Technical
2
09-23-15 11:04 PM
Rotospectre
New Member RX-7 Technical
0
09-13-15 11:22 PM


Thread Tools
Search this Thread
Quick Reply: shimming clutch lsd


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: