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

LSD vs Welded diff

Old 02-04-16, 08:50 AM
  #1  
Junior Member
Thread Starter
 
Join Date: Dec 2014
Location: wisconsin
Posts: 40
Likes: 0
Received 0 Likes on 0 Posts
WI LSD vs Welded diff

My friend says that a LSD that is shimmed to act almost as a welded differential will have less power loss than an actual welded differential. Is this true? Thank you
datwhiterx7 is offline  
Old 02-05-16, 11:52 PM
  #2  
Eats, Sleeps, Dreams Rotary
 
Valkyrie's Avatar
 
Join Date: Oct 2004
Location: Japanabama
Posts: 4,210
Received 6 Likes on 6 Posts
Welded diffs have no place anywhere than NASCAR, drag racing, or a drift missile.

There's no "power loss" to worry about. But any LSD is going to be easier to turn than a welded diff or spool.
Valkyrie is offline  
Old 02-06-16, 04:13 AM
  #3  
Very Stable Genius
iTrader: (1)
 
WANKfactor's Avatar
 
Join Date: May 2011
Location: omnipresent
Posts: 1,258
Received 63 Likes on 56 Posts
Some of those monster porsche le mans cars from the 70's and 80's ran full spool. Just sayin.
WANKfactor is offline  
Old 02-06-16, 08:38 AM
  #4  
Fistful of steel
iTrader: (7)
 
LargeOrangeFont's Avatar
 
Join Date: Nov 2008
Location: OC, So Cal
Posts: 2,146
Received 8 Likes on 8 Posts
Originally Posted by Valkyrie View Post
Welded diffs have no place anywhere than NASCAR, drag racing, or a drift missile.

There's no "power loss" to worry about. But any LSD is going to be easier to turn than a welded diff or spool.
They don't use spools or welded diffs in NASCAR.

And yes, your friend does not know what he is talking about.
LargeOrangeFont is offline  
Old 02-06-16, 09:38 AM
  #5  
Armchair engineer
iTrader: (2)
 
j9fd3s's Avatar
 
Join Date: Mar 2001
Location: http://www.k2rd.com
Posts: 24,491
Likes: 0
Received 116 Likes on 106 Posts
Originally Posted by datwhiterx7 View Post
My friend says that a LSD that is shimmed to act almost as a welded differential will have less power loss than an actual welded differential. Is this true? Thank you
not sure what power loss means? the diff is just along for the ride except when you're turning, and you're probably not using all the power in a turn, so it A) doesn't matter and B) the LSD takes some power, but that is how its limiting wheel spin, which is why you have it.
j9fd3s is offline  
Old 02-06-16, 10:20 AM
  #6  
Death to Infinite Scroll
 
peejay's Avatar
 
Join Date: May 2001
Location: Cleveland, Ohio, USA
Posts: 11,682
Received 40 Likes on 37 Posts
Originally Posted by LargeOrangeFont View Post
They don't use spools or welded diffs in NASCAR.

And yes, your friend does not know what he is talking about.
In drag racing, a lot of the guys who bother testing know that a spool is generally a tenth or two slower than a limited slip. Tires never have the same rollout.
peejay is offline  

Thread Tools
Search this Thread

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: