Tolerance of a LSD

Prunes · Post by **Prunes** » Sat Feb 27, 2010 1:57 pm

Guys out of interest, how much tolerance would a standard NA diff have as far as speed difference between front and rear wheels before it started to cause noticeable effects on the car.

Just thinking of different tire sizes front and rear, would say .5 km/h difference at 100km/h cause the differential to start locking up?

brumbyrunner · Post by **brumbyrunner** » Sat Feb 27, 2010 7:50 pm

Depends on the car.

AlpineRaven · Post by **AlpineRaven** » Sat Feb 27, 2010 9:08 pm

brumbyrunner wrote:Depends on the car.

and type of the diff & engine output & surface/windy etc.
Cheers
AP

YouTube · Post by **El_Freddo** » Sun Feb 28, 2010 7:10 pm

Are we talkinga about a rear LSD or a centre LSD? You've not really given us a lot of details to help you out...

Cheers

Bennie

Prunes · Post by **Prunes** » Tue Mar 02, 2010 9:53 am

Ok. lets say EJ25 NA engine, VLSD center diff, Used for on road daily driving and perhaps with a clutch LSD in the rear.

The idea is 245/50R16 rear and 205/60R16 front which is a 0.2% difference in speed or something similar.

Gannon · Post by **Gannon** » Tue Mar 02, 2010 3:10 pm

Um...... no.

Is it very recommended that you have the exact same size on both front and rear. Subaru even recommends that the front and rear are the same brand and make, and have same amount of wear.

Why do you want different sizes?

Prunes · Post by **Prunes** » Tue Mar 02, 2010 3:29 pm

Partly out of interest, partly because I think it would look tough and allow you to not destroy the turning arc by putting fat tires on the front.

vincentvega · Post by **vincentvega** » Tue Mar 02, 2010 4:35 pm

stupid idea. move on

AlpineRaven · Post by **AlpineRaven** » Tue Mar 02, 2010 6:08 pm

Prunes wrote:Partly out of interest, partly because I think it would look tough and allow you to not destroy the turning arc by putting fat tires on the front.

even 0.2% is a difference - you'll wear out your centre diff.
cheers
AP

Prunes · Post by **Prunes** » Tue Mar 02, 2010 9:03 pm

Question answered thanks guys, scrub that one off the list of my many ideas.

discopotato03 · Post by **discopotato03** » Wed Mar 03, 2010 11:22 am

Yeah AWD means more tractive effort and the fronts do all of the steering and most of the braking .

A .