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 Post subject: LSD's
PostPosted: Tue May 13, 2008 11:04 am 
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848cc
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Joined: Thu Jan 19, 2006 6:48 pm
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Location: Salisbury Heights SA
Hey guys,
I was just wondering if anyone knows of someone who builds or makes cheap LSD diffs? I heard something about holden torana diffs being converted to suit a mini?? Is this true?

I realise LSD and cheap should never be put in the same sentence. lol

Cheers guys


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 Post subject:
PostPosted: Tue May 13, 2008 11:54 am 
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1275cc
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Location: Queanbeyan
yep your right, cheap and LSD should never be put in the same sentences

There is a guy in QLD who used to make a sort of LSD you might be able to find out more from the miniman and if Fred is still doing it, not for a road car though , give matt a PM on here and ask him

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 Post subject:
PostPosted: Tue May 13, 2008 12:01 pm 
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1275cc
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Joined: Mon Sep 19, 2005 4:57 pm
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Location: Gulgong
Why do you want an LSD ????

They are not of fun on a road - necessary for racing (all types - crossX, LSD, locked) but very hard on uni joints and the like and increases torque steer. It also increases the steering effort under load.

If its for burnouts and the like, it will only reduce the time it takes to destroy a gearbox and snap a centre main bearing cap.

Mike.


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 Post subject:
PostPosted: Tue May 13, 2008 12:54 pm 
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1275cc
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Joined: Tue Mar 16, 2004 10:34 am
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Location: Canberra
Mike_Byron wrote:
Why do you want an LSD ????

They are not of fun on a road - necessary for racing (all types - crossX, LSD, locked) but very hard on uni joints and the like and increases torque steer. It also increases the steering effort under load.

If its for burnouts and the like, it will only reduce the time it takes to destroy a gearbox and snap a centre main bearing cap.

Mike.


It's odd, the one Mini I've driven with an LSD was brilliant. Much better than my car. Only fault was the steering was a little heavier at low speeds.


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 Post subject:
PostPosted: Tue May 13, 2008 2:00 pm 
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1275cc
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Location: Gulgong
Okay - I will rephrase that - it obviously improves traction and I guess its how "tightly" the diff is setup.

If the suspension is properly set up and balance with optimum angles for castor and camber then its one more adjunct to better handling when driven properly. But all the comments on increased loads and increased steering effort still apply.

Simply just throwing in an LSD is not going to make a mini a nice car to drive.

Mike


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 Post subject:
PostPosted: Tue May 13, 2008 2:08 pm 
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1275cc
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The car in question that I drove had all the adjustable suspension components, and they were all adjusted properly. And the LSD was of the more 'streetable' varieties.

At the time, I had picked that the car handled much better than mine, and put the power down when turning a whole lot better - but I didn't know it had an LSD fitted until somebody pointed it out later.

I would definitely consider fitting one to my own car, but I think the money could be much better spent in other areas first - as you say, an LSD can be a finishing touch to an otherwise well setup car, but isn't the first step.


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 Post subject:
PostPosted: Tue May 13, 2008 2:26 pm 
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848cc
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Joined: Thu Dec 07, 2006 12:15 pm
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There is a guy in Hotbricks SA who used to make LSD's, PM me for details, not sure if he wants his name splashed around....


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 Post subject:
PostPosted: Tue May 13, 2008 4:41 pm 
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998cc
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Location: fitzroy, sojo, victoria
I am pretty sure that KAD in the UK make 'em. Sure to be anything but cheap tho.


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 Post subject:
PostPosted: Tue May 13, 2008 4:43 pm 
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http://www.swiftune.com/NewsArticle/1/a ... lobal.aspx

Doogie

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 Post subject:
PostPosted: Tue May 13, 2008 5:04 pm 
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Yeah i run the ATB type diff in my minis, they`re very very good

But there`s always a place for a less expensive type diff like Freddy Sayers diffs, they`re also very good.

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 Post subject:
PostPosted: Tue May 13, 2008 5:39 pm 
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1275cc
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Matt are they suitable for a road car/daily drive?

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 Post subject:
PostPosted: Tue May 13, 2008 6:28 pm 
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848cc
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Joined: Thu Jan 19, 2006 6:48 pm
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Location: Salisbury Heights SA
Okay,

So what is the LSD made my Fred Sayers? what kind is it?
Also what is the ATB LSD???

Cheers Guys


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 Post subject:
PostPosted: Tue May 13, 2008 6:37 pm 
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998cc
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Location: Canberra, ACT
I have a quaife diff in the race car.... it is very easy to drive with as it is NOT a true LSD - if you lift a wheel - you loose drive just like a normal diff but otherwise it biases drive .. well I'll let them explain ....
http://www.quaife.co.uk/What-is-a-Quaife-ATB-differential

Quote:
With an normal open differential, fitted as standard on most cars, much precious power is wasted through wheel spin under acceleration. This happens because the open differential shifts power to the wheel with less grip - along the path of least resistance.

The Quaife differential, however, does just the opposite. It senses which wheel has the better grip, and automatically biases the power to that wheel. It does this smoothly and constantly, and without ever completely removing power from the other wheel.

In cornering, while accelerating out of a turn, the QUAIFE biases greater power to the outside wheel, reducing inside-wheel spin. This allows the driver to begin accelerating earlier, exiting the corner at a higher speed.

The Quaife differential also controls loss of traction when the drive wheels are on slippery surfaces such as ice and snow or mud, providing the appropriate biased traction needed to overcome these adverse conditions. The Quaife ATB Helical LSD differential provides constant and infinitely variable drive. Power is transferred automatically without the use of normal friction pads or plates seen in other limited-slip designs.


... and it worked very nicely in the rain at Eastern Creek the other week...

The great thing with their new design is that you can use standard crown wheel and pot joint outputs.... reducing the cost considerably in setting it up ... that said still not cheap..(but cheaper than other LSD options). I've bought one for the Historic Rally car project.... (though have also got Pot Joint to Hardy Spicer fittings)

I'd have no hesitation in using them on the road from my experiences ...(and hence why got for the project)


Last edited by MINImal effort on Tue May 13, 2008 6:41 pm, edited 1 time in total.

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 Post subject:
PostPosted: Tue May 13, 2008 6:38 pm 
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ET 13.457 seconds , OH YEAH !!!!
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The ATB diff is an Automatic Torque Biasing diff.

It uses worm gears to operate and it very suitable to road use, it uses multiplication of the amount of slip and then transfers more drive to the other wheel. The only downside is if you are lifting a wheel off the ground 2.5 x 0 is still nothing so it will behave like an open diff.

Really easy to drive with and feel like an open diff around car parks, they have a lifetime warranty and dont require any servicing or rebuilds.

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 Post subject:
PostPosted: Tue May 13, 2008 8:18 pm 
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998cc
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Joined: Wed Jul 11, 2007 6:01 pm
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Location: Sydney
you go have some LSD and that will make it a good ride. :D

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