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Old 02-01-2013, 11:06 AM   #1
bigdesignmachine
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Performance gains after LSD install?

Has anyone installed at any point the Quaife LSD for the SVT? I am wondering what kind of performance gains did you see? Were they noticeable? Did the car feel as if it was grabbing more?

Quaife as of yet does not produce a differential for the 2013 ST although they do provide the differential for the RS500.

Any information would be appreciated!


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Old 02-01-2013, 11:36 AM   #2
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I am moving this to "ST performance" for you. As far as I know installing a LSD only helps with gaining more traction. You won't see any performance gains out of it as in more power. It just keeps you from doing the peg-leg burnouts. Also to note, Quaife made differentials for most models of the Focus.
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Old 02-01-2013, 11:48 AM   #3
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yeah

i also know they supply the differential in the RS500 so it would seem logical that an MMT6 gearbox differential would be produced at some point. Especially with the ST being global
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Old 02-01-2013, 03:33 PM   #4
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Quaife already has one out for the st
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Old 02-01-2013, 04:43 PM   #5
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You are correct.

Found this on their site after altering my search.


Ford Focus ST225 M66 Quaife ATB Helical LSD differential
http://www.quaife.co.uk/shop/products/qdf13j-0

The ST225 isnt the 2013 ST though if I am not mistaken so this differential is not made for the new ST
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Old 02-01-2013, 07:35 PM   #6
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Quote:
Originally Posted by bigdesignmachine View Post
You are correct.

Found this on their site after altering my search.


Ford Focus ST225 M66 Quaife ATB Helical LSD differential
http://www.quaife.co.uk/shop/products/qdf13j-0

The ST225 isnt the 2013 ST though if I am not mistaken so this differential is not made for the new ST
That sounds like it was for the MK2 Focus ST which used a volvo engine and gearbox, the 2013 Focus ST uses the MMT6 gearbox, not an M66, so it wouldn't likely work at all.
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Old 02-01-2013, 09:16 PM   #7
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Quote:
Originally Posted by suss6052 View Post
That sounds like it was for the MK2 Focus ST which used a volvo engine and gearbox, the 2013 Focus ST uses the MMT6 gearbox, not an M66, so it wouldn't likely work at all.
So that would make my comment correct then.
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Old 02-01-2013, 09:40 PM   #8
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Quote:
Originally Posted by Macky21 View Post
I thought the RS and RS500 used electronic torque vectoring? I remember Clarkson talking about it on the Top Gear episode
Nope, the RS used good old fashioned mechanical tuning (with a new suspension geometry to keep things in line via the revo-knuckle) and a quaife LSD.

Quote:
Originally Posted by bigdesignmachine View Post
So that would make my comment correct then.
Yeah, its not for the 2013+ Focus ST or the MMT6 gearbox, therfore there is not currently an off the shelf limited slip differential for these cars.
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Old 02-01-2013, 06:56 PM   #9
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I installed a Torsen on my svtf. Difference was night and day. The 13's have an e-diff right? I read that a mechanical diff might help if you track your car.
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Old 02-01-2013, 08:21 PM   #10
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I thought the RS and RS500 used electronic torque vectoring? I remember Clarkson talking about it on the Top Gear episode
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