Quaife Limited Slip Mini Cooper

QUAIFE Limited Slip Differentials and Gearsets

Articles and Additional Information

MINI Coupe Performance Package from AC Schnitzer
BMW Group tuning specialist AC Schnitzer has gotten a hold of a 2012 MINI Cooper Coupe and has wasted no time getting to know it personally.
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HS-Racing VTEC Race Mini
This is the story about HS-Racing in Sweden.It started with a dream, a dream to be fast and furious, but most of all - HAVING FUN !
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QUAIFE Engineering History
That story began forty years ago when engineering entrepreneur Rod Quaife acted upon a chance suggestion from Norton motorcycle specialist Ray Petty. It was tempting enough for Rod to change his strategy he was then involved in and began afresh to specialise in motorcycle gearbox design and production. Enthusiasm and skill made good any financial shortcomings in these early days, and soon the new company - known as RT Quaife Engineering Ltd - began producing the first Quaife transmissions that converted four speed Norton gearboxes into five speed units. Motorsport success soon followed, culminating in John Cooper testing at the TT on a Quaife equipped 350 Norton in 1967.
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Quaife Engineering Ltd
Quaife Engineering's automotive performance product range covers: ATB Differentials for road and motorsport use Performance gear kits for cars, motorcycles and motorcycle engined cars Replacement race / rally gear boxes Specialist reversing boxes and gear trains for niche vehicles Uprated drive shafts & half shafts Complete heavy duty axle kits Four wheel drive systems GT sports racing cars in either 2 or 4WD
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Quaife Limited Slip Differentials
The Quaife Differential powers both drive wheels under nearly all conditions, instead of just one. With an ordinary open differential, standard on most cars, a lot of precious power is wasted during wheelspin under acceleration. This happens because the open differential shifts power to the wheel with less grip (along the path of least resistance). The Quaife, however, does just the opposite. It senses which wheel has the better grip, and biases the power to that wheel. It does this smoothly and constantly, and without ever completely removing power from the other wheel.
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Gearbox - Up-rating diffs and FDs.
The standard diff unit’s componentry falls well short in the performance stakes. As an absolute minimum you should fit an up-rated diff-pin - whether this is because your racing regs don’t allow alternatives, or merely for the road - along with new planet-wheels and thrust washers.
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GEARBOX - Limited Slip Diffs, what's available.
‘Salisbury’ is the word banded about by most un-enlightened folk when discussing LSDs for Minis, mistakenly believing the word covers all Mini orientated LSDs. This is grossly incorrect. The ‘Salisbury’ was designed in the ‘50s at a time when racecars were a good deal less sophisticated than today. Tyres were usually cross-ply with severely limited grip due to poor compounds developed ostensibly for rear-wheel-drive cars; the front wheel drive of the Mini being a rarity.
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GEARBOX - Limited Slip Diffs; necessary parts for installation.
Fitting an LSD isn't as simple as replacing the diff cage unit. In all cases a certain degree of diff housing modifications is needed - material needing to be ground/filed away to provide clearance for larger diff housing cases and crown wheel bolts. Although it has to be said the Quaife diff is supposed to fit without these mods. I've never found that.
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