My car is now too powerful

[R32UK]

What exactly does a Quaife do?? I mean, where does it fit and what does it modify?

The Quaife is a Torque biasing Limited Slip Differential. Basically it distributes the power to the front wheels. Once it feels one of the wheels slipping it transfers the power to the other wheel where it can best be used.

The standard car has what is called an open differential. This will deliver power to each wheel regardless of wheel slip.

Hurdy.. I thought it was where it delivers power to the wheel that is loosing grip. e.g the front right wheel when going round a left hand bend. Where as the normal esp sends power to the wheel with most grip?? 

[Jkctr]

No, if it deliverd power then that wheel would be useless mate. The wheel with the most grip can use the power so it sends it there. Basically what the haldex does, sends power to the rears when the front cant grip. (although a diff and the haldex are completely different, just an example so you understand)

[ifti]

Cool, I get it now.
Another lesson learnt

[Hurdy]

What exactly does a Quaife do?? I mean, where does it fit and what does it modify?

The Quaife is a Torque biasing Limited Slip Differential. Basically it distributes the power to the front wheels. Once it feels one of the wheels slipping it transfers the power to the other wheel where it can best be used.

The standard car has what is called an open differential. This will deliver power to each wheel regardless of wheel slip.

Hurdy.. I thought it was where it delivers power to the wheel that is loosing grip. e.g the front right wheel when going round a left hand bend. Where as the normal esp sends power to the wheel with most grip?? 

ESP (electronic stability programme) works differently. It individually brakes a wheel/s to bring the car back into line when it detects instability. The Quaife works instantly as it is mechanical and distributes more power to the wheel with the most grip and reducing it to the one that has less grip, utilising the power better and at the same time eliminating instances where the ESP or traction control would have normally cut in. AS ESP and Traction control don't cut in as often, the engine, clutch and transmission are under less stress and the Quaife may actually improve the lifespan of the cars drivetrain.

[stealthwolf]

Driving any TVR is an experience that to my mind no other car manufacturer can match...fear of dying

One of my mates has a TVR. Dunno which one but he always tells me about how you can drive it round the same corner 7 times in a row with no problems and come the 8th time, for no reason, it will spin out. He's had two lucky escapes so far....

[topher]

Noone has still quite nailed it.. and I'm rubbish at explaining things without drawing pictures or waving my hands around , so give this a read http://www.autotech.com/quaife/differentials/diffs.htm

[R32UK]

I was right!!! 

nearly

[Dogbucket]

So in my mind no trick diff in the world is going to make that much difference in a straight line (assuming the road surface is the same for both wheels).

The new Focus with 300bhp FWD and a Quaife gets rave reviews in the way it handles the power, so have the Quaife adopters seen any benefits in a straight line?

[ifti]

Noone has still quite nailed it.. and I'm rubbish at explaining things without drawing pictures or waving my hands around , so give this a read http://www.autotech.com/quaife/differentials/diffs.htm

Thats a great link, and a great explanation.
Are these things costly??

[Jkctr]

So in my mind no trick diff in the world is going to make that much difference in a straight line (assuming the road surface is the same for both wheels).

The new Focus with 300bhp FWD and a Quaife gets rave reviews in the way it handles the power, so have the Quaife adopters seen any benefits in a straight line?

It has 'revoknuckle' mate,

If you get bored
http://www.not2fast.com/chassis/revoKnuckle.pdf
http://forums.focaljet.com/suspension/585922-future-fwd-performance-revo-knuckle.html

Basically a tweaked MacPherson strut set-up.

Amusingly it was also first developed for turbo diesel cars, not hot hatches