[MJN]

speed220mph.

I don't really want the weight of a dual disc clutch, I'm already thinking of going to an aluminum flywheel to reduce the drivetrain inertia. And a circle track small diameter multi disc clutch is probably not going to to work too well on the street.

The dual friction clutch disc sounds like a good bet and will be considered along with the centerforce. The problem with the characteristics of the centerforce and the torque curve of my motor is that the centerforce increases clamping load as the rpms increase and my motor puts 412 ft lbs of torque to the tires at only 2300 rpm so I don't think it would be as effective as it would on say a 7000 rpm open track car. I really need a clutch that has a higher coefficient of friction and a higher clamping force or the right combination of the two. And as far as I can tell that is going to be the trick, to find the right pedal pressure, not too high, and the right coefficient of friction disc that is not too grabby or harsh.

Good inputs, thanks guys....