what will a racing clutch do performance wise that a normal one would not...

 

If your stock clutch is like new and working perfectly, and your car is putting out near stock HP, probably nothing. If your clutch slips or you have significantly more power, then it will allow you to have better launches, and crisper shifts being it wont slip as much. You probably dont want to go overkill on the clutch either. Its better to have the clutch slip slightly than to shock the tranny and driveshaft and break something.

 

Whatever you do, DON'T GET a UNSPRUNG one!!!

 

What is the difference between sprung and unsprung clutches?

-Jacob

 

This is not the best explanation but here it goes:

The sprung clutches has some springs on it that will allow some "movement" when the clutch meets the flywheel. The springs kind of absorbs some of the movement or "impact". On a unsprung clutch, there is nothing to absorb some of the movement or "impact", so there is a more "direct" connection from the engine to the tranny when the clutch meets the flywheel.

Does it makes sense?

 

no springs = pain in the *** (for a daily driver)

 

And broken NA trannies......