Pro Stock cars have traditionally added flywheel weight given they have no issue getting engine RPM and the added weight helps maintain engine RPM during launches and shifts.
- EM
Maybe in the 1970's but not in the last few decades. The entire flywheel, pressure plate and multiple discs can be under 15#. The fly wheel is just a place to mount the very small billet aluminum adjustable pressure plate and the starter ring gear. All the excess material is milled away. The entire assembly is as light as they can make it.
Heavy flywheels are for dump trucks.
