Crank hp is nothing but your whp is thing to be worried about you can have all the crank hp in the world but if it can't be transfered efficently to your transmission and then to the ground is the real matter. That why upgrading your your crank pulley to a light weight and alumium flywheel should be upgrade to those who really want to see the true power of their cars by reducing the stress of the motor to turn those heavy cast iron parts by using alumuim.

Also using these alumium parts allow you car to get to 190whp (for example) alot quicker than using cast iron parts.