Hey, Ok so i am lookin at getting a set of

Unorthodox Racing Ultra Street Lightened Underdrive Crank Pulleys

and a fidenza flywheel ,

well a friend told me that i shouldnt get the flywheel and the pullys either one or the other, and when i asked him why he said that the motor will spin the bearings and screwing the motor BIG TIME.

if this isnt true then im going with the setup... Thanks guys

 

The flywheel is fine, I wouldn't suggest getting the lightweight crankshaft pulley unless you have the rotating assembly balanced to the weight of the pulley. Even then, there aren't any noticeable gains to be expected. Always use some type of Harmonic Damper/Balancer!

If your dead set on using one, use the "Fluid damper".