Will i notice a difference in throttle response with this pulley? I was always skeetchy about buying lightweight pulleys.
Throttle response = NO
Engine resp = YES
Whenever you reduce the weight from the rotating assembly you "free up" HP that is already there. i:e: pullies, Forged crank, forge pistons, hollow cams..etc
Since there is less weight on the crankshaft assembly, It "spins" a little bit faster. It doesnt take as much effort to rotate the crankshaft and so on, so it should run through the RPM's a lil faster.