Originally Posted by KaBlookie
^ eeh, maybe you'll get a tiny bit more to the wheels with those lightweight pulleys, and it might be a bit noticeable to the butt dyno, but at the same time you're noticeably lowering the efficiency of the alternator, PS pump, and AC condensor, which isn't always a good thing.
Exactly. For $300, you're netting maybe 3hp across the rev range.
And I'm still wary about aftermarket crank pullies and the potential issues of harmonic balance.