How much power can I extract from upgrading my pulleys to lightweight pieces?


Is it worth it?

 

Kind of a touchy topic among tuners/vendors. Half say they're OK to use, some DO NOT use them or reccomend them such as Buschur, AMS, Dynoflash, etc.

That is for crank pulley - as for other pulleys like alternator and P/S, I couldnt see that being a problem reliability wise, however power increases from them would be minimal at best. THe real power (or so it would seem) is in crank pulleys.

 

I had bad results when I installed a lightweight crank pulley in my LT1 engine. The stock pulley had a special rubber in the middle to absorb vibrations and the aftermarket not.

I do not know how is the Evo pulley. Anyway, I will not touch in any crank pulley anymore.

 

EVO pulley is the same way, it has a harmonic dampener to absorb vibrations, same as the LT1.

As for the other pullies, Im really not sure. I dont think many people have the PS and ALT pullies, people that do should chime in!