94gt8er

Hi I was wanting to know if Underdrive Pulleys was a good buy or not?
Also what gain will they give me and what brand?Thanks

~BuMps AloT~

iTrader: (5)

Didnt really like the set i had on my car. At idle it would let the voltage drop unbelievably low. I woundnt invest in a set if i were you.

jaycenk

iTrader: (1)

Buy a 10% reduction damper. Virtually no gain out it though.

carguyshu

iTrader: (8)

not worth it. underdrive pulleys on most cars get the majority of their power from getting rid of the water pump which is cam driven in an LT1. You would be better off getting an electric water pump than doing pulleys.

The only things that a pulley will spin slower are the alternator (which doesn't use much power), the a/c (which when off isn't going to use any power & when on will perform like crap at idle with a pulley) & the power steering pump (which again if you have bigger tires wouldn't be the greatest idea in the world).

I wouldn't put a pulley set on if it were given to me free b/c of low charge from alt, low a/c performance at idle, & very low HP gain.

lt1-xjs

I can only recommend the ASP 945103 set. The integrated damper is 2-3 lbs. lighter than stock. Never had an issue for 6 years.

MasterTomos

iTrader: (15)

A lot of people have had issues with the alternator charging, low amps, ect. ect. with underdrive pulleys.

The gains are extremely minimal, and many people (including myself) feel it's not worth the hassle or money for the few extra HP (literally 1 or 2hp, some claim/have proven less)