Hey folks
I have removed my heavy clutch fan and was toying with the idea of an underdrive crank pulley…but for the price, can i do any better with something else?
underdrive pullys = bad vibrations
They also underdrive your alternator which lowers your voltage and if you are running electric fans makes it even worse…ask me how I know 
Id personally skip it.
what would put the $90 to better use
i have intake and full exhaust / header
well if ur thinking of going with a underdrive pully id say go to the casino, play black jack, hopefully you win alot of money, buy a turbo, and if u dont win anything and lose all your money its still better than having to replace a blown motor due to the lack of a harmonic balancer on the motor
LOL there has to be something else…
i dont gamble
well wait i do…i have a 240
-subframe spacers from Bing
-High voltage coil
-save more and get MSD
that is my “cheap” mod list.
Theo