well ive just heard that it would be a bad idea to keep the underdrive crank pulley on my truck since im going to put a radix on it. is this true? what will it do if i leave it on, and should i ditch the ud alt. pulley as well?

 

Yes, ditch the underdrive pulleys. The underdrive crank pulley will spin the blower much slower and kill the boost output for a given blower pulley. Sell the underdrive pulley and put a stocker back on. Also, I would highly recommend pinning the stock crank pulley when you put the radix on. If not there is a very good chance it will spin on the crank and back the bolt out causing all kinds of bad things. I know from first hand experience. Pin the crank and live a stress free life.

If the alt pulley is underdrive I would get rid of it because it ain't going to do you any good. If it is a overdrive pulley and you have charging problems or something you could keep it.

 

sweet thanks. its for sale!!

 

im interested in the alt pulley if the price is right.