The weight difference is bizzare. Crank pulle goes from 8+ to 1lb.
Can you still use the intercooler fan with the RJC pulleys?
http://www.rjcracing.com/RJC_Buick_Products/RJC_Billet_Alum__Pulleys/rjc_billet_alum__pulleys.html
Pulley Weights (All of our pulleys are 100% stock dia.)
Factory Stock Crank Pulley with intercooler fan; 8+lbs.
Factory Stock Crank Pulley no intercooler fan; 6 lbs. 2 oz.
RJC Billet Aluminum Stock Style Crank Pulley no fan. 1 lb. 10 oz.
RJC Billet Aluminum Race Style Crank Pulley Razor 1 lb. 1 oz.
RJC Billet Alum. Race Style Crank Pulley Undersize 15oz.
Factory Stock Steel Water Pump Pulley 1 lb. 8 oz.
Competitors Billet Aluminum Water Pump Pulley 8 oz.
RJC Billet Aluminum Water Pump Pulley "Razor Style" 7oz.
Factory Stock Steel Power Steering Pump Pulley 1 lb. .
RJC Billet Alum. Power Steering Pulley "Razor Style" 7oz.
Factory Stock Steel Idler Pulley 10 oz.
RJC Billet Aluminum Pulley "Razor Style"with bearing 4oz.
Factory Stock Steel Alternator Pulley 7 oz.
Competitors Billet Aluminum Alternator Pulley 3 oz.
RJC Billet Aluminum Alternator Pulley "Razor Style" 2.3oz.
By going to RJC Billet Aluminum Pulleys you can loose over 9 Lbs. of reciprocating weight.
This is equivalent to removing 95 lbs. of non reciprocating weight.