RJC Racing Billet Aluminum Pulleys

Performance is a funny thing. When the discussion turns to improving a vehicles acceleration capabilities, the first thing to come to mind is adding horsepower.. This makes sense, since acceleration is merely a function of horsepower vs. weight: the more power you have to accelerate a given weight, the better it will accelerate. Though adding horsepower is a surefire method of making your car faster, the flip side of the equation is also true. Removing weight from your car has the same effect as adding horsepower; after all, the engine now has much less mass to get moving.

Any rotating object offers resistance to a change in its rotational speed. It takes power to start spinning and power to stop it. Once its spinning, the resistance drops off, as it is much easier to keep it spinning than to start or stop it. The resistance is known as moment of inertia (MOI). The MOI of an object is determined by the diameter and the mass of the object. Increasing either the outside diameter or the weight of the object will increase the moment of inertia. The larger the moment of inertia, the more power it takes to start or stop the object.

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. below is the Executive (spoke) style
RJC Executive Pulleys Installed 1RJC Executive Series Pulleys
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 6lbs. 2oz.
RJC Billet Aluminum Stock Style Crank Pulley no fan 1lb. 10oz.
RJC Billet Aluminum Race Style Crank Pulley Razor 1lb. 1oz.
RJC Billet Aluminum Race Style Crank Pulley Undersize 15oz.         

Factory Stock Steel Water Pump Pulley 1lb. 8oz.
Competitors Billet Aluminum Water Pump Pulley 8oz.
RJC Billet Aluminum Water Pump Pulley “Razor Style” 7oz.

Factory Stock Steel Power Steering Pump Pulley 1lb.
RJC Billet Aluminum Power Steering Pulley “Razor Style” 7oz.

Factory Stock Steel Idler Pulley 12oz.
RJC Billet Aluminum Pulley “Razor Style” with bearing 4oz.

Factory Stock Steel alternator Pully 7oz.
Competitors Billet Aluminum Alternator Pulley 3oz.
RJC Billet Aluminum Alternator Pulley “Razor Style” 2.3oz.
pulleys pulleys-installed-1

The “Razor” style is pictured above left pic to the left

The” Executive” style is pictured on the  above left pic right of pic

Right is the Limited Edition Executive two tone black and silver pulleys. these pictures do not do these justice

Both can be custom ordered in anodized black
for that “Stealth” look Black anodizing is +$30/set

8 Piece set includes;
Race or Stock Style Billet Aluminum Crank Pulley
Billet Aluminum Water Pump Pulley
Billet Power Steering Pulley
Billet Idler/tensioner pulley
Billet Billet Aluminum Alternator Pulley
Chrome Plated Aluminum Alternator Fan
Billet Aluminum Alternator Nut. (spike or Acorn style)
Billet fan to pulley spacer

Price 8pcs kit Razor (shown above left); $509.00

Price 8pcs kit Executive (shown above middle); $509.00

Price 8pcs kit Executive Limited Edition Black/silver shown right ; $549.00

WeightThese pictures show the weight of the aluminum race pulley. It weighs aprox. 1 lb 3 oz. This is 5 lbs lighter than the stock pulley without the intercooler fan and about 8 lb lighter than the stock pulley with the fan. That is quite a reduction in reciprocating weight. The two pictures on the bottom show the stock pulley with the weight of a stock pulley (right) without the intercooler fan. The intercooler fan weighs aprox 3lb more than this. (weight shows 6 lbs 2 oz.)


Return Policy

This warranty does not cover any failure due to abuse, accident, or neglect. The liability of the manufacturer shall not exceed the original purchase price of the unit. Read More..