Alternator Pulley

For F-body or LS Truck Alternators  Standard LS belt cut Available in multiple sizes CNC Machined from 6061 Aluminum then anodized and engraved Made in the USA      Truck Balancer diameter is 7.53" (it’s the biggest Balancer) In one rotation it uses 23.65 Inches of Belt 2.03 Pulley uses 6.38 2.25 Pulley uses 7.09 2.75 Pulley uses 8.64 3.00 Pulley uses 9.42 3.50 Pulley uses 11.00 3.75 Pulley uses 11.78 Divide the 23.65 by Your Pulleys number above to get your Ratio example for a 3.00 Pulley    ---->      23.65 divded by 9.42 equals  2.51 Once you know your Ratio Multiply that by your Maximum RPM to calculate how Fast Your Alternator will be Spinning. RPM—-6000—7000—8000—9000 2.03 pulley ratio is 3.74 ——22440--26180--29920--33600 2.25 pulley ratio is 3.35 ——20100--23450--26800--30150 2.75 pulley ratio is 2.74 ——16440--19180--21920--24660 3.00 pulley ratio is 2.51 ——15000--17570--20080--22590 3.50 pulley ratio is 2.15 ——12900--15050--17200--19350 3.75 pulley ratio is 2.00 ——12000--1400