Any1 using aluminum pulleys? Is it worth to upgrade them?
I have used alu pulley's on my old 705.
I find the regular composit pulley's more smooth then the alu one's if threated with runnertime free.
I spraid some runnertime free in a cup, and then put the pulley's in so they get fulley oiled.
I did the same with the belts, and the result is a extremely smooth drive train.
The alu pulley's are more heavy, and therefore not very usefull on the car.
You want to be the rotating mass as low as possible, so you can better stick with the composite one's.
Try runnertimme free!
I'm sure you won't get dissapointed.