lightweight pulleys

[vjettaw03]

ecs have the lighweight underive pulleys i'm wondering how good they run with a stage 3 on ur car thanks

[98a4]

In theory they should run just the same. They simply reduce the rotating mass of the pulleys freeing up horsepower elsewhere... I don't see why the stg3 would affect it..

[mk-4gasm]

i know when i put my pulleys on with my supercharger they took about 1 pound of boost away but that is because they are on the same belt as the super charger pulley... i think -having a stage 3 turbo would not later their effect

[GTI20thAEinDE]

Yeah, they should have no side ffects with the stage 3. It's the same as adding an exhaust, and then adding a stage 3 kit, the exhaust will still work the same. The underdrive pulleys are based on the fact that there is less rotating mass so they can turn easier however, they will underdrive your a/c and alternator somewhere around 25% if you get the full kit. You can also get just a lightened crank pulley which will not underdrive the a/c and alternator.