under drive pulley's

[sting5841]

who has both the underdrive crank pulley and alternator

pulley with electric fans?????

I'm wondering how well this all works togather

does your system charge ok or what

please let me know

[99Silver6.0]

I havent put mine on yet. Im not gonna run the alternator OD pulley. I talked with the guy that runs Raging Motorsports and he got 13hp out of the crank UD pulley alone. The accessories are actually turning a tad faster than they need to be. So underdriving them wont hurt anything. Get a new pulley bolt too part# 12557840.

[1BADHD]

who has both the underdrive crank pulley and alternator

pulley with electric fans?????

I'm wondering how well this all works togather

does your system charge ok or what

please let me know

If your running nothing else besides fans, you will be OK. But your lights will still dim at idle. If you get the ASP pulley you will need to up yor idle speed. I upped mine to 700 rpm, it helps to keep charge at idle. I ended up geting a 180 amp alt. when it was all said and done.