Re: "Special" items when converting to 12 volt?

Posted by HH56 On 2008/8/28 14:58:14

Dual pulley is just a single pulley with 2 grooves for 2 belts. It is driven off crankshaft and turns ALL the time but just freewheels. So for this application since the alt. is using the other groove, it will turn all the time the engine is running. When AC is turned on or when thermostat is cycling to regulate temp, the clutch magnetically engages the compressor crankshaft to the pulley but alternator is being driven before that action. Am not sure on a fully charged battery how much extra load the alternator will be. It will be turning but not being called on for much output--until the AC on & fan is on high, then that will pull approx 20-30amps.