Ericdrivesrx-7

What does it do? I saw the rotor dual alternator pulleys but if they do little or nothing, why bother!

Lodivigo

They allow you to run 2 belts around the water pump when you remove the air pump and it's belt.

ra ra rotory

when you have an airpump on, that means there are 2 belts going to the wanter pump, so the belt wont slip, thus not turning the water pump and eventully over heating....... the dual alt pully makes 2 belts come of the altinator so the water pump doesnt slip at high rpms... a must when you remove your air pump..... so they do alot if you dont have an airpump, otherwise... yeah ya get it? and i hate to say it but search dude

BDoty311

I dont have dual alt pulleys or airpump and my car never overheats. its been like that for awhile.

marcus219

just a safety thing..helps with water pump cavitation too..no air pump for me..just one belt on w-pump...everything works fine.

cagefreak

someone please help me . . . https://www.rx7club.com/forum/showth...hreadid=170706

gsracer

what size belt does the alternator pulley use?

ZenkiFC3S

Yeah, I have the Knight Sports dual pulley (came on the car) and one of the belts touches slightly and makes a constant whining sound, does anybody know what size belt is right for boht the front and back. Thanks

dr0x

They are both the same. Tighten your alt...

Juan

iTrader: (28)

Normal driving and drag racing wont make it slip. It slips when youre at high RPMS for longer periods of time. My old FC had 1 belt on, the car would start heating up and I could hear the belt slipping while roadracing. After the 2nd belt was put on, the temp went down and the belts didnt slip anymore.

BDoty311

This is true, i was just clearing up the statement made that says it is a must to run a duel alt pulley if you have removed the airpump, while it is not manditory. The only reason I would run it on my car would be for safety reasons, ie if that one belt snapped I would have a backup to run the waterpump.

SoRRoW