Fan belt part# w/Mac pullies?

[BYRDPE]

Anyone know what size belt is needed with the Mac UD pullies?
Or if you can provide the stock belt part number I can possibly get one 3-4 inches shorter.

Thanks

 

[JChalfan]

ttt

I always thought underdrive pullies used the stock belt length. Anyone?

Jeff

 

[srothfuss]

I was running:

BBK steel UD's
1 7/8" overdriven FFI alt pulley (3G alt)

and needed a belt that was 1" shorter than stock. You can go to places like Napaonline.com or autozone to get the last digits of any belt part number (stock lenght) Then use these to get a shorter belt lenght that fits your car.

 

[8950HO]

ttt

I always thought underdrive pullies used the stock belt length. Anyone?

Jeff

That`s if you use all three,including the larger alternator pulley.
It won`t charge worth a crap at idle with the larger alternator pulley with underdrives though,especially with a 2g alternator.