underdrive crank pulley need help

[crazybeast895.0]

my friend just gave me a crank pulley and i want to get it on the car does any body know what size belt i would need i still have ac ......thanks

 

[Roland69]

just a U/D crank pully is not worth any power gains...maby 1-2 RWHP. I would just go to a NAPA and ask them for the part number for your replacement belt and tell them you want the next size smaller. The part number has the size in it so if yours was say a 25-60-845 I would ask for a 25-60-840 or 20-60-835.
I could look up your part number right now if you like and you could try the next size smaller if you want

 

[Roland69]

a goodyear gatorback belt for your car would be part number GTR-4060872

the 60 means 6 rib
the 872 means 87.2 inches (or 87.25)

so I would see approx how much shorter you need and try and get a part number to match. Maby a GTR-4060850 or around that neibourhood

 

[crazybeast895.0]

yeah ill do that thanx for the help guys