Crankshaft Pulley Sizes

[James_Douglas]

Hi All,

 

Has anyone used something other then the 5 inch (measured in the base of the pulley v groove) standard pulley and had it clear the cutout in the front frame or not drop when the engine gets a good bounce?

I have one that is 7 inch (OD, probably 6-1/4 at the base)  off of my "combine" 265 engine and before I pull the radiator on the '47 Desoto to see if it will clear for the new rebuild...I thought I would ask if anyone has gotten a larger one that would clear...in particular with a Desoto or a Chrysler frame.

 

Thanks all, James.

Edited February 23, 2020 by James_Douglas

[Doug&Deb]

Does your stock pulley have a flat on one side? I’m not familiar with the DeSoto setup. On the D24 I used to have if I didn’t index that flat properly getting the belt off was almost impossible. Just out of curiosity what is the advantage of a larger diameter pulley?

[Sniper]

A larger diameter crankshaft pulley will drive the water pump and alternator/generator faster.  Assuming you don't change those pullets too.