4.0 Crank Pulley Diameter

[ROKRWLR]

Could someone measure their 4.0 crank pulley for me? I need the diameter of the part the belt rides on, not the thicker part.

I forgot to measure mine before I got rid of the old motor and am trying to decide which pulley to put on my swapped motor to not overspin my pump, but spin it faster than the stock LS pulley.

Thanks!

 

[Hypoid]

Measured one on a '98: 20-9/16"

 

[ROKRWLR]

Measured one on a '98: 20-9/16"

Is that a typo? 20" would be one hell of a pulley!
It should be in the 6-7" range. The balancer pulley on the crank.

 

[old_man]

Sounds like the circumference.
20.562 / 3.14159 = 6.54"

 

[Hypoid]

Sounds like the circumference.
20.562 / 3.14159 = 6.54"

Yup, circumference. :confused1

 

[UnlimitedMatt]

Sounds like the circumference.
20.562 / 3.14159 = 6.54"

Mmmmmm, pie.

 

[ROKRWLR]

6.5 sounds much better. I though maybe this is a new thing the kids are doing these days. Rolling on dubs for the harmonic balancer!


Thanks Guys.