are 112 pulleys the same pulleys that are ran on the 122? i have a 112 3.2 pulley and want to make sure it will work on my 122 before i go though the hastle.


also does anyone know the belt size for a 3.2 pulley?

 

Pulley size -Belt Size -Boost psi.(apx.) - Goodyear# - Gates#
2.75" Pulley = 111.0 " Belt = 9 to 10 psi. - P/N=4061110 - P/N=K061110
2.8" Pulley = 111.0 " Belt = 8.5 to 9 psi - P/N=4061110 - P/N=K061110
2.9" Pulley = 111.5 " Belt = 7.5 to 8 psi. - P/N=4061115 - P/N=K061115
3.0" Pulley = 111.5 " Belt = 7.0-7.5 psi. - P/N=4061115 - P/N=K061115
3.1" Pulley = 112.0 " Belt = ---6--- psi. - P/N=4061120 - P/N=K061120
3.3" Pulley = 112.0 " Belt = 5 to 6.5 psi. - P/N = 4061120 - P/N=K061120

 

Those boost numbers seem low. What are the boost numbers for? A 112 or 122, 6.0 or 5.3, long tubes or stock manifolds?

 

depends on if you have jackshaft, and if the rear is over driven or underdriven. the belt size thing should eb right but im speaking of psi

 

I believe the 112 and 122 are both nose drive for gm truck/suv applications (save SSR & H3)

 

i don't think they are the same pulleys? 112 vs 122, not sure tho.

 

anyone else know if they are interchangeable?

 

yes...

 

Those numbers are for a 6.0L with an MP112.