6 or 5 inch ac pulley

[Awann99]

I need a new ac compressor. I noticed four seasons has two listed for our truck on rockauto. One with a 5.12 inch pulley and one with a 6 inch pulley. Has anyone had any luck with the 6 inch? I had issues getting the 5.12 to not slip when it was on.
Thanks.

[Steeveedee]

Are those both A6 compressors? The R4 compressors have larger pulleys. The only application I'm aware of for large diameter A6 compressor clutches was on the hot rod V-8s of the era, since the expectation is that the hot dog owners would be revving them higher.

[Awann99]

Yes they are both the new A6 style compressors.

[PbFut]

If it's slipping, find a different belt to bite better. The cog style work well on my 5 inch. No slip. Make sure no wax or grease on the grooves.

[Awann99]

Originally Posted by PbFut

If it's slipping, find a different belt to bite better. The cog style work well on my 5 inch. No slip. Make sure no wax or grease on the grooves.

What size belt did you end up using?

[PbFut]

Originally Posted by Awann99

What size belt did you end up using?

Goodyear 15565. Nice fit. Flat outside clogged inside.

[Steeveedee]

Originally Posted by Awann99

Yes they are both the new A6 style compressors.

Those compressors fit all applications of the era of GM vehicles, I think. I ought to start a poll about how many trucks had the large pulley. I'd bet on zero, tbh. But then I've seen things on these trucks that no one would ever expect.