Swap compressor pump to older one or not?

[bagged89s10]

I have a newer husky 30 gallon air compressor. I also have an old Campbell hausfeld air compressor pump from an old Sears air compressor that seems to have higher scfm. Is it worth swapping this pump or should I just sell the compressor and buy a bigger one?

 

[The Cobbler]

you will need to change pulley on motor since the Husky is v belt, keep the rpm the same.
do you need more CFM? why not run the sears in conjunction when you need more air?

 

[u2slow]

IMHO, its not worth the swap for the marginal extra cfm.

If you want to try something cool, setup both comps to run switch-hit style, or staged cut-in, on common tanks. That way both machines can contribute to your usage without one being overworked. I'm looking at doing this... with my 10cfm portable 20gal and 6cfm stationary 30gal.

 

[toplessHO]

those ole Speedaires were like tanks,but Ive had some pit around the valve seats in our humid environment.

 

[bagged89s10]

IMHO, its not worth the swap for the marginal extra cfm.

If you want to try something cool, setup both comps to run switch-hit style, or staged cut-in, on common tanks. That way both machines can contribute to your usage without one being overworked. I'm looking at doing this... with my 10cfm portable 20gal and 6cfm stationary 30gal.

That might be a good idea.

 

[redmondjp]

IMHO, its not worth the swap for the marginal extra cfm.

If you want to try something cool, setup both comps to run switch-hit style, or staged cut-in, on common tanks. That way both machines can contribute to your usage without one being overworked. I'm looking at doing this... with my 10cfm portable 20gal and 6cfm stationary 30gal.

^ This.

If you swap out the pumps, you won't even notice the difference. You likely don't have a big enough motor to get more flow out of that other pump anyways - that is really your limitation with the existing compressor.

The manufacturers don't give you any extra motor HP to work with on that size compressor (more copper is $). Heck, even Big Red Air (who makes some compressors for Snapon) had Baldor special-wind a "7HP" motor - not the standard NEMA size of 7.5HP - in order to reduce the cost of their unit. And that's on a compressor that retails for close to $4K (but is really about a $2500 unit when comparison shopping).

 

[bagged89s10]

^ This.

If you swap out the pumps, you won't even notice the difference. You likely don't have a big enough motor to get more flow out of that other pump anyways - that is really your limitation with the existing compressor.

The manufacturers don't give you any extra motor HP to work with on that size compressor (more copper is $). Heck, even Big Red Air (who makes some compressors for Snapon) had Baldor special-wind a "7HP" motor - not the standard NEMA size of 7.5HP - in order to reduce the cost of their unit. And that's on a compressor that retails for close to $4K (but is really about a $2500 unit when comparison shopping).

I probably have a larger motor sitting around but looks like I’m better off selling this old pump and I’ll just buy a larger compressor with 60gal tank.