broncobowsher
Contributor
I think you are correct.
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It runs, builds pressure, cut in and cut out are good. But it seems "slow". Anyone have any good ideas on how to test the CFM and compare to the rated output? Its supposedly 5cfm but my guess is its pumping about 3
Negative on 10cfmif it's on a tank, just time it to fill the tank. i.e. an 80g tank is 10.69cf, 100psi=6.9bar, so 74cf at 100psi. Time how long it takes to get there and you get cfm.
If it's a 3hp motor though, it should be doing 10-12cfm though...
Negative on 10cfm
Free air is close to 10cfm IIRC
5cfm on the plate. This isnt exactly it but close
Eagle P3120H1-CC 3-HP 20-Gallon Belt Drive Cast-Iron Air Compressor
So it says 12cfm on the plate but I have seen almost this exact model from a company in California advertised as 5cfm / 12cfm FA. So I think that's the difference.
But its only drawing 17 amps at 120V so its not a true 3hp either
Current output is 3cfm, which isnt terrible considering it was built in 1989. Now if I could only refind that company in the LA area that seemed to be the original manufacturer. This one is rebranded "acme" from a now defunct company in TN
Hard to tell how grungy it is. I might just replace it. I'm kind of getting sick of putting money into this auction find.good luck, but the general rule is 3cfm/hp at 90psi for smaller pumps and up to 4cfm on big pumps. Out of curiosity have you tried removing the intake filter and checking it there?
Hard to tell how grungy it is. I might just replace it. I'm kind of getting sick of putting money into this auction find.