Increasing CFM by adding a compressor.

by Dave
(Omaha)

Can you run two identical 5.3 CFM @ 90 PSI units to generate 10.6 CFM at the same PSI?

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Increasing CFM by adding a compressor.

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Jan 18, 2008
 Thanks
by: Dave

Hey guys thanks for the input. I picked up a small Porter Cable 3151 for $165 new from a sale. It works great, even with the grinder. It does run slower when the pump is running, but I'm happy so far. I know I'd like more CFM in the future, and I'd rather just buy another smaller compressor like the PC 3151, 7.7 @ 40 and 6.0 @ 90 is pretty good, and double sounds great. Especially if I don't have to run 220 to the garage, and run a huge compressor.

I plan on doing small jobs for now like basic maintenance, rotating tires, building small things etc, but in the future...I'll be restoring a car for the kids and I'm preparing now.

Thanks again.
Jan 18, 2008
 Check valves
by: Jim G

Yes, I think that you should use check valves to isolate the inputs.
Dec 21, 2007
 Increasing CFM
by: Anonymous

Greetings, Dave.

From my experience, you should have no problem doing so.

Both compressors would lead into the same air main, and it might be helpful to have that main lead into another receiver before pulling air to the application.

In the lines from each compressor, I would install a check valve that allows outflow only. That way, if one compressor is running behind on recharge, the other one's output won't flow into the other compressor's receiver.

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