How big a motor do I need to run this compressor?

[darwyn]

I inherited a Quincy compressor head from my father. It has a tag on it that reads
model 308 22
295616S
SIZE 3 & 1 3/4x2 1/2

where the & is some symbol I can't identify. I have managed to figure out that it was built in the 50's. The question is what size motor do I need to run it?

 

[oldschoolrides]

I would say 5hp 240v motor

 

[930dreamer]

Look at this thread

http://www.garagejournal.com/forum/showthread.php?t=84883

 

[darwyn]

Look at this thread

http://www.garagejournal.com/forum/showthread.php?t=84883

Actually I had, he says he is running a 3 horse, of course his wasn't working either

 

[zkling]

Depends on the output you gear it for. IIRC they are a ~2-3hp unit. Call quincy and ask them for a performance curve for that unit. It will have charts of output at specific RPM and HP needed to achieve that RPM. 5hp should be overkill, that is more 325 territory.