# speedaire compressor cfm unknown

by BJ

Is there a way I can roughly calculate the output. It is a reciprocating type V piston arrangement twin cylinder. I can't find the specs for it and am determining whether it is better as a boat anchor or what.

As for repairs, what? I am familiar with motorcycle engines and have pulled the heads on this unit and the flap valves "seem tight" and rust free....no scores in the cylinders and no visible wall wear. Just seems to take a lot longer to fill up the 20g tank(than it use to. Air filter is clean and free flowing and lines are (soap tested) tight and head seal externally is tight (soap tested).

### Comments for speedaire compressor cfm unknown

 Jun 20, 2013 CFM by: Cesar Delgado I would like to thank you Terry for the formula to obtain the CFM of my unknown compressor. You are awasome!Sincerely,Cesar DelgadoEl Paso Tx.

 Dec 18, 2007 Speedaire Compressor by: Bill - Publisher Tough question, BJ. You don't indicate the horsepower of the motor, and that might help. Industry standards suggest that for motors over 10 HP, each HP will generate about 4 CFM of compressed air at 90 PSI. I know that this changes substantially when the motor HP is less than 10. I've also read that using a figure of about 2.2 CFM of air discharge for each horsepower for a compressor under 10 horsepower is common. That source didn't say at what pressure that flow rate was achieved. I've never been able to "nail down" a specific formula for determining the discharge rate of a specific compressor, mostly, I think, as there are so many variables. A host of different manufacturers, different piston sizes for different compressors with the same electric motor horsepower, different belt to sheave ratios and so on. At this point, as noted, over 10 HP I use 4 CFM @ 90 PSI, and under 10 HP I go with 2 CFM per horsepower at around 90 PSI. If someone has a formula to offer us, that would be great. Cheers, Bill

## Speedaire Compressor

by Dmitry

Hi-

I am working on feasibility study project and would like to know the age of existing Speedaire compressor and approximately the average life span of this compressor. The Model # is 1wD49 and serial number is R0010950

Thanks

Dmitry

Hello Dmitry:

Regarding the age and average life span of any compressor, that information would have to come from the manufacturer themselves.

I don't represent any compressor manufacturers now, and certainly don't have any inside information on your Speedaire Model 1wD49.

Like yourself, I expect, I used a search engine to try to find details on the manufacturer of Speedaire, with no success. Perhaps you could find a retailer, and through them, find the manufacturer, and contact them directly with your questions.

Failing that, anyone else out there have any information on this type of compressor?

Cheers,

Bill