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  #11  
Old 09-26-2017, 03:13 AM
War Horse War Horse is offline
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Default Bigger is Better

Have debated couple days adding my 2 cents worth, buy the biggest compressor you can afford, preferably with slow rev motor and cast iron pump and large tank, if you can run 3ph go nothing under 25 cfm if not using every day.

Running a small compressor that is often over rated and many cheap air tools need far more air than they claim, A small compressor has to run non stop when using, and often you have to wait for it to build up preasure, which frustrates you, they run at higher rpm, and have to start under load more often and most of the later combined motor compressor units have alunimum bores and if working close by the noise the make drives you nuts.
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  #12  
Old 09-26-2017, 01:36 PM
cvairwerks cvairwerks is offline
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Something to remember to look at on non commercial type units, is duty cycle. The lower the %, at the pressure and flow rate you need, the harder you are working the unit and the shorter it's life will be.

If you can find a unit that offers the ability to run in both start/stop and unloader mode, it will make your shop life much better. For low usage, you can run it in start/stop mode and have more quiet time in the shop. If you are doing something with heavy air needs, you flip it to unloader mode and when it's not required to make air, it's still running, but the compressor is essentially just being rotated. When the call for more air is made, it begins to make pressure within less time that in start/stop mode and doesn't have the big starting power surge. That is a huge help if you are a big enough power user to be on a demand metering system.
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  #13  
Old 10-01-2017, 10:11 AM
sblack sblack is offline
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You will never be frustrated by having a compressor that is too big!
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  #14  
Old 10-02-2017, 03:18 PM
clanger clanger is offline
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Rebuild what you have.

As others have said...... the older ones tend to be better. 5 hp should produce more than you need.

Most likely cause is the flappy valves in the head are a bit gummed up, and bypassing. Just need cleaning. Wont cost you anything.

Retest before any major strip down to do the piston rings.

G
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  #15  
Old 10-02-2017, 04:11 PM
crystallographic crystallographic is offline
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Quote:
Originally Posted by clanger View Post
Rebuild what you have.

As others have said...... the older ones tend to be better. 5 hp should produce more than you need.

Most likely cause is the flappy valves in the head are a bit gummed up, and bypassing. Just need cleaning. Wont cost you anything.

Retest before any major strip down to do the piston rings.

G

Good tip
on cleaning off the flappy valves first, before going for a ring job ...
Thanks.

(Usually after cleaning them I will freshen up the "air filter" component = adding some felt or foam over the intakes, somehow.)
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