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Topic Review (Newest First)
08-25-2004 12:09 PM
my compressor

My air compressor is quiet! It consists of a (old) Speedaire tank, a (very old) 3/4HP or so Westinghouse motor, and a (old)"Made in the United States of America" compressor, which was part of a refridgeration unit back in the day. For the air inlet it's a ~2" steel pipe that sticks out about 8" and has a flat square air filter; sort of like what's on a B&S engine. There's a Square D box on it that has no controls, but I think that is some sort of inverter or transformer. Everything on it was made and assembled in the US.


The only bad thing is it only pumps to 80 PSI. And it's heavy as hell, but it has wheels. I'd like to get about 120PSI out of it, how'd ya do it?
08-23-2004 10:02 PM
Old School Nut i got a compresser in my garage. 6.5 HP huskey brand 60 gal belt drive, mounted on a 1 inch thick rubber mat with HUGE washers under the feet.. to me compressers dont seam loud, i dunno, guess i am used to it, it does scare my friends tho when she starts up, so i guess some people call it loud, i dont even notice it.
08-22-2004 06:57 PM
babe_n_indy Get yourself a really good pair of ear plugs!
08-22-2004 09:11 AM
Originally posted by Huskinhano
If you don't already have a compressor, I HIGHLY recomend that you don't buy a oil free unit! They are absolutely brutal with noise. Buy ear protection is my advice in general.
I agree, spend the extra bucks for a belt driven one unless you have a place to isolated it. Those oil less direct drive compressers should be outlawed for the noise level they produce.
08-22-2004 03:35 AM
Metal Shavinks in the Kompressor

The right amount of metal shavings in the kompressor is in proportion to the price, ignorance and quality control of the dog terd factory it was made in.

They don't carefully hand build things - with great attention to detail and do things like blowing swarf out of the threaded holes etc.. for kompressors that not infrequently get treated like crap, and are poorly serviced and run into the ground.

I mean like here in Straya, you can buy Chinese kompressors for $130 that are seemingly good and decent units (untill some use is put on them and the flaws start to become obvious) - complete with badly laid out couplings, stupid drains, crap sealing in the connecting pipes and poor oil control on the piston (scraper rings ??? what are they??) etc.....

I spose you could look at it as an investment, in that you got more for your money than you bargained for.

You got some extra metal in the unit for free - kind of like a fly in your soup.
08-22-2004 03:21 AM
Dubz mine is sitting on wood blocks bolted to the feet, will have to try the rubber idea and also see about making a box for it.

would i still need a box if i make a makeshift paintbooth as in the knowledge base?

may have to try the synthetic later on, but i'm changing it every couple months lately as i'm working the compressor more than i should.

How much metal shavings is normal in the oil of the compressor anyway?
08-21-2004 01:29 PM
Noiseless Kompressing

In my kitchen..........

Hmmm I made up a work bench that has everything slot into it, - tool boxs, welder, Kompressor underneath and a drill press and lathe on top

Having the kompressor sitting on a bit of thick carpet and a basic angle iron housing over it, soaks up lots of noise.

If I wanted to run my Kompressor at 3 am, I could simply seal up the housing around it with some heavy carpet off cuts, leaving a fair slot at the bottom and top for ventilation.. and I'd imagine that as far as soaking up accousting energy, that this would work very well.....

Yeah unless switches and electrical stuff are rated for explosive atmospheres.... either don't use them or put the kompressor outside, in a nice little well vented sheet metal / plywood box, internally clad with thick carpet...

Actually for your information, there is a type of compressor that is noiseless.

It's in the same department as silent hammers and air guitars at Kmart.
08-21-2004 11:42 AM
Re: Cheapest & easiest method

Originally posted by Boogie Woogie
I refilled my vertical 80 gal 5 hp 2 stage compressor with Amsoil synthetic 40w compressor oil. Starts quicker when cold & cut the sound by more than 50%. You can actually have a conversation beside it. Good luck!
Very interesting. Sounds like the same compressor I'm using. I've been thinking about changing the oil in both the 80 and the 30 gal I have. Thanks for the tip.

08-21-2004 11:07 AM

Don't put your compressor outside, depending on the relative-humidity and time of day, all you'll be doing is pumping water through your lines.

The best thing you can do is what I did, I actually put the compressor inside my HOUSE... in it's own little room with some foam on the walls and rubber under the feet, but the doorway has cutouts for two 20"x20" furnace-filters.

Sure, it's louder for those in the house, but it's quiet outside, and it's quiet in the garage. Plus, the compressor gets a constant supply of cool and dry air.

Note: you'll need a forgiving wife.


Oh, almost forgot... I ran a 1hp roll-around comressor once a few years ago on an Olds Cutlass I was redoing the trunk on...

I had the compressor about 5-feet from where I was shooting (wasn't shooting much, so I didn't worry about the comressor). BAD MOVE having it in the garage with you while you paint... the thinner in the paint ended up dissolving the insulation on the motor's windings...

Fortunately for me, it threw the 30-amp breaker before blasting everything in the garage. Hope it helps!

08-21-2004 10:03 AM
fourbyfourblazer I use to build aluminum inclosures for movie generators. We used 1/16 aluminum, sprayed the inside with sound proofing, foam insulation with acoustic vinyl barrier and then covered with inch thick felt. Felt works pretty good by itself. Sound baffles added and actuators for opening intake and exhaust vents. You could bolt huge rubber mounts to the floor. We could quiet a 8.3 Cummins Turbo to 50dBs at 100ft while under load. You could barely hear any thing.
08-20-2004 11:52 PM
2oldster I did a little work for a guy at his shop once that had a good answer to compressor noise. He had a fairly high ceiling so he built a stand to mount his compressor as high as he could. He could easily reach under it to drain it and it seemed to put almost all of the noise above head high. I wish my shop was as quite.........
08-20-2004 08:27 PM
Boogie Woogie
Cheapest & easiest method

I refilled my vertical 80 gal 5 hp 2 stage compressor with Amsoil synthetic 40w compressor oil. Starts quicker when cold & cut the sound by more than 50%. You can actually have a conversation beside it. Good luck!
08-20-2004 06:38 PM
no oilless

As someone mentioned not get an oilless compressor! They are just too freakin' loud! I got rid of mine and bought a 6 hp oil lubed from Sears that runs on 110. It is probably 50 % quieter than my old one. It has a aluminum pump which is a little louder that one with a cast iron pump but still not bad.
08-20-2004 04:02 PM
Compressor Noise

Put the compressor outside. I've never had one that close while painting but I wonder if exhaust of compressor might have an effect on the paint. --------Keith
08-20-2004 02:25 PM
Garage Detailer If your compressor doesn't have them, rubber isolation feet under the bottom of the compressor also helps to reduce noise. I use the interlocking fatigue mats found at Costco or Checker Auto under my portable unit.

Coleman Powermate offers the 20 gallon, 5HP POWERBENCH Air Compressor. It's essentially a mobile workbench on wheels with air compressor and tool storage below. The compressor is fully enclosed and claimed to be quiet. I never personally heard one though.

Here's some more specs:

CFM @ 40 PSI 7.1
CFM @ 90 PSI 5.7
VOLTAGE/AMPS 120 / 230

Perhaps it will stir some ideas for your own compressor cart.
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