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Old 04-05-2004, 07:13 PM
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air compressor question

I was just wondering if i would be able to spray my car lets say at 40 psi, cause ive found compressor and it says 11.+ cfm at 40psi, 6.+ at 90 so if i set it at 40...would i be able to work on car, need to get quarters off and paint it. anyone know where i can get compressor under $200-$300 that will do job.

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Old 04-05-2004, 07:20 PM
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There are few things worse than running out of air in the middle of a paint job. I would not put much faith in a $200 or $300 compressor.

Vince
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Old 04-05-2004, 10:01 PM
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You can get Husky 60 gallon single stage compressor from Home Depot for $399. You CAN paint a car with it, many have. If you want a compressor to do it all, an 80 gallon 7HP for $799 is the minimum. Remember, if you open an account card with Home Depot, you ca do zero interest, zero payment for 6 months for over $299.
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Old 04-05-2004, 11:22 PM
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is that 220v compressor? another thing im looking for is 120v, i cant get 220v circuit
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Old 04-06-2004, 12:18 AM
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darn, i got a 60 7hp compressor thinking it would stand up to painting, but i guess not.

why such a big compressor, if your regulated why does it matter?
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Old 04-06-2004, 04:54 AM
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You don't need 7hp to paint a car. That 7hp rating is probably peak hp and is a meaningless measurement of hp. A compressor with an honest 3hp rating is more than sufficient. A 120v circuit is limiting your selection though. You can't run much hp on a 120v circuit.

A single phase 2hp motor on 115v volts pulls 24 amps full load curent. On 230v that drops to 12 amps.

A 115v circuit would need #10 awg wire to deliver 24 amps for a 2hp motor. At 230v all you need is #14 awg.

In addition, a 7.5hp motor on 230v requires #8 wiring and will pull 40 amps.

Vince

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Old 04-06-2004, 12:49 PM
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ya i know, ive heard that i can get away with about 4hp compressor, as long as i have like 20+ gallon tank. and im gonna return it probably so i wont keep it for long, so its ok if its not big enough.
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Old 04-06-2004, 02:50 PM
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What my instructor said...

Well, according to my autobody instructor (he has been in the business for over 30 years) he says if you need to paint an entire car and need to do it in one shot you need to be at around 20cfm@90psi.

That is due to the HVLP paint guns that are out today. They are supposidly comming out with some LVLP guns soon and that should allow for the lower end "home" compressors to be used to paint an entire car.

That is what he said to use for best paint application environment.
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Old 04-06-2004, 02:53 PM
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Re: What my instructor said...

Quote:
Originally posted by muscarmad
Well, according to my autobody instructor (he has been in the business for over 30 years) he says if you need to paint an entire car and need to do it in one shot you need to be at around 20cfm@90psi.

That is due to the HVLP paint guns that are out today. They are supposidly comming out with some LVLP guns soon and that should allow for the lower end "home" compressors to be used to paint an entire car.

That is what he said to use for best paint application environment.
what? why 20@90, you don't paint at 90psi...
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Old 04-06-2004, 03:48 PM
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my instructor said ~11cfm is good enough
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Old 04-06-2004, 04:01 PM
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20cfm@90 psi is way out of the ballpark. You could sandblast all day long with that kind of capacity.

Vince
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Old 04-06-2004, 04:14 PM
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i painted my monte carlo at home with a 30 gallon 110 volt compressor with out a problem.. planning on doing it agian this week (accident).
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Old 04-06-2004, 05:12 PM
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what kind of cfm and at what psi do most hvlp guns use?

arn't they like 20-40 psi? and under 10cfm?

if so a compressor that puts out a continous 10cfm at 40psi should work perfect right?
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Old 04-07-2004, 03:18 PM
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http://www.harborfreight.com/cpi/cta...emnumber=47065

i was thinking about getting this one for temporary work, then ill return it after im done working on my Charger

or maybe one from this site, they sell tools for cheap
http://www.homier.com/default.asp?pa...ies.asp?dept=1

Last edited by mitmaks; 04-07-2004 at 03:18 PM.
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Old 04-07-2004, 03:20 PM
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why are you trying to cheat the system by returning it after you use it for your job
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