i suck at trying to convert cfm's and what not.

i have this HF spray gun kit

[img]http://www.harborfreight.com/media/catalog/product/cache/1/image/370x/9df78eab33525d08d6e5fb8d27136e95/i/m/image_12134.jpg[img]

Operating pressure: 30-35 PSI (large gun), 25-30 PSI (small gun)
Air consumption: 12 CFM @ 43 PSI (large gun), 9 CFM @ 43 PSI (detail gun)


and i am looking at getting this compressor

http://www.harborfreight.com/2-horse...sor-68127.html
[img]http://www.harborfreight.com/media/catalog/product/cache/1/image/370x/9df78eab33525d08d6e5fb8d27136e95/i/m/image_19658.jpg[img]

Air delivery: 5.9 SCFM @ 90 PSI, 7.3 SCFM @ 40 PSI



this will be my first cat painting project. i am going to start with the bay, then door the doors and bumpers seperate. then ill do the frame and all the jams. just trying to figure if this compressor will be enough to run this gun.

 

That thing is gonna empty very fast.....i dont think that compressor can keep up.

 

If youre only doing little pieces at a time, you might be able to get away with it, but anything more its not gonna keep up.

 

X2 get a used compressor with a larger tank check craigslist you can pick up some good deals!

 

Get a used 220v compressor with a larger CFM output @40psi. Or get two separate 110v compressors and chain them together for higher output.

Oh, and don't be painting cats.

Alternatively: get an LVLP gun like the grizzly h7666:
http://www.amazon.com/Grizzly-H7666-...1765089&sr=8-1

 

i have an older Colman oilless compressor. can i chain the two tanks together or does both tanks need a motor.

 

You can chain the tanks but not the compressors unless the compressors have very similar specs. Depending on the size of the second tank, it may not even make any difference at all.

 

not everyone has 220 at home.

op if you are this unsure about a compressor choice how sure are you of your painting skills! lol

 

Gotta start somewhere right?^

 

exactly. i have never did any body or paint work, but i do want to start practicing. if i have the paint the car 6 times i am fine with it, just something i want to learn to do.

 

I would say find a place that you can rent a booth. Here in San Diego Ca they start at $55 and go to about $120 for 3 hours. more than enough to get the car painted. If you plan on doing more than one paint job invest in getting 220 in your garage and at least get a 60 gal compressor. if you get a compressor you still need an air dryer to keep the moisture out of your lines. That will instantly ruin your paintjob. Pm me I can give you the lowdown.

 

www.facebook.com/primerautobody

 

15 gallon compressor should do it for the spraygun for air tools at least 30 or a 20 but with a bit piston oil motor

 

a 15 gal is hardly efficient to fill tires...

op if you are serious find yourself a good used 30+ gallon and an inline dryer, car painting is no walk in the park but if you practice enough you should be alright keep reading up there are loads of information about compressor setups!

 

Guys guys guys, the gallon capacity has little to nothing to do with what tools you can use.... It's all about CFM output.

 

i been painting cars for 15 years if your going to paint a 1/4 panel a fender or any other piece it should be find, but if your doing mayor auto repair then you need a 50 gal and up. and if your doing backyard paint jobs 20 to 30 with and again with a big compressor motor you should be find, and i can prove it to you any time bro.....!!!!!

 

I'm telling you, size (in gallons) doesn't mean much, if anything. The tank is merely a "buffer".
1cfm = 7.48gpm (albeit, this is in terms of uncompressed air).

Therefore, to run a 4 CFM gun for 1 minutes off of just the tank, you need a 30 gallon tank. 4 CFM is miniscule for a gun and 30 gallons is pretty big for a compressor.

When compressing air to 130psi, one can fit much more than 1cfm per 8 gallons (I think one can fit about 40CFM in a 30 gallon tank at 130psi, which is more than most "home" compressors are capable of.) But keep in mind, this air is drained at a rate of x cfm @ 40PSI, not x cfm @ standard atmospheric pressure. There is some more math involved, but generally tanks are not capable of running guns for extended spray periods required for overall paint jobs.

I have no trouble running my 13CFM devilbiss off of my 8 gallon tank. You know why? My compressor puts out at least 14CFM at 40psi (8hp, gas powered.)

 

yea your right. i painted this car witha 15 gal craftsman compressor

 

btw it got stolen this saturday morning at south whittier ca. area

 

I'm finding it so hard to follow your line of reasoning at all. There is a forum for stolen cars, go post there. Once again, gallon size has little to nothing to do with what tools you can run.

 

fool you dont need to follow nothing, you do thing your way , i do things my way , let the people choose the advice they wan if they wan it

 

bty you wan to do a better paint job prep your car get all your materials and go to any public sprayboot rental they are about $20 dlls per hour, thas the way we do it here in south califas. i dont know how they do it in wester the goonies whatever it is

 

You need a car trailer and a truck to do this as well, since most cars ready for paint aren't even close to driveable... (I'd like to see what looks you'd get driving a car with no trim/windows, headlights or tail lights through california...)

Dude, it really isn't that hard. The capabilities of a compressor depends SOLELY upon CFM output. If you have a 100 gallon tank and a 2cfm compressor, it is pretty damn useless. The best thing a tank does it buy you some time between compressor cycles. It is just a buffer.

 

dude everything its around the corner in los angeles just have your license plate , your tail lights what dothey have like four nuts you can take those off in the booth no problem, and most compressors work with any gravety feed or hvlp spray guns you just wan to get to technical dude

 

How about if you REALLY do it properly and take the engine out so you can do the entire bay? Or take the doors off for a solid color job where you are painting the jams?

And type of gun has NOTHING to do with the conversation at all. Compressors will "work" with anything that needs compressed air (within the compressors ability to compress air, typically sub 150PSI for a single stage and much higher for a two-stage.) It is all about duty cycle for your tools.