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a quick question for those who have painted cars

 
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popballz
Member


Joined: 18 Nov 2007
Posts: 533
Location: Tacoma, WA

1989 Pontiac Firebird

PostPosted: Thu Oct 29, 2009 12:18 pm    Post subject: a quick question for those who have painted cars Reply with quote

what were the specs on your compressor?

I read on autobody101.com that 15 CFM would be ideal but I want to know personal experiences with it.
(hvlp guns need like 10 and your suppose to have 1.5 times that)

but the best one I could find without spending too much was 8.7 CFM at 40 psi.

I can not justify buying an super expensive compressor to fix a few dents.

I just looked at this one too, its 8.8 CFM at 40 psi, but its from harbor freight
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=93271

thanks Very Happy
(also what guns you used would be great!!)

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91camaro_rs
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Joined: 03 Dec 2008
Posts: 1712
Location: Fox Island, Wa

1991 Chevrolet Camaro RS

PostPosted: Thu Oct 29, 2009 12:35 pm    Post subject: Reply with quote

just do what i did, go to LDI get the paint matched and rattle can it, it looks great and is cheap
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'91 Camaro RS 5.7 TPI- 700r4- 3.27 posi- headers- chambered exhaust-
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chevymad
Master B


Joined: 11 Jan 2004
Posts: 5476


1987 Pontiac Formula

PostPosted: Thu Oct 29, 2009 4:29 pm    Post subject: Reply with quote

One thing to consider is that the gun is rated as if you pulled the trigger and just held it. When you're actually painting, its on, sweep, off, sweep.. so it doesnt quite use the full cfm. I have what used to be considered a 5hp with a 33 gallon tank and though it runs a DA it has to run all the time. The DA is the most air consuming tool I have. A few years ago the hp ratings were down rated. . so my 5hp may be like 3.5? Not really sure. One thing I will recommend is not to buy an oil less air compressor. In general they're more noisey, and the diaphrams eventually wear out.

If you plan on doing alot of car work in the future buy the most compressor you can afford. I really need a bigger one myself, but can't complain about this craftsman. Its been 15 years and probably 6 or 7 paint jobs.. and still working.
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91RSVert
Member


Joined: 16 May 2007
Posts: 2736
Location: AR

1991 Chevrolet Camaro RS

PostPosted: Thu Oct 29, 2009 7:43 pm    Post subject: Reply with quote

I dont know how many cfm my comp. pushes, but its not enough for a sand blaster.

I have used suction and hvlp. I spray at 35psi unless I'm trying to color match.

I know using gun and other power tools, the comp seems to cycle about the same rate as impact, ratchet, sheers. Die grinder or da make it cycle more.
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83Z28BlackBetty
Bam-Ba-Lam


Joined: 13 Mar 2006
Posts: 2083
Location: Aloha

1983 Chevrolet Camaro Z/28

PostPosted: Fri Oct 30, 2009 8:45 am    Post subject: Reply with quote

i used a binks gun (can't remember the model) and a 135psi 50 gallon compressor (dialed down the psi of course)

be sure to use a water trap in the line to keep the moisture from ruining the paint as you spray.

~JAKE

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1983 Z-28 5.7 LT1, T56, Headman headers, BW 9 Bolt Posi Disc, WS6 suspension
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91RSVert
Member


Joined: 16 May 2007
Posts: 2736
Location: AR

1991 Chevrolet Camaro RS

PostPosted: Fri Oct 30, 2009 9:22 am    Post subject: Reply with quote

possibly 2 or 3 water traps.

If the air hose ever had an inline oiler on it, get a new hose.
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