'68 Coronet R/T wrote:Ryan,
The volume of the air (Cubic Feet per Minute) is what is critical not the PSI. You can pressurize a small amount of air to 125 psi but once you open the valve that small amount of air escapes so quickly that what little volume (quantity) of air you had is gone.
Your compressor should state on it somewhere what the CFM output is at say 40 psi.
Mooch wrote:Compressor is a $99 3HP 21Gal Harbor Freght unit
I told you in the very beginning it was your compressor. You just can't spray with that compressor .
I don't know crap about body work but pretty good at math. The epoxy, 2k, and Base all went on great. Even my last 2 passes of clear went fairly well. I just blocked it with 400 wet, someone good at sanding and buffing could probably make it look great how it is now As it is I want to lay down down two more coats. Gun issue has nothing to do the compressor. Doesn't matter how big the motor on the compressor is, turn it up to 120psi and cut off the compressor and pull the trigger for couple seconds to test gun, 120 is 120. My issue was after that in the valves/lines/gun. My regulator on the tank was so restrive how it was setup up I could set the gun at 80psi and only get 21psi out, open the valve up now and I'd pass 21 psi with the regulator set at 35psi or so. Big restriction there. I understand now that SPI Universal is a high solids 52%? clear and they recommend it put on really heavy and Barry was recommending trying upwards of 26psi at the gun instead of 19-21psi I was experimenting with. I think my problems are more that I could put the other products on wth multiple lighter passes and that is not working with the clear. I'm pretty sure I'm the problem not the compressor. A pro who is on the trigger 95% of time has a higher air requiremet than someone is a slower mover, or going slow and pausing so their compressor can keep up. In any case the lowest my compressor gets while spraying is down to ~75psi, It is at 80-95psi most of the time spraying. If my gun is working good at say 25psi with trigger pulled, and I can maintain that with trigger pulled down within the psi range I know the compressor will be in, then I should be OK from a compressor standpoint. Should be easy to test for start at 90psi and hold it down long enough to drain the tank down to 75psi and see whats its at on the gun the entire time. Thanks for all the help everyone, I think what I have can work, just need the skills to make it work.