Jackie previously posted:
"I've got the Q Industries MV50 SuperFlow Hi-Volume Air Compressor. For the price, I can't complain. It takes a few minutes to air up each tire but the only thing I don't like about it is that you can't just push it on to the valve stem and quick-release it off. You have to screw it on and off. So I have to over-fill my tires because I loose air when taking it off. Is there some sort of adapter I can get to resolve that problem?"
You could put an in line air valve in like this one....
However, like Rob said, you might loose 1psi or less undoing the screw on thing. I would take that over having to hold traditional style tire petcock on.
Speaking of, 4Crawler (a Toyota vendor who makes a multiple tire deflator system too) has "clip on" style petcocks that look like miniature versions of the quick release style thing on the end of hoses for air tools and such. They clip directly onto the valve stem and seem to be the best solution I have seen for tire filling with slow pumps. Looks like this (the far right one, with the other two being traditional style clip on ones)....
He sells them for $9.50 each, and I was thinking about ordering one. If anyone else is interested, the let me know and we can maybe set up a group buy. Looks like it screws onto a normal 1/4" NPT thread, but I'll find out for sure if we order them.