I'm trying to gather up the stuff i need for my On-board air project, and am needing to know what CFM I can expect to get out of a york compressor. I was looking at buying a Load Genie Unloader, (Check valve and unloader all in one) But not sure of the CFM flow.

Depends on the York 206/209/210 but 6 CFM @90 psi is common.

From: http://www.kilbyenterprises.com/compressors.htm
York 210 series compressor. Large 10 cu. in. displacement fills tires fast. Real fast! Rated at 4 CFM at 90 psi while running at 1200 rpm. Capable of 8+ CFM!

Yorks will pump a lot of oil into the compressed air, there is a modification to reduce that, several write ups are arouinf the interweb, here's one:
http://www.jedi.com/obiwan/jeep/york_oilmod.html

Service manual: http://www.ccicompressor.com/docs/CCIsrvice.pdf

I have a hand throttle in the cab setup so I can increase the rpms. I run a tank and have never had to use the hand throttle for the OBA. One, because I have had enough air and two, the thing sounds like it could exploded if it were spinning real fast. It gets really hot too for extended use and high rpms. Make sure you use good fittings and hose. I had a hose catch on fire and melt apart under the hood. Scared the crap out of me. It didn't help that the compressor continued to shoot hot oil and air everywhere.

Oh yeah, pulley (on the compressor and alternator-in my case) size make a difference in output. Google OBA, then york 4x4 and you'll have a couple of nights of reading. Enjoy.

Thanks for the info, the york I have is the big 210. I looked and looked on kilby's site for the output, guess I scanned over it to quick. Also Is there anywhere or anything else I can use besides Kilby's 50 dollar Flange adapters? Mine has the Flange style with barb fittings so I thought about using good hose with clamps.

If you have the stock fittings you can tap, flare, etc...get creative. You need a good hose rated for high temp or they will melt/blow off. The air coming out is hot!

Have you ever written something, forgot about it and years later did a Google search and found that someone put what you wrote on a web page?

Google search for 'york compressor CFM' yeilded this as the top link:

http://www.tmcom.com/~tsm1/scout/faq/york.html

Looks like I transcribed that data from a a very old JC Whitney catalog about a decade ago.

Also Is there anywhere or anything else I can use besides Kilby's 50 dollar Flange adapters?

Mine were made from the late and great Jason Payne (willyswanter). I think he charged me 15 bucks. They are awesome.

Thanks all, as for the hoses I was thinking of using 3/8 I.D. hydraulic hose with the crimp on fittings, Would that work.

Thanks all, as for the hoses I was thinking of using 3/8 I.D. hydraulic hose with the crimp on fittings, Would that work.

Thats what I use, has held up for 7+ years under the hood of a 77 Scout. No sign of heat damage or deterioration.

Got most of the stuff done today, and am getting ready to install the oil removing filter and the air manifold.

I have one other question , how many people have done the internal oil modification and is it worth doing to cut down on oil output.

I've done the modification and noticed no difference. I think I've read about 2 different modifications. It was so long ago I forget what the second one was. Anyways, I was told it is bad to do because the head doesn't get the lubrication it needs. Just get a good filter right before the tank.

I bought a filter that is suppose to remove 99.9% of the oil so will see, figure I needed the filter anyway I went , can always do the mod later. I also had read of two different ways to do the oil mod. basically the same mod just blocking the port different locations, one was a little easier to access then the other.