SpudFiles

first of all does anybody know how those 12v air compressors work?(the ones for your car). secondly is it possible to make one that will run on a rc car motor and a 9v battery? i am not looking for insane pressure but what kind of pressure could i be looking towards? i have looked every where and have been unable to find anything, so any help will be much appreciated. thanks

A nine volt battery wouldn't work for very long running an air compressor, but those small compressors actually work.

but can i make my own?

A nine volt battery won't even start the compressor, pretty much only car batteries will. A 12v compressor suck a lot of amps, but a battery is only designed to chemically feed some milliamps. Charging a car battery yourself requires some research, if not mistaken they produce explosive hydrogen gas when charging.

I was looking at power supplies yesterday and found one of these for $100, 260psi compressor and 400watt battery powered lol.
http://www.wagan.com/htmls/powersupp.html

CAN I MAKE MY OWN THOUGH? i know about these and i have one but i want something that is more portable than carrying a car battery everywhere.

Make your own battery bank, yes. Just google around for methods of safe charging.

Make your own battery powered high pressure compressor, I doubt it, it requires a lot of wattage no matter at what voltage, which is difficult to power by batteries besides car battery. Even if you could make a small low powered pump, it'll take forever for it to charge. Sorry mate.

Make your own pump, yes. Just get a bicycle pump, they do pretty good. If you're looking for something under 100psi, just use a propane tank, they're at 90-100 psi @ 25'C.

I tried using a 12v compressor, but it only went up to 30 psi.

finaly i get the answer i am looking for. this is a off topic question but do regulators have a certain pressure limit? for example could i use a regulator on co2 or do i have to actualy have a co2 reg.

All regulators has its own pressure limit. The differences is pretty much different sized/shaped fittings. For spud guns with co2, you can just use any regulator that fits well and can handle the pressure.

Some regulators will only go so high in pressure. Not too long ago I was able to pick up a tippmann bottom Line regulator for about $30. They are adjustable from 0-800psi on one side and unregulated on the other side (can be plugged with an 1/8" pipe plug). There is a slight problem with the regulated output though. I have not been able to find an air fitting to fit the threads (10-32 threads). It can be inexpensively overcome though, basically just drill a hole though the center of a 10-32 screw and cut off the head, drill and tap a 1/4" pipe plug to 10-32 threads, put the regulator and 1/4" plug together with the homemade 10-32 air pipe and lots of Teflon tape.

I added a 90 degree elbow and quick disconnect with mine.

The only thing you will be able to run on a 9 volt battery is a lego steam engine that is run in reverse to compress air from a motor. Do a google search for lego steam engines and you will see what im talking about, I think it is quite neat the way lego have made an engine that you can build yourself.