Bud777 Posted April 30, 2013 Share Posted April 30, 2013 I was looking for a way to have compressed air for an exhaust jack or for re-inflating tires and I had an crazy idea. Maybe everyone has already been doing this, but I wondered what would happen if i took an air hose and added fittings so that one end could go into a spark plug hole and the other end would fit on the tire or exhaust jack. Then I could run the engine with one cylinder missing and use that as an air compressor. This sounds too simple to work, what do you think? Hmmmmmm, on second thought, maybe it is not a good idea to pump the tires full of a combustible air/fuel mixture. Other than that, great idea :) Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted April 30, 2013 Share Posted April 30, 2013 :hmm: :dunno: Link to comment Share on other sites More sharing options...
Keyav8r Posted April 30, 2013 Share Posted April 30, 2013 Second thought is the better of the two. Fuel/air mixture in tires (or any container other than an engine cylinder) is not a good idea. Link to comment Share on other sites More sharing options...
AeroNautical Posted April 30, 2013 Share Posted April 30, 2013 Hmm, take the fuel injector and plug off the tip for that one cylinder... We're just gettin dangerous now Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted April 30, 2013 Share Posted April 30, 2013 Wouldn't it just be a better and safer idea all around to convert your A/C compressor to an OBA system or buy a 12 VDC compressor and tank? Either of those two options aren't that expensive, especially compared to the cost of potential damage that can be done to your engine or tires, or you... Link to comment Share on other sites More sharing options...
JeepcoMJ Posted April 30, 2013 Share Posted April 30, 2013 can't. You'd need a check valve on the fitting otherwise it would just cavitate air. And you'd have to shut off the fuel injector....which would cause issues in the ECM. not a great idea. Link to comment Share on other sites More sharing options...
Keyav8r Posted May 1, 2013 Share Posted May 1, 2013 Wouldn't it just be a better and safer idea all around to convert your A/C compressor to an OBA system or buy a 12 VDC compressor and tank? Either of those two options aren't that expensive, especially compared to the cost of potential damage that can be done to your engine or tires, or you... That's the ticket - 12 VDC compressor! Link to comment Share on other sites More sharing options...
Automan2164 Posted May 1, 2013 Share Posted May 1, 2013 Slightly off topic, but the older tow behind job compressors used to use a v-8. One bank of cylinders remained untouched and working, the other bank got a new head and air system for the compressor part. Grimmerschmidt actually makes one that is current, or somewhat current. Rob Link to comment Share on other sites More sharing options...
jimoshel Posted May 1, 2013 Share Posted May 1, 2013 Not sure just when it originated but I do know there was adapters for airing up tires by removing a spark plug back in the late forties. Could be purchased at any auto parts store. Link to comment Share on other sites More sharing options...
Comanche County Posted May 1, 2013 Share Posted May 1, 2013 The old Willys flathead 134s were sold as air pumps, they used the center two cylinders as the compressor and the engine ran on the outer (#1 & #4) cylinders and it remained balanced enough to run. They were called the Hesse Hornet. Hobart also used them as generators. I think its a plausible idea to run one cylinder temporarily as a pump, but like mentioned above, its easier to convert your AC compressor to an air compressor.....that's what an AC compressor is anyway, just an air pump. Its a really easy DIY job. Link to comment Share on other sites More sharing options...
JeepcoMJ Posted May 1, 2013 Share Posted May 1, 2013 All of those are plausible by the fact that they were low pressure fuel supply. Using a fuel injected 40PSI system is inadviseable. Rob, that system you are talking about works great...I've actually worked on one that was used as a pressure pump for an industrial sandblaster. No fuel supply to the bank in question. Actually, I've built a VW 1600 dual port compressor, using one bank to power the compressor. no fuel supply to that bank...just an adapter to take the intake runner straight to a filter, and check valves for intake stroke were necessary on the spark plug holes. Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted May 1, 2013 Share Posted May 1, 2013 Wouldn't it just be a better and safer idea all around to convert your A/C compressor to an OBA system or buy a 12 VDC compressor and tank? Either of those two options aren't that expensive, especially compared to the cost of potential damage that can be done to your engine or tires, or you... That's the ticket - 12 VDC compressor! I have one for my train horn on the XJ. Eventually I am going to modify it and run a bigger tank for OBA. Link to comment Share on other sites More sharing options...
jpdriver1 Posted May 1, 2013 Share Posted May 1, 2013 Not sure just when it originated but I do know there was adapters for airing up tires by removing a spark plug back in the late forties. Could be purchased at any auto parts store. still have one in storage --- wooden box and all :yes: Link to comment Share on other sites More sharing options...
Blue88Comanche Posted May 1, 2013 Share Posted May 1, 2013 Wouldn't it just be a better and safer idea all around to convert your A/C compressor to an OBA system or buy a 12 VDC compressor and tank? Either of those two options aren't that expensive, especially compared to the cost of potential damage that can be done to your engine or tires, or you... so how would one convert their AC to OBA? my system has a leak and the compressor is still good. Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted May 1, 2013 Share Posted May 1, 2013 Wouldn't it just be a better and safer idea all around to convert your A/C compressor to an OBA system or buy a 12 VDC compressor and tank? Either of those two options aren't that expensive, especially compared to the cost of potential damage that can be done to your engine or tires, or you... so how would one convert their AC to OBA? my system has a leak and the compressor is still good. http://www.lmgtfy.com/?q=a%2Fc+to+OBA+jeep http://www.jeepforum.com/forum/f11/c-oba-conversion-write-up-pics-471962/ http://www.cherokeeforum.com/f51/c-pump-converted-oba-renix-4-0-a-91610/ http://www.naxja.org/forum/showthread.php?t=1053742 Link to comment Share on other sites More sharing options...
randomguy310 Posted May 2, 2013 Share Posted May 2, 2013 ive seen those before for old tractors. air would be super hot was my thought Link to comment Share on other sites More sharing options...
Comanche County Posted May 2, 2013 Share Posted May 2, 2013 Wouldn't it just be a better and safer idea all around to convert your A/C compressor to an OBA system or buy a 12 VDC compressor and tank? Either of those two options aren't that expensive, especially compared to the cost of potential damage that can be done to your engine or tires, or you... so how would one convert their AC to OBA? my system has a leak and the compressor is still good. There are tons of threads about converting your AC compressor to an air compressor.....after all, that's exactly what an a/c compressor is,,,,its just an air compressor as is any internal combustion engine. I'm currently using a renix A/C compressor for an onboard air compressor. This is just the beginning, I'm using an old Rigid 150 psi compressor for the tank which will be mounted under the bed where the spare tire mounts. Link to comment Share on other sites More sharing options...
randomguy310 Posted May 2, 2013 Share Posted May 2, 2013 nice I read an article in JP magazine about this a few months ago Link to comment Share on other sites More sharing options...
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