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Home made air compresser

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dave#1

04-02-2003 20:08:19




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Maybe someone out there can help me, somewhere out there someone showed how to make a air compesser out of a automotive engine block, I thought it was PM but did'nt find anything when I did a search there.

thanks

later,dave




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wrenchman

04-04-2003 01:28:30




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 Re: Home made air compresser in reply to dave#1, 04-02-2003 20:08:19  
almost takes longer to describe than to do...easiest is with a v8 or v6...you do 1 side & run the other side to power er...remove the pushrods & rockerarms on 1 side & pin those lifters in their bores to hold oil pressure(hold them OFF the top of camshaft lobes while pining em or you will break the cam when you start it)...(may also need to plug oil feed to head if engine has shaft mounted rockerarms)...then replace the EXAUST valve springs with some you can easily push down with your fingers...cleanout exaust manifold on that side & fab airfilter hookup(is now intake)...leave the intake side alone so the manifold will stay sealed(you DON'T want gas vapor mixed in your compressed air...read BOMB!!!)...remove the centers of the sparkplugs for that side(ceramic part)& tap pipe thread & install check valves to let air OUT(bout 1/2" to 5/8" inside diameter valves)...(must have seperate checkvalve for each cylinder)...using hipressure lines hook all together into 1 large outlet & this hooks into your tank...take the plugwires for that side & hook to four sparkplugs screwed into a cross pipe fitting grounded to block(doesn't matter if they seal or not you are just preventing electricty back feeding into ignition)...DANGER-DANGER-DANGER-DANGER...this setup will produce a large quantity of air at high pressure...use a LARGE RELIEF VALVE (bout 1&1/2" pipe or bigger should do er)set to a SAFE pressure for your tank...it WILL reach relief valve setting quickly(depending on engine condition)& WILL open it...or blow your tank if valve is not big enough...so STAND BACK the 1st time you run er up to pressure(way back)...feller i used to work for used em to sandblast with...worked quite well...noisy as heck though with the relief valve popping off all the time...you will have to rig a throttle control so you can set engine speed...IIRC bout 2500 to 3000 rpm works well...

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wrenchman

04-04-2003 01:46:43




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 Re: Re: Home made air compresser in reply to wrenchman, 04-04-2003 01:28:30  
BE CAREFUL!!!!...this monster can really hurt you...old feller i learned this setup from blew up two tanks over the years(stuck relief valve both times)...one of which took out part of the back wall of his shop...make SURE your relief valve works...



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Slowpoke

04-05-2003 22:26:43




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 Re: Re: Re: Home made air compresser in reply to wrenchman, 04-04-2003 01:46:43  
Wrenchman..... Can two safety valves be used in parallel? There would be little chance of both getting stuck at the same time. Unless the unit was left out in the weather.



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Thanks.................dave#1

04-04-2003 18:27:53




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 Re: Re: Re: Home made air compresser in reply to wrenchman, 04-04-2003 01:46:43  
Thanks Wrenchman, I'll check into it.

later,dave



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wrenchman

04-04-2003 18:58:32




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 Re: Re: Re: Re: Home made air compresser in reply to Thanks.................dave#1, 04-04-2003 18:27:53  
oh...almost forgot...you also want to block the heatriser in intake manifold...put a piece of shim stock between intake & head on the side you rework...will prevent exaust gases from getting into compresser side...use a piece of stainless steel shim stock bout .015" to .02" thick & put between gasket & head...needs to be stainless so it won't rust out...



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Thanks again........dave#1

04-05-2003 05:03:42




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 Re: Re: Re: Re: Re: Home made air compresser in reply to wrenchman, 04-04-2003 18:58:32  
In this day and age I wonder if a port injected engine would work the best, you could disconnect the injectors to the said cylinders, and do to the valves,lifters like you said, it might run and start alittle better than a carbed motor?

later,dave



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JerryU

04-03-2003 12:06:30




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 Re: Home made air compresser in reply to dave#1, 04-02-2003 20:08:19  
Just to bring this full circle--don't use a water heater for an air tank. Had to do that. Seems like about four years ago??

JU



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JMS/MN

04-03-2003 07:51:48




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 Re: Home made air compresser in reply to dave#1, 04-02-2003 20:08:19  
Try FARMSHOW archives.



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