Where can i buy just this ? i need 6 of them..

cant seem to track down a site i can buy replacement parts for a tester...

What brand? Got pics? You can make some from old sparkplugs and air hose quick disconnect fittings if that's the style your compression tester takes.

Maybe Mac tools, Snap on, etc?

any brand.. its not for an actual tester... but it's gotta have the check valve in it

What are you making?!? A six cylinder air compressor?

What are you making?!? A six cylinder air compressor?

Cant talk about it.. TOP SECRET STUFF :smokin::smokin:



yes

Sounds like a crazy project! Compression tester fittings aren't going to work because they are not designed for high flow. It's basically just a little schrader valve. No way you could push a cylinder's full displacement of air through that little valve at operating speed.

Any plumbing supply should have brass check valves - they might flow enough, but are not designed for continuous operation.

Maybe use the check valve from an older Ford EGR system? They'd certainly flow enough, not sure about the pressure though. You'd want something like a reed valve for your application.

i read it on another thread here.. sounded like a stupid idea but in theory it would work oh so awesome.. So i gotta try it out hahah .. its a junk 4.3 so what the hell right ? only thing i have to buy is Check valves.. And i couldnt find anything online except the compression tester leads..

Why not plumb all the lines together and at the "collector" install a check valve, like a regular compressor. 6 check valves can't be terribly cheap.

Why not plumb all the lines together and at the "collector" install a check valve, like a regular compressor. 6 check valves can't be terribly cheap.

Because you then have to compress all that plumbing up to the collector and you will not be able to reach a good PSI. Check valves should be as close as you can get to the cylinder.

Could you drill out the holes and tap them to something more standard? After all, it won't be holding spark plugs any longer... :homer:

Have you thought about how much power its going to take to turn this thing?

Have you thought about how much power its going to take to turn this thing?

big ol 220v motor sitting in the shed i pulled off an old compressor


like i said im not taking this thing seriously i just have most of the stuff and wana try it just to say i did.. if it works then thats awesome




one check valve wont work.. the piston compressing will just be pushing air into the cylinder that's on intake.. it'll just run and do nothing..

You can get em from snap-on etc, but they aint cheap.Your cheapest bet would probably be the 9.99 compression gauge from HF.

Took awhile to get ahold of my buddy that has one of these.
He used air compressor check valves (whoda thunk??).
Grainger has 1/2" npt and 3/4" npt.
1/2" are $15.45 each (Grainger part # 4X828) "control devices" model # IC50
3/4" are $23.07 each (Grainger part # 4X829) "control devices" model # IC75
Another idea might be reverse flow check valve for O2 side of torch. They are 9/16"-18 R.H. thread. $7.99 each, grainger part # 3WU27, sure they would flow enough, not sure they would have the "duty cycle" life needed.
And there is a post for some % off at Grainger on here

1/2" are 20 a peice on their site.. too rich for something im just doing for fun