Engine Air Compressor?

[BrentD]

How will you cool it?

Still working that part out, although I suppose I could leave the original water pump intact and continue to use the original cooling system.

Why the two check valves. With the exhaust valve locked closed just one check on the spark plug exhaust should do the job if you go that route.

Note: removing the intake valves and placing a check valve on each cylinder intake would probably work much better. That would get rid of the valve train.

You could also forget about the spark plug exhaust and use a check valve on each isolated exhaust valve port. Larger port size that way for better fluid flow.

I was planning on retaining at least the intake valves to avoid having to fab up a check valve adapter for each intake port, although that is another possibility. I'm just trying to get by with as many off-the-shelf parts as possible. That was part of my reasoning behind the second check valve. In a 4-stroke engine, the intake and exhaust valves are both closed during the power stroke to allow the expanding gas from the burning fuel to force the piston down. The power stroke would be irrelevant in a compressor application so I would need to either find a way to force the intake valve to open on every down stroke, or use an additional check valve to allow the sparkplug port pipe to function as an additional intake for the power stroke.

One option for changing the valve operation would be to replace the camshaft sprocket with a duplicate of the crankshaft cog. Normally there would be a 2:1 ratio between the size of those two pulleys to make the camshaft rotate once for every 2 rotations of the crankshaft. If I made the timing cogs 1:1 and removed the exhaust rockers I could do away with one set of check valves.

 

[Taylortractornut]

My grand father had 2 of these units on was a 6 cylinder and the other a Willys 4 cylinder that the 2 insides ran the six rand off the 3 front ones and rand air of the 3 back the yburnt in his shop when I was a pup. I know the son of an old MM dealer that has a flathead Ford that 2 inside pistons on one bank pup and the 2 outside ones on the other pump. Shramm sp made several tractors using Farmall and Fordson, and Ford tractors that did this to run Jackhammers My nieghbor that had an old asphault company had one they used to use It was a Farmall based tractor had squared sheet metal. They used it alot then parked it for about 25 years I tried several times to buy it with the old man saying hed get to using it again then scrap went up and it rode a boat to china. Ive seen several old pictures of Schramm loader tractors with buckets to remove and load the chunks, They had several backhoes like this to that had a hammer that could be put on the end for an old time hoe ram. I also saw a man use a V8 with a plastic plate epoxied in the intake seperating the banks with a 2 barrel or one barrel carb mounted on one side and and air filter o nthe other side. He did something with some of the push rods I think reoved them on the air side. It ran very good infact he had enough CFM to run a large pot type blaster repainting boat hulls.

 

[Egon]

OK, with your two checks off the spark plug why not just keep the intake and exhaust valves closed permanently. Eliminates the valve train and keeps it simple.


OR


Aircooled.Net, Inc. - Online Autoparts Catalog

Using a Volkswagen engine.

 

[gizmo]

Brent,

Not quibble on the compression ratio thing, but the piston in an air compressor is flat top and strokes all the way to the top of the cylinder leaving no appreciable air volume. The valves are just spring loaded check valves seated right against the face of the head and only the intake valve extends into the cylinder during the intake stroke. Nonetheless, this is just an interesting technical detail often overlooked.

 

[Iplayfarmer]

OK, with your two checks off the spark plug why not just keep the intake and exhaust valves closed permanently. Eliminates the valve train and keeps it simple.

That's what I was going to say. Just take out your rocker arms completely and run a check valve off of each spark plug hole. Now you've got air volume from each stroke, and you don't have to worry about all the added fabrication. Run the tubing from each cylinder to a cross pipe fitting and run the fourth side of the cross to your tank.

You're going to need a lot of power to run this thing, though. 30 CFM at 100 PSI no matter how you do it is going to take a lot of power.

For cooling, what would be the problem of just leaving the existing cooling system in tact? Your engine is going to be turning, you should be able to keep the water pump working and just run the radiator and cooling system like you normally would. If you went the two engines option, you could also run coolant from the powering engine through the pumping engine, and then back through the powering engine.

 

[J_J]

I am thinking you will need about 5 HP, CCW rotation electric motor. Here is a 30 cfm compressor.

Burden Sales Surplus Center Item Detail

 

[J_J]

Have you considered a PTO aircompressor?

What kind of work do you do that requires 30 cfm.?

 

[slowzuki]

I was thinking of popping a PTO shaft on my old converted York A/C compressor today. I needed to seat some beads on an old car far from air. After the 3rd trip with the pig I was getting a bit tired of it.

Ended up dragging the car with flat tires and rolling them off the rims while dragging.

Ken

 

[Iplayfarmer]

I was thinking of popping a PTO shaft on my old converted York A/C compressor today. I needed to seat some beads on an old car far from air. After the 3rd trip with the pig I was getting a bit tired of it.

Ended up dragging the car with flat tires and rolling them off the rims while dragging.

Ken

Just a friendly suggestion... Next time you might consider taking the tires off and hauling them to the air instead of the whole car.

 

[gatractorman]

Ok, mabye I dont understand all I know about whats trying to be done (that has happened in the past). But aren't you going to need at least the intake valve functional to let air in the chamber to be compressed?