I have a spare 1200 type 1 motor. Does anyone have plans or directions, on how to transform/build one of these engines into a twin cylinder air compressor?
Any ideas, anyone?
Regards,
Mark
:thumb

http://www.vwfarm.com/aircooled/v-air.jpg 
like that one?

http://www.offroad-imports.com/mogs.php?style=acc# 

couple of compressors here too, but no plans. some dude won a prize for selling vw powered air compressors on ebay. apparently they're so good and reliable that everyone should dump their industrial 10,000 dollar ones and get stuck into a vw

In the thread
http://www.aussieveedubbers.com/forum/viewthread.php?tid=9842 
Andy mentioned special heads used by Qld rail.
HTH

Mark, the usual design is to have two cylinders (#3 + #4 I think) operating as a compressor, driven by the other two cylinders.

The compressor side has ball check valves screwed into the spark plug holes, with the exhaust pushrods and lifters removed.

I was chasing one of these a few months ago, but somebody else decided that they wanted it more and bought it out from under my nose. I know where it is though, so I'll try to get some photos of it.

Hey Col, if that's all they are, might have to see what we have here at work to use. Might be able to supply checks that will screw straight in with an outlet to connect to what ever you need (tank etc).
If a few people are interested I'll look into it.
Col if you have any more details please let me know. At a guess a check + adaptor should be ~$30ea (two per motor).
:thumb

I guess it would also require a few fittings to connect the check valves to the tank, maybe a water trap and a gauge, as well as a safety blow-off valve (because the motor won't stop/start like an electric one will).

The 'factory' (loose term) ones also had a governor, but I guess it could be done without one.

Richard, if you have that sorta stuff at work, I'd be interested in having a chat about it. I still have two spare motors in my shed.

I found this on the web. It's got a few pictures and an explaination. It looks a little more complicated than at first thought.
If we put our heads together and help each other with ideas, then we might come up with an out come, suitable for everyone.

http://mywebpage.netscape.com/alphahr/volksair.htm

Regards,
Mark

Cols idea sounds doable.
Would be nice if some one had a pic, or some details of the check used. Would also make a great spare motor. Just whack the push rod and rocker back in a spark plug and your in business.
The compressor side will also need to breath fresh air, not through the carb!!
I will investigate!!

Andy, if you need anything from me, then let me know if I can make you job a little easier. I'm serious with this. Let me know if I can help.
Regards,
Mark:thumb

Nobody has any info on other variations.
Or even a pic of an old one?

duncombemu

I hope your patient. It won't be done in a hurry, but I will get there

If someone is going to make / supply the parts , i'd be interested in getting a set.

I'm not sure, but I think that the VW compressors have a special cam aswell to make the air pumping head run 2 stroke. ie. compression on each upward stroke.

True, but it will still work as Col described without any major mods.
Getting a cam made would be expensive I'd assume?

These was a company in West Australia called Holman Industries that built trailer mounted compressors with VW motors.

Hi all,
The Tasmanian government railways also had some of these compressors. they did not have a tank, but could supply something in the range of 50-60 cfm. I read somewhere "can't remember where" that they had a special grind cam for the compressor side of the engine.

Cheers Damian

give Steven Muller a call he has one and i am sure he can fill in the missing details about how they are set up!

Hey guys, was wondering over the week end. If you just leave out the exhaust push rods to use a stock motor as an air compressor, wouldn’t you loose oil pressure? Oil is sent to the rockers via the cam and push rods isn’t it? (THANKS 11CAB).
Might need to add the check valves feeding the tank to the exhaust ports. Can get away with one check that way also.
Andy
:thumb

What does it matter if the exhaust rockers don't get oiled if they have no pushrod to move them anyway?

Col, what I meant is how is oil feed into the push rod? By taking it out, you leave hole uncovered so you can no loger build up pressure in the oil galleries??
:alien

hmmm, dunno, I'd have to think about it.... maybe chewing gum?

Bugger, sounds like I'll have to rummage through the shed and have a look for myself. Don't like getting dirty hands you know

Me neither, otherwise I'd probably be more help to you!!