t-boe

You can't just leave us hanging like that. Where can we find said compressor?

bnold

That one I dont know, will do some digging...

bnold

Here is an a write up someone did but doesn't mention the type of compressor used.... Will look some more:
Alas, I needed compressed air for the air over hydraulic brakes, and the engine I had acquired did not have air. Money fixes all things, and Cummins Northwest rose to the occasion. This model engine has a PTO opening on the back of the front plate below the injector pump for an air compressor (and the air compressor in turn is capable of taking a power steering pump on the back of it if the application requires.) Installing the air compressor kit was a bit of an experience. Cummins sorted out all the parts I would need, but I had to figure out which piece when where. The plumbing is something else. Never having done it before, or seen one with an air compressor on it, It took me about half a day to bolt and connect the aircompressor and plumbing working from the parts book diagram. Some changes are pretty subtle. You remove the cover plate from the back of the front plate of the engine, but you can't bolt on the compressor with cap screws, so you install two stud bolts and then mount the compressor, but first you have to replace one of the plugs in the oil gallery with a stubby 'allen head' plug for clearance because the long plug conflicts with the compressor body. Actually it didn't have a long plug in it--it had the oil line for the feed to the Bosch injector pump there--but I had to move that for clearnace reasons. The oil line was happy in the next oil gallery hole back, but that had the oil pressure sender unit in it, so that got moved to the other side of the engine in front of the starter.
The air compressor is water cooled, and so the plumbing included to weirdly bent tubes to feed water to and from a couple plug holes in the side of the head. The compressor is fed air from the intake manifold via yet another weirdly bent tube that comes down from the intake manifold (which is integrated into the head). This was the one thing that I had to sort of innovate on. The cummins Kit stopped with a sort hose right outside an aluminum drive in expansion plug on the side of the head. After some head scratching, I decided that a short half inch pipe nipple needed to be added to the mix. I pried the aluminum plug out expectig to find threads behind it. There weren't--- just a smooth hole, but in measuring it, it was drilled the right size for a half inch pipe tap. The challenge here was to tap threads in the side of the intake manifold without getting cuttings into the inside of the engine. Fortunately there was a little lip inside becuase of a machining issue (the hole wasn't drilled all the way through). I tapped it for half inch pipe, carefully cleaned the cuttings out of my work, screwed in a short nipple, and slipped the provided hose over the protruding end of the nipple and clamped it down with the provided hose clamp. By taking in air in this fashion from the manifold, the compressor gets fed pressurized air as 'pre compressed' by the turbocharger which gives the compressor an advantage over having to 'suck in'. It also implies that the compressor gets 'clean air' and doesn't need its own air cleaner. My total package of 'engine mods' mentioned here were about $1500 and of that the aircompressor was around $1000 of it. Ouch. Boy do they see you coming on compressors. For an air governor we were able to simply move the one over from our takeout engine and it bolted right on the compressor in a standard way and did not require metric bolts.

Sandaholic

That.....sounds.....pretty.....crazy . Anybody know if there is any other setups like this? Maybe I'll just go with a Kilby setup? Or has anyone done this on a 3rd gen? Also the cheap 12V compressors are starting to look pretty good

pind

If you want a good engine mounted compressor

http://www.vmac.ca/

there it is, have a look

TonyB

The electric ones are fine for low volume use. i.e. <1-2cfm

The only issue I have with the kilby kit is that they do away with the clutch pulley on the alternator. I would be concerned that you'd start having serpentine belt issues.

Tony

Sandaholic

I've seen these. Whats the price

Good point, not that I needed to be disuaded very much
I think I'm going to get some dual 380C viair's seem pretty popular. Low amp draw, 100% efficiency at 100 psi, 200 psi max and I haven't seen any folks posting negatively about them.

Totallyrad

They're not all wimpy. I've got a link to one more that I really like but I can't find it. I'll post it up if I get my brain back.


http://www.awdirect.com/default2.asp?keyword=compressor

http://www.supertruckusa.com/product...?kw=compressor

http://www.extremeoutback.com/index....d=2262268.3812

Sandaholic

Trailhead air compressor from Oasis?

http://www.okoffroad.com/stuff-oasis.htm

TonyB

I have a viair...can't recall the model. 450C IIRC.

The Oasis compressor would be the way to go if you needed a lot of volume and did not want the hassle of installing an engine driven unit.

Tony