I am looking at on board air for my truck. I did a search, but have a couple of questions. A couple of you guys said you got the York compressor from the junk yard, my question is, out of what? Somebody else set theirs up so that when the comp. turned on, the engine throttled up, How was this done, pictures would be nice. I have to remove my spare tire for the custom exhaust, and will be installing two tanks under the bed in that area, with heat sheilds of course. I want to thank everyone in advance for your help.

 

http://www.vmac.ca/underhood/vr70.htm

This is the mother of all onboard air systems. Can you say 70cfm on board???

YIKES!

 

You might try giving Brad at Kilby enterprises a call. He is the one that makes the mounts for the york for our trucks. He probably has all the info you could need on the subject.

 

www.onboardair.com

that is kilby enterprises site

 

This is what I use. About $375 from www.awdirect.com.

https://www.dieseltruckresource.com/...cat/500/page/1

 

What purpose would heat shields perform on an air tank?

 

I would third going with Brad Kilby and his on board air setup.. Im a little biased because I was a tech rep for him for about a year and a half, and he's a good friend of mine, but his stuff can't be beat. OBA is the first thing thats going on my rig.
Scott

 

I have the Kilby System on my truck. I am also the one that has the truck throttle up when the compressor is on.
I have my system wired a little different than most people. My compressor is actually on all of the time the ignition is on. The pressure switch opens the circuit when 135 psi is reached. Inside the cab I have switch connected to an air solenoid valve that opens up can be opened up whenever the compressor kicks in. There is an air line that runs to a small air cylinder that pushes the throttle lever.
I have a 5 gallon air tank under the bed outside the frame on the right side. i use the air for my air horn, rear air bags, airing up tires and driving my air tools when needed.
The compressor I am using came off a mid 80s Ford.

 

I will have an exhaust pipe running across, where the spare tire used to be and the air tanks will be. I don't want to get the tanks or air too hot. I will be installing an air locker, big air horns, and running tools.

Thanks Tom for the info. I assume the compressor you are using is the AC comp.? I was looking at maybe getting a 'pull' solenoid to do the high idle. I sat down and thought it out on how to wire it, so I can also use a switch in the dash to idle up. By using a regular fan relay in the trans. neutral switch curcuit, I can avoid it idling up while sitting at the trffic light , and still be able to manually turn on the idle-up. This is my work/family truck, so I am trying to keep things 'hidden'.

 

Mine is stick. when i turn on the Hi idle switch it also bypasses the clutch switch so the truck will start with stepping on the clutch. That way when i am really working around it I don't have to get init to start it every time.

 

How, exactly, does your hi-idle switch work? Your design?

 

I have a small air cylinder from an Ingersoll Rand air Compresser mounted at the TPS. When extended it pushes the throttle open about 1/4 inch. Air flow to the cylinder is controlled by a solenoid valve. When the idle speed switch is turned on
and the air compressor kicks in the valve opens sending air to the cylinder.

 

Nice!

 

100% duty cycle, doesnt that mean it never shuts off? Kinda wasting power/economy on the trucks that might use them for air bags and what not?

 

No I do have a pressure switch that shuts it off at 135 psi. What I meant was I have the circuits wired through the key. When ever the engine is running the compressor can come on and off. Because of leaks and air usage in the air bags it kicks on for about ten seconds every half hour or so.