Good thread. Full of useful information.
Thought I would post a pic of my oba to add to the list of them shown in this thread.
I did not run a hose/connect to the rear of my heep, as a 30 foot length of hose reaches all my needs and reduces the amount of hose/connections required to operate.(K.I.S.S.)
Extreme flow compressor made for oba and brand new. Mount is home made. Needs NO constant lube! That's why I chose this compressor
Hoses, copper tube and connections are from Home Depot
Manifold from Northern Tools
Pressure regulator is from ARB, as I have dual air lockers, and need the pressure to be set for them(90psi on/105 off)
Pressure relief valve, check valve, and gauge from a local pneumatic store
Air tank is small, about 8inches around and 16 long(2 gals?) from a Kenworth 18 wheeler to power the air horns(cheap)
The air tank will hold enough air to cycle the air lockers on/off about 15-20 times
It gets hot, that's why the soft copper tube coming from the compressor to the tank and from the tank to the manifold. There is 5 feet of 3/8 inch dia. copper tube in that coil(if you look, you will see the coil is the exact size of one of those round bulk CD dispensers.
I added a thumb throttle( IMO only for a manual trans as it CAN be dangerous without a clutch pedal to disengage it quickly) to ramp up the cfm for tires.
I get my fresh air from the grill as the air under the hood is already hot, and putting hot air in an already hot compressor makes little sence, this little detail reduces the temp quite a bit.
The air tank is secured under the battery tray with big hose clamps. Works, simple, easy.
I did not have factory air so I needed to add a second idler pulley:
The tank under the batteries:
Sorry for the LOONG post...