Is the ARB Twin Onboard Air the best solution?

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hoser said:
@linuxgod If you have a valve stem laying around, just turn your twin ARB on compare the output with and without the valve stem. The compressor will be more labored (drop in RPM) with the valve stem. Or, take two balloons and inflate them with your ARB until they pop. One with the valve stem in place and one without and measure the time. But as Adrenaline6 mentioned, the 10-35psi test would be most useful.

Additional info from Morrflate:

View attachment 3713611
myoffroadradio.com

The MORRFlate Off Road 4 Tire Inflation Deflation™ Kit • My Off Road Radio

The My Off Road Radio MORRFlate - Inflate, Deflate, and Equalize up to 4 tires. All at one time. Good for any air source. Any size tires. Wheelbases to 155"
myoffroadradio.com myoffroadradio.com
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Oh yeah I’m sure there’s resistance
 
Broski said:
To be clear a bigger tires need less air. this is well documented on the net. and again I'm using a high flow chuck :cool:
If the wire gauge or connections are not correct the compressor is not going to run at it's peak.
I took the time to test all of this

I don't even us a gauge, I ran tests and I know that at a minute 40 seconds I'm good to go.

Street pressure on a 80 is 32psi and less on bigger tires.
View attachment 3713799
My last post on the subject.

Cheers ;)
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True. But there is a qualifier as air pressure requirements aren't just about load and the protecting the tire carcass from overheating. As someone that's run 31s, 33s, 35s, and now 37s, stability is just as important. The 200-series has enough performance to potentially need more air pressure to maintain good stability on larger tires. Running 33s, 35PSI was great. 35x12.5s only needed 35 PSI for RCTIP, but I typically ran at 41 PSI for better stability and handling, and even higher for heavier loads.

hoser said:
Sure... for anybody else....

If you go STRICTLY by load inflation tables, the larger tire will require less air for the same load as the smaller tire. I run 25 psi on one of my cruisers but I know I am at risk of overheating the tires. Large LT tires are at a higher risk of overheating when under-inflated.

I'm not the authority on this, the Tire And Wheel Association (TRA) is probably the biggest authority and they state 35psi is the lowest for many LT tires.

Performance wise, the PUMA compressor without the tank is the equivalent to the SINGLE ARB compressor.

:cheers:
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This has our resident bamboozlers interpretation all over it. Which is wrong IMO.

As above, it's not just about pressures to protect the tire carcass. The tire carcass is not what supports the car after all, it's in the air in the tire. Because of that, you generally shouldn't use lower than the door jamb pressures, even as the tire carcass can handle the heat from lower pressures.

And 35PSI is not the lowest. The TRA was developed for trucks and load handling so the focus of data is on that use case. Not light off-road rigs that happen to use LT tires. The fact that the translation tables only document 35PSI and above does not mean there's no reality to using less pressures. Even your own example of 25PSI tells us that.
 
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kcjaz said:
You got a pic of your tubing and connections to the air box? Cool idea.
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I’ll check this weekend and post em here if I find them. This was on my Tundra.

Which I sold 4 years ago to build the Stupid Ram thing 😂

Also ran the diff breathers to the airbox

Got the parts from Joey at WitsEnd

Haven’t rerouted it on the Ram yet, have all the parts and it’s on the list, but it’s one of those things I just keep putting off as low priority as I rarely use the Ram and attention is on the 200 for now.
 
linuxgod said:
Yeah it was a big scuba tank (power tank). I don’t know the pressure or how many tires it’ll do but @TheGrrrrr does I’m sure. I just know I did 4 tires fast, so those shrader valves can handle a LOT more CFM than an ARB dual can put out
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ARB Twin is great but should be either mounted away from the engine compartment or only run with the hood up for filling tires for best reliability and longevity. Running it for lockers from the hot engine compartment is fine.

The powertank is awesome if you have somewhere to mount it. Most people complain that its hard to get filled for a reasonable price. Skip the paintball and homebrew CO2 fillers and go to your local welding supply. I get my 20lb tank filled for $18. It will handle a lot of tires.

I will say tire size had the biggest impact on my choices in the long run. My 34's on the 200 were fine with the ARB Twin but when I added an old ARB Single to the equation for a DIY ARB Triple... that was the ticket. With the in-deflate 4 hose, I'm always aired up first.

On my 80 the ARB twin was ok-ish on 35s but was always annoyed that it was a lot slower than the 200 with the triple, so when I jumped to 37's, I pulled my old 20lb PowerTank out of storage and now I can air up 4x37s with the in-deflate and powertank in well under 5 minutes. Probably more like 3:30. Thats rad.
 
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I bought the ARB Twin Motor Portable 12V Air Compressor Kit CKMTP12 last month.



I was thinking to buy the ARB Twin Motor Air Compressor and install it somewhere of the car, looking the best place of my Hilux to put it and everything that the installation requires, but I have to accept, that I don´t have the enough time to really enjoy my car as I would like to enjoy it.

For that reason I decided to buy this portable ARB Air-Compressor Kit/Pack, If you think that you need it, just take the Box and drop it somewhere of the car.




The all Package is really well done, not fancy, not crappy, let say functional.

The Harness is enough long to put the Box on the floor and connect it with the 12v Battery, the air Hose is enough long to inflate all the tyres, but you have to buy the inflator (not included in the Kit 😑)



I think it is a valid option for those of us who need a compressor in some sporadic situation or occasional off-road trip.

Regards from the Alps.
 
I have been running the ARB twin in my engine bay for years with out issues.

It runs my lockers and when I need to re-inflate my tires I use it.
 
I've been running the ARB Dual underwood for a few yeas along with adding the ARB Pressure Control Unit that allows you to preprogram a few different pressure settings (controllable through phone App), these are useful to fill up to and bleed down to.

If I was purchasing today I would get the new brushless Dual that offers higher flow rates and lower amperage. Word of note, I mounted on a Slee bracket that places it on LHS near the starter battery, thus the ARB wiring harnesses are very long. Rather than wrap them up as many do, I trimmed them to length and fused direct on battery.

1. Controller Solenoids; 2. Air Controller module; 3. Fueses. . The rear air chuck in photo is direct of pressure tank and is unregulated, mounted forward by radiator is a controlled port.

IMG_1820.webp


IMG_2132.webp
 
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On my 80, I have a pair of ViAir 444c compressors (200psi max/100% duty cycle@100psi)
They feed a 3 gallon aluminum tank on the framerail that's plumbed to a pair if ports on the rear bumper.
One has a ball valve while the other has a solenoid for draining the tank (or shooting nerf darts lol).






Been using ViAir compressors for years and never had an issue, but there are some cheaper options that have also worked out well for me.....
 
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^this guy knows how to party
 
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