Is the ARB Twin Onboard Air the best solution? (4 Viewers)

[linuxgod]

@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

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

Oh yeah I’m sure there’s resistance

 

[TeCKis300]

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
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

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.

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.

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.

 

[Boston Mangler]

You got a pic of your tubing and connections to the air box? Cool idea.

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.

 

[TheGrrrrr]

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

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.