Viair 444c 5gal fill time

[J.Vale' Se' Diez]

I'm sure this has been asked before but would like some fresh input from you guys.
Been thinking about relocating two air tanks on the outboard frame rails just forward of the rear tires under the bed. I will basically be separating the left and right side comp/ bags/valves into two separate systems. Left front and rear on one and right front and rear on another.
My main question is will two viar 444c's be enough for 2-3 gallon tanks running separate.(would perfer 2 gallon tank but cannot find them...anyone know of a place?) I currently have them filling a five gallon but I noticed that my fill time is almost double of what viar has on their website. Even sent them in and had them replace the cylinder walls and check them out. Everything checked out good (@200psi). But when i reinstall them im still not close to the 5 min mark. Plus my pressure switch is rated at 150psi so my time should be less than theirs. I talked to the tech at Viair and he said I might have a leak in my system but i checked twice with soap and water even left it aired up to 150 psi and a few days later pressure was still holding.
So my theory is to hook each compressor to it's own tank and see if they both have the same fill time(maybe one might not be working 100%).

Any input would be greatly appreciated.
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[Pro Performance]

The 444's will definitely handle filling 6 gallons of air. Usually I recommend at least 1 compressor per 5 gallon tank, but more is better if you want to hit the switches a lot.

It should be very close to what they state on the website. You do want to make sure you have adequate wiring for the compressors, and make sure the engine is running so that it is getting full 13.8V to the compressors.

I am not sure who offers a 2-gallon tank that has larger ports that you would probably want. As a side note, I would look into switching to a 200 PSI pressure switch so that you can take full advantage of the 200 PSI. This also means more air storage, since you are filling to 200 PSI vs. 150 PSI.

You also want to make sure and not tighten down the check valve super tight. You just need it snug enough to seal. Over-tightening may cause the check valve to get stuck, which could cause a slow down in flow. Disconnect the leader hose and run the compressor to make sure air is flowing out at a decent rate, and not completely stopped.

Hope this info helped.

[J.Vale' Se' Diez]

Thanks for the info AZPerformance. After backing off the check valves some(I do have the habit of overtightnening) I dumped all the air in my tank and timed it again. 5min 30sec got me to 100psi and it took 11 min to get to 150psi.
So I took a few pictures of the wiring.(I bought the truck with this setup fyi)
You had mentioned running 13 +volts, not sure if im getting this. How would i go about checking?
Also, Im wondering if i should run them on seperate continuous duty solenoids. Viair recomends 2 - 40 amp relays. Ive looked for 40 amp continuous duty solenoids but havent had any luck locating any. Only ones I could find are 80. would it be safe to run them off of an 80 with my same setup(both comps wired to 1) or shoud i get 2-80's?

[Pro Performance]

You can check the voltage at the relay using a voltmeter, and it should be close to 13.8V. It does not have to be exact, but anywhere in that area.

As for the relays. It is good to have them wired up to relays. You can either do 2 separate 40A relays (which we do sell if you need in the future), or a large 80A. You have a large 80A relay, so you are Ok. You just run one power wire from the battery to the relay, in large gauge, which it is looks you have. From there, you can run smaller wire to each compressor, since it seems your compressors are close to your relay. The two smaller wires going to your compressors can come off the same post on the relay.

From what I can tell from the pictures, it seems you have it wired correctly. I would completely remove the check valve though, and check the air flow. That still could be your problem. If it does get stuck, just backing the check valve out won't unstick it. You will have to replace the check valve.

Travis

[J.Vale' Se' Diez]

Finally got around to checking the voltage and I got 12.2v with it running. Although I did remove the leader hoses from the tank and they seemed to be putting out equal pressure. I then reconnected them "hand tight" and even though I had a small leak at the fitting I was able to achieve a faster fill rate. 150psi @ 5.40min. So now I need to figure out this electrical thing, any suggestions? Getting it up to 13+ volts should get me alot closer to Viairs time, right?
I will be calling you guys tommorrow Travis, Thanks.

[Pro Performance]

I think I may have forgot to mention that the voltage reading is while the engine is running. Check voltage with the engine running, and it should be close to 13.8, which is charging voltage. That should help a little. I don't believe you are too far off from the time it should be, and the 13.8 will speed up the compressors a little, and might put you where you need to be.

Travis

[502ms]

I agree, if truck is off, and compressors are both running, that is a large current draw, and a hair slower on fill time. The better the power source, the better the fill time
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