The test will answer that. I'd be curious what the cycle time on his empty tank to 150psi. Maybe @Apparition can post that with the results, it'll be fun to see what the numbers are. As far as overthinking, Jeep over analyzing is much more fun than some of the alternatives.
OBA tank vs no tank: How long does it take to fill your tires?
- Thread starter jjvw
- Start date
I'm stealing that.....
The one's we rented were a V-8 and 4 cylinders were for the compressor and 4 were the engine.
But this was in the 70's also.
Yes I'm OLD.
Here's another one to test: tank valved in, but at nominal tire pressure. How much longer does it take to fill both the tire AND the tank?
Haha. Those were screamers. I had a V6 that had the same. Unreal CFM.
It really isn't rocket science. If you have a tank and start with it full, the only time you get for "free" is how long it is from the time you clip the air chuck onto the valve stem until the compressor turns on. Once the compress turns on, you are fully running at exactly the same fill rate that you would have with no tank since you are running fully off the compressor fill rate and the tank is doing nothing but acting like a fat air line.
I get what Blaine is saying. He is assuming a lot of details, which are up to the individual. When I’m done filling TIRES, I shut off the compressor with a toggle switch. I may or may not turn it back on for a fill later. My system holds to 100 psi for weeks if I do fill it.
I was joking with JJVW about lollygagging between tires. It is usually half minute if I fumble with the valve cap.
If your system is equalized after one tire, skip the tank. It does nothing. If you still have even 50lbs when you have filled the first, it is helping.
I should add that I use the power tank monster filler. It will reveal weakness in a OBA system.
Blaine is correct, it is not rocket science.
I don't have OBA but I'm assuming the compressor clicks on when the tank is probably what, 90psi? There's still air there that's moving into the tire at a faster rate than what the compressor would be putting in if the tank had equalized. I think in principle we all agree, I just think the tipping point is when the tank has equalized, not when the compressor clicks on.
For the amount of time and money to install a tank for, subjectively, minimal gains one might be better served purchasing one of the high CFM compressors. If those 5.789543231 minutes at the end of the day are deemed that valuable.
That is exactly the entire point. Whether it is a large high CFM or minimal like the ARB mini, the tank makes no difference due to the amount of time it takes between the time you clip on the air chuck until the compressor starts. Once the compressor starts, you are filling at whatever CFM the compressor output is.
What tank that we fill with an OBA system in a Jeep will hold 1 minute of air into a tire?
I rigged up an OBA set years ago using some masterflow compressors I had lying around. Imo adding a tank just creates more potential for leaks and things to go wrong. Especially if you are hammering on rocks all day.
Fwiw I tested one of these against my co2 tank and it was pretty quick. I was surprised the duty cycle was that high given the price.
https://www.napaonline.com/en/p/BK_...z4yIJ5bJSTcDX54NcR68-1636143162-0-gaNycGzNDaU
Fwiw I tested one of these against my co2 tank and it was pretty quick. I was surprised the duty cycle was that high given the price.
https://www.napaonline.com/en/p/BK_...z4yIJ5bJSTcDX54NcR68-1636143162-0-gaNycGzNDaU
Absolutely for a 6cfm differential. Skip the tank. If your running a air locker, maybe just a pint accumulator.
What if the tank is not in line to the tire?
Edited
Wouldn't it be better to have it plumbed separately off a manifold so it can be isolated? Which makes all this moot.
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