On Demand Air System Vs. Scuba Tanks

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FS150HZ
Posts: 96
Joined: Fri Jul 15, 2016 12:03 pm
Location: Golden Horseshoe, Ontario

On Demand Air System Vs. Scuba Tanks

Postby FS150HZ » Wed Mar 22, 2017 1:33 pm

Well the time has finally come that I am pursuing upgrading from a pathetic 5 gallon air setup with a Viair 480C compressor.

By coincidence, as soon as I started looking for a new air setup, I checked out Princess Auto (Canadian equivalent of Harbor Freight), and they had some large two stage compressors on sale for just over half price. For the setup I'm looking at to work for large runbys, I would need two of these probably. Both would put out 23cfm at 1200rpm, or 30cfm at 1400. This would run with a 40 gallon tank, and continuously resupply air during the whole recording. 46-60cfm should be easily enough to run a K5LA I'd imagine, maybe even a 3/16" M5. A 420cc (13hp) OHV gas engine I saw was also on sale, which seems appropriate for my setup. Although, it would be nearly be at full power for the time I'm running it. Basically a 4 minute recording, with 2 minutes blast time, which I don't imagine would put too much strain on the engine. Of course, a setup like this would be rather insane, requiring a decent pressure switch, multiple safety blow off valves, and opening the back window to vent the fumes. It would also dampen the experience since the sound of a large gas engine and two compressors going I'm sure would be very loud. Though, I would have a good amount of air available whenever I want, and I can always run the setup on hitch mounted cargo carrier.

I had also considered nitrogen, but as soon as I found out the cost of getting nitrogen tanks filled in Canada, I turned away from that. $45 dollars to fill a 55cf tank is just stupid. I turned to scuba tanks, which seemed much more practical. I can get a cylinder of any size filled for $10 dollars. Or even get my own compressor for $1500. I'd imagine I'd do recordings maybe 30 times a year. Two 100cf cylinders (with a 20 gallon surge tank) would get me 4 minutes of honk time with a K5 maybe? The only issue there is the the honk time is limited if I ever went far from home with the horns, and planned on doing a number of recordings in a single day. I have been leaning towards the gas compressor setup because there are my options with it, but I'm just looking for input because I don't really know what I'm doing. Lol. I may end up being quite disappointed with either setup as I don't really know what to expect, or if I'll do recordings as frequently as I am anticipating.

Input would be greatly appreciated.

Evansville-Antiques
Posts: 399
Joined: Fri Oct 03, 2014 1:12 pm

Re: On Demand Air System Vs. Scuba Tanks

Postby Evansville-Antiques » Thu Feb 08, 2018 1:26 am

i used a shark bite connected refrigerator compressor , aided by my shop compressor , to fill my scuba tank to 1000 psi . i got the fridge compressor for free, and used my previous horn tank to pressurize the input

Evansville-Antiques
Posts: 399
Joined: Fri Oct 03, 2014 1:12 pm

Re: On Demand Air System Vs. Scuba Tanks

Postby Evansville-Antiques » Thu Feb 08, 2018 1:28 am

once you have the right shark bite size , you can also pressurize your vhicle horn tank with your cars AC compressor , with an oil catcher . you will have unlimited air when your car is running

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Tlauden29
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Joined: Fri Oct 20, 2017 10:06 am

Re: On Demand Air System Vs. Scuba Tanks

Postby Tlauden29 » Sun Mar 25, 2018 4:38 pm

A gas compressor would probably be the cheapest in the long run. There will be an upfront cost, but no cost in refilling air (minus a few bucks of gas for the engine). Out of the options you presented, thats the way I would go.

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tdriver113
Posts: 34
Joined: Mon Sep 29, 2014 6:03 pm

Re: On Demand Air System Vs. Scuba Tanks

Postby tdriver113 » Sun May 13, 2018 6:13 pm

Here in US I use nitrogen which I can get refilled for about $20.00. Very cost effective for the price.
Gary.


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