Quote:
Originally Posted by Bob Verwold
Been there and done that....After several times of forgetting to turn off or on I got the shutoff valve that's wired into the ign . When the ign is off the air is off / ign on air is on and no more forgetting.......... But I'm an old man and have a habit of forgetting.............
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Me three, the switch (Dedenbear #ABSOV) is absolutely the best investment you'll make. Over the winter, I'm also adding a CO2 sensor for the Racepak dash to light a warning light if the bottle's under 500lb... One too many round losses with no air.
I have a 10lb bottle in the trailer and use it to refill the 2lb bottle on the car. CO2 is amazingly cheap, a 10lb bottle exchange at your local welding supply is about $25 (they won't have, fill, or touch your 2lb bottle). And 10lbs is at least a year's worth.
As to the original question, with the nasty leaks you'll end up with, you'll fill it once a weekend. Maybe once a round.
If you manage to make it leak-free, some people go all season on a single 2lb bottle.