The problem won't be the bottle size - a 10lb bottle is what "most" people use, but there are bigger nitrous bottles.
A true tank (www.masterimagecustoms.com / www.airbagit.com ) will be more versatile as it will have ports for multiple valves. If he insists on a "nitrous" bottle you will want (need) a HiPo valve for your airride application if you want the air to really flow out of the bottle and into the bottle(s).
Oh yea... there is really no such thing as a "nitrous" bottle... the bottles used for SCUBA and nitrous are all industry standard -- same 'born on' date, same manufactures and everything... they are just fitted w/ different valves depending on their intended use.
If I was doing this I'd grab a coupla OLD style Holley NOS bottles for this application as their nozzles outflow a lot of the newer non-HiPo valves. Also any bottle over 5 years I'd get the valve recertified... most SCUBA shops charge about $50 for this, but the Atlanta area shops will prob send the bottle here... and you can work w/ these guys directly w/out going through a scuba shop.
Precision Hydro Testing
252 Swanson DrLawrenceville, GA 30043
(770) 338-0865






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