I have a Cartech air to water IC. I made a larger resevoir from 3" pvc and capped top and bottom off and added in and out fittings and a fill plug on top ,you can see the flow in the tank circulating.installed near power steering resevoir.The pump I use is for an RV water system that can pump 2 gal a minute,and is fairly large and noisy but has ran fine for over 7 years.I have about a 2 gal capacity.15 psi but need better fuel control(waiting for that great SS exchange) engine can handle 20+ way over built.Use a cooler with a cross flow pattern(EARLS) and not a single tube with a back and forth pattern.