Did you DIY your water cooling system?

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Angular, that"s a very clean setup, nicely done. Where is that little radiator from? And is that quart jug in back the reservoir?

Here's some info on my set up...

Heat exchanger (radiator):

http://www.summitracing.com/parts/DER-13300/

Procon carbonator pump (part # 111A100F11AA) and it's rated at 100 GPH (@ 100 PSI) or about 1.67 GPM.

http://cgi.ebay.com/ws/eBayISAPI.dll...m=230582068842

The internal bypass valve on the pump doesn't seem to go low enough (without completely unthreading), so I'm using an adjustable relief valve to bleed off excess pressure.

http://www.mcmaster.com/#8088k14

That relief valve is actually pretty nice for the money and easy to adjust by hand, so I'm glad I got it. Excess flow from the pump gets routed through the heat exchanger, so would I imagine around 1.5 gallons per minute are flowing through it at all times.

Pump motor:

http://www.grainger.com/Grainger/MAR...p-Motors-5XB85

Reservoir:

http://www.suremarineservice.com/001-395.aspx

Reservoir is maybe 2 quarts. Worst part is not the volume it holds but the the barb fittings being pretty small so the return flow really "jets" into the tank and tends to foam things up. Overall I would say this cooler is massive overkill for my use!

EDIT: Let me just reiterate this very important point...

The Everlast W300 cooler is a very nice unit for the money and it would be a serious challenge to build something as polished or "turn key" as that for $400. I really hesitate to encourage people to go down the path I went because it's a slippery slope and not really cheaper in the end (if time invested counts for anything). If you're a hardcore DIY type and enjoy this sort of thing, that's cool, but the only real advantage to my setup at this point is a pressure gauge and adjustable pressure regulator.