I was in the pits at Daytona once and asked all the stupid questions I could remember about everything they did.
From what I remember the water wetter was one of the few things they could run through the engine. NASCAR was afraid of a hose letting go and having the anti-freeze (very slippery) all over the track. The anti-freeze is a pain in the neck to clean up as it does not evaporate like water wetter and water.
Also if it's good enough to run 500 miles at full speed in an engine that costs big bucks, then it's good enough for my measly 302.
I also watched them take apart a water pump while I was there. The pump vanes had an aluminum disk similar to the one Flow Kooler makes in the Summitt catalog. This was done to increase the efficiency and to reduce cavitation. (I have one in my H20 pump just like Nascar!
[ June 18, 2002, 11:34 PM: Message edited by: Mad Max ]