OK an engineer stepped up to the plate. As I said, I was using a 20 gallon
water tank. Maybe in my case it was cooling too well, therefore the
restriction was needed.
I still want a thermostat. Heat is HP! There is certainly is no advantage to
run an engine under 190 degrees. Strangely, it took many years for the
automotive engineers to realize this. When I was growing up, the CW was to
run a 160 thermostat in the summer and a 180 in the winter. (The heater
wouldn't work with a 160) However, we had a tractor that ran a 180
thermostat year round. Now everything automotive is running about 210
degrees F.
One pound of pressure raises the boiling point of water about 3 degrees. A
20 lb cap will result in a boiling point over 270 degrees and if you are
running coolant (50/50 antifreeze/water) even higher. I know that there is a
limit to how hot you can run safely, but some of our best performance has
been with coolant temps at 250+ degrees.
Tom, Redding CA - #216 D/FCC
------Original Message-------
From: drmayf
Date: 2/14/2008 4:09:38 PM
To: Benn
Cc: LAND SPEED LIST
Subject: Re: [Land-speed] Cooling water velocity, was Electric water pumps
Yes, Benn, I am with you. In fact, I think if you look on Stewart water
pump web site they even explain this ongoing myth. Here is the deal.
Fast water picks up a littl eheat but since th ewater is flowing so fast
The next little increment also picks up the heat until it all is
transferred. The system has to be fairly well designed.
mayf
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