X-Mozilla-Keys:                                                                                 
Bill Freeman wrote:

                               SNIP

It is very interesting to see those numbers Paul. Almost everybody
advocating water cooled car piston engines assumes BSFC is well below
0.40. Actually water cooling is a drawback as running an engine
at 212 F means  more heat energy is given up to the coolant while
an aircooled aircraft engine will run 300 degrees or above.

This is why most cars use a much higher temperature thermostat than they
did a couple of decades ago.  The standard thermo was 165 or 180F many
yrs ago, most are 192 or higher today.  Fuel efficiency.  Also makes the
radiators a bit smaller & lighter; and reduced inlet cooling flow, incrementally
lower drag, better fuel efficiency,   etc. etc.

Bill

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