......The cooling effects of the oil are more limited with less flow.  There is a squirt tube that directs an oil on the bottom of each piston and excess flow to the valve mechanism helps cool the cylinder heads.  I know  the oil carries a fair portion of the cooling load but have no data or numbers.

Mark,

 

Hmmmm....  I can't find the reference on this "vacation" laptop, but I seem to remember that for all the heat (BTUs) generated by an air-cooled internal combustion engine about 8-10% is removed by oil, 10-12% by cooling air and the rest goes out to the exhaust pipe(s).  I guess that makes the oil contribute about 40% of the cooling that we have some control over (assuming A/F mixture is at best power).

 

Implication for me:  Maybe I could reduce cooling drag by improving (read make larger) my oil cooler?????????????  For you: Forgetaboutit!

 

Grayhawk

 

"Precision" measurement is useful for some of the people some of the time.