Best temperature for a running flathead

[hfh]

Thank you all for your comments. I have a 7 lb cap. The fan is on when needed and off when not needed. I like to drive it on country roads here in rural Massachusetts. I am 10 miles from the nearest traffic light.

[G.M.]

Originally Posted by hfh

Thank you all for your comments. I have a 7 lb cap. The fan is on when needed and off when not needed. I like to drive it on country roads here in rural Massachusetts. I am 10 miles from the nearest traffic light.

I would switch to a 4 lb cap which is all you need. I did heat tests here
in SW Florida for a year on the same 40 mile lunch trip on a 4 lane
highway for most of the driving. Wind speed and direction have a lot
to do with cooling. Going into the wind can cool the engine 15 to 20
degrees. G.M.