Quote:
Originally Posted by Frank Lee
I don't recall where, but someone once provided a link to an engineering text that mentioned 1000-1200 ft/mn as optimal piston speed for economy.
My question is, is that true and why is it?
Why wouldn't, say, 700-840 ft/mn be even better?
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I recall the same. At the time, I did the calcs for my engine and came up with the same RPM at which my best, constant FE is supposed to occur, which it, indeed, does:
1714 RPM @ 42.5 MPH (4th gear, Full TC lockup)
Here is a
link to an article on it.
The text may hold some advice on the slower speed question.
RH77