Ben Hallert wrote:
Hence my question, because if I leave the throttle firewalled in either
the '67 172 (w/ 6 cyl continental) or the 81 Cherokee 161, the needle
WILL pass redline in level flight.

Then don't do that. I've been told that the camshaft is the weak point on the
Lycoming engine. Being familiar with the problem of stuck valves on a
Continental O-200 (which has the same cylinders as the O-300), I expect that the
valves and rockers are the problem area there, but I'm not sure.

In any case, if you routinely exceed redline on the tach, you will learn what
your glide ratio is sooner than later.

George Patterson
Drink is the curse of the land. It makes you quarrel with your neighbor.
It makes you shoot at your landlord. And it makes you miss him.