wrote

On a
short-field takeoff, usual SOP with an aircraft engine is to lean to
max RPM with the brakes locked and throttle wide open; do that with
the Soob and the valves will burn real quick.

But it isn't normal procedure for an aircraft engine on a normal take-off.
Full rich, unless you are at a pretty high field.

Recognizing that the valves can burn, what's the problem with giving it
enough fuel too keep the temperatures down? If that means you have to set
your minimum field length a little longer, then so be it.

I'm not defending the soob, but it is wise to recognize the shortcomings of
what ever engine you brung, and run it accordingly. You would be hard
pressed to find _any_ engine that does not have weaknesses.
--
Jim in NC