"Peter Dohm" wrote

I always tend to think of these little engines in terms of installing them
in go-fast machines, for their power. To me, that means turning a 52 inch
propeller about 3500 to 3600 rpm.

Willim Wynne does not reccomend turning the Corvair engine at more than 3000
RPM, and pretty much says right out, that doing so has been shown to break
the crank, in all of the cases he has studied.

So 95 to 100 hp may not be all that
crazy--especially with a rear drive installation such as offered by Great
Plains for their VW based engines.

Some pretty experienced people (in VW engines) have said that the valves are
the weak link, and that much more that 45 HP will melt the valves down, if
run at that level for more than a few minutes.
--
Jim in NC