Morgans wrote:


It is a trick to see if you are overheating, with the typical VW or
Corvair instalation, since most have no way of monitoring CHT, or more
specifically, the valves, seats and guides.


Jim from what I've read (no personal experience!) it is not that difficult
to hook up a cht to a VW and they (whoever they are!) suggest attaching the
sendor near the exhaust valve part of the head and limiting the cht to (I
think) 400 degrees or less. This is the part that limits VW's to less than
40 -45 hp. Of course anything you can do to remove heat faster will let you
run at a higher output. Such as proper baffling and external oil cooler etc
etc. Nothing is wrong with using a VW or Corvair engine but you should be
knowledgable of their limitations!
John

As an aside, both a 1600 and a 2180 VW can put out 40hp continuous if
properly set up but the 2180 will be loafing while doing it at a lower rpm
which will let you use a bigger prop and limit you max rpm.
Life's all a big tradeoff! ;-)