On Jan 24, 9:05*pm, "
wrote:
On Jan 24, 12:48*pm, " wrote:

The "vair has a similar tube port. *Some even FLY behind them :-)
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The Corvair exhaust port already points straight down. Plenty of room
on the ends of the heads for fins. On the VW the exhaust port is
horizontal off the end of the head. Converting to a tube-type port
would provide no benefit with regard to added fins. Indeed, the
existing port may be defined as a tube-type, plus having the advantage
(over the Corvair) of two bolts vs one.

While comments are always welcome it helps if both parties have some
experience with the engine(s) in question... Or at least looked at
them. Or whatever. A recent post took me to task for "wasting time"
on the early VW engines when the later model was such an obvious
improvement... failing to take into account the economic factors
involved when dealing with an engine, the parts for which remain in
production. For those who might be interested, converting a Type IV
for flight typically costs about the same (or even more) as
overhauling an A65-O200, since the Porsche-types are willing to pay a
premium for the T4... and do not have the option of installing a
Continental.

-R.S.Hoover