"Michael Horowitz" wrote in message
...
I'd be interested in any schemes you may have developed for
pre-heating your engine.

One idea I heard was to use flex ducting to direct car exhaust into
the cowling; that does present CO concerns, but on could leave the a/c
doors open. - Mike

Try starting your car, and feeling the temp at the end of the exhaust pipe.
Not too warm. Add to that, the volume is very low, compared to commercial
rapid pre-heaters.

Good attempt, but try again, IMHO.
--
Jim in NC