"Newps" wrote in message
. ..


wrote:



...but it does bring up an interesting point. One that I have yet to see
adequately explained anywhere. I've seen a few engine operating curves
that limit max manifold pressure as a function of RPM, there are many
that don't. My fixed-pitch Cherokee doesn't have the option, but I'd be
interested to know any source that explains it adequately.


One of the absolute worst sources of information on how to properly run an
engine is the engine manufacturer. They are utterly uninterested in
proper engine management, only reducing liability and costs. For proper
engine operation you need to talk to the GAMI guys in Ada, OK.

Completely agree!

Quite frankly, from what Deakin points, manufacturers recommend operating in
the worst possible ranges as far as mixture goes, both for ICP and for
fouling. Then they try to claim you didn't follow their directions.

At least TCM is (slowly) getting its act together in the Columbia's 550
series.
--
Matt Barrow
Performance Homes, LLC.
Cheyenne, WY