Roger wrote:
: Maybe a cht would help. I think the egt on a carburetor engine isn't much
: help. I had a Westach 4 probe EGT on my C150 and found that it didn't help
: any except to verify that standard look and listen method was working just
: as well. I removed it to put a clock back in the hole. For sale if you
: want to try it. BTW I did the Holly Run one year to Tangier Island and many
: of the small planes with carburetors had to make the flight with carb heat.
: I leaned the engine while using full heat. The engine went to TBO without
: any burned valves.

For cruise leaning, I'll pretty much agree. I put a 4-probe EGT on my PA-28,
but like you say, it generally just will verify that the lean&listen approach works
(or doesn't). One way you may may make it more useful is to play with the carb heat
trick of getting a more even air/fuel distribution. With my analog gauges that's not
really possible, but for a digital readout it may be more useful.

For the lean in a climb, I still think it's *quite* useful... even on carb'd
engines.

-Cory

--

************************************************** ***********************
* Cory Papenfuss *
* Electrical Engineering candidate Ph.D. graduate student *
* Virginia Polytechnic Institute and State University *
************************************************** ***********************