|
|
Posted for Hal Woodruff <experimental.aviator@verizon.net>:
Its really hard to tell what power you're developing by only stating 21
gal/hr without mentioning the man. pressure and the RPMs. But its sounds
like you're running rich of peak but not by much and certainly not rich
enough. This could be a dangerous place to run your engine and 1625°F
sounds like its way too hot!!!
If you're wanting to lean then try 29" MP, 2400 RPM and lean to about 1500°
on the hottest cylinder. This will be about 65% power and a reasonable temp
for the EGT and will keep your engine temps at reasonable levels. It may
take an extra minute in your short trip but in the long run will help you
get there every time. These are good numbers for the long trips too. Keep
it cool and it'll run for a long time. Running at high temps is a
prescription for detonation and/or pre-ignition. Don't go there.
You might consider contacting the GAMI people (www.gami.com) and check out
some of their literature. Also, John Deakin has a series in AVWEB entitled
"Those Fire Breathing Turbos" that you should read. Great stuff on engine
management. And then ultimately, spend 2.5 days with the folks at
www.advancedpilot.com and learn all about your engine - unlearn stuff that
you've learned previously that's dangerous to your health. If this sounds
like a commercial then so be it. I just got back from the seminar and I
learned things about engine management, things that I had been taught years
ago, that turn out to be old wives tales, anecdotal, and down-right
dangerous.
Between long flights I am doing a lot of short ones between San Juan
Puerto Rico and the west coast of the island. Only 60 miles. I fly the
distance between 2,000 and 3,000. The flight is only 17 minutes long in
my IVP. What is the best engine management procedure for this kind of flying.
Should I run mixture rich all the time? Should I lean?
I have been flying the short leg pulling mixture back to 21 gallons ph
showing 1625 EGT.
|
|