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Oh yeah.... Speaking of crazy, I operate my moped iridium plugs LOP
all the time in my injected, electronic ignition 320. Oh, that's right, it
is below 75% power.
Ya know, fixed spark timing might just be a component of LOP (or
somewhat lean of rich) plug problems (if any).
Aviation - stay in the dark ages and everything will run just as it
used to - sloppy, but it works. Let's see, the price of av gas may soon
exceed the per liter price of potato vodka - an alternative green power source
(or use as a pain(t) remover).
Grayhawk
force shields up....
In a message dated 2/20/2012 2:05:03 P.M. Central Standard Time,
cberland@systems3.net writes:
Paul,
if they have an automotive background, they may have never been exposed to
high power LOP. I clearly remember the first time I was. In
the late ‘80’s I was doing consulting work for Pontiac Motor Sports on their
IMSA GTP cars. We got the fuel injection stuff from Cosworth and
they suggested we run LOP at max power for fuel economy at Daytona. My
reaction was….Are you @*&% crazy….you must be
kidding!
Craig
Berland
The slide was clearly "LOP" and I got the impression they
are savvy enough to understand the difference you mentioned below. I
just did not have time to address the issue with them, but I have his card so
I'll ask what Tempest means.
Paul Miller
On 2012-02-20, at 11:32 AM, Craig Berland.
wrote:
“There was one slide that showed a badly eroded massive and
it was blamed on "severe LOP operation”
Let
me take a stab at this. I suspect what they said or at least meant was,
the badly eroded electrode was caused by severe detonation as a result of lean
operation. What I mean is, if you are at high power and 300-400 degF
Rich of Peak and you lean to 50degF Rich of Peak, you are in what I would call
a severe engine operation zone caused by leaning. That is, you are way too
lean for Rich of Peak operation at high power. If you continue leaning
to 60-100 degF Lean of Peak, you are what I would call a pilot with good
engine mangagement skills. By continuing the leaning process you reduce
peak cylinder pressures and therefore peak temperatures. The likelihood
of detonation increases as temperature and pressure increase. By leaning
to 60-100 degF LOP, you significantly reduce the likelihood of detonation from
the 50 degF ROP setting.
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