Leaning Procedure for a Carbureted 182

John,

Uhm, no, not at all. He'd have to be concerned to run not lean enough,
actually, since the temps decrease again when running leaner and leaner.
The point is: You have to worry to run at the right point in relation to
peak.

I don't fully agree with that. The O-470 is normally aspirated rather
than injected; without a tuned intake, the mixture arriving at each
cylinder is going to be more varied; it is likely that you may have one
or two cylinders lean, one or two cylinders rich and two cylinders in
the worst part of the pressure curve.


Not sure at what point we disagree.

--
Thomas Borchert (EDDH)

"Thomas Borchert" wrote in message
...

Uhm, no, not at all. He'd have to be concerned to run not lean enough,
actually, since the temps decrease again when running leaner and leaner.

....and the effects of increased oxidative attack on the exhaust negates the
so-called advantage of low temps. In addition, TBO advisor adds that "very
little cooling effect is coming from the fuel itself, so CHT does not
respond in quite the same way you'd expect." Running lean of peak also
results in reduced performance, rough engine operation in many cases and
shortened TBO due to the above-mentioned oxidative attack of exhaust and
combustion chamber components. Running lean of peak also has another side
effect, increase in oil acidity, which causes oxidation in engine internal
components (same thing happens if you don't operate the engine often enough
to burn off any condensation in the oil). At lean of peak, exhaust gases
are rich in oxides of nitrogen, which mix with moisture to create nitric
acid, which happens to be extremely corrosive. In addition, TBO Advisor says
there is direct evidence documenting a relationship between ntric acid and
camshaft wear. Because of this, they recommend that if you're going to
operate your engine at best economy mix, lean of peak, then change your oil
every 25 to 50 hours (preferably closer to 25). This method is specifically
not recommended for TSIO-360 series, O-470 and IO-470 series and several
other series and models of engines.

Juan,

Running lean of peak also
results in reduced performance, rough engine operation in many cases and
shortened TBO due to the above-mentioned oxidative attack of exhaust and
combustion chamber components. Running lean of peak also has another side
effect, increase in oil acidity, which causes oxidation in engine internal
components (same thing happens if you don't operate the engine often enough
to burn off any condensation in the oil).


Care to back these statements up with numbers?

--
Thomas Borchert (EDDH)

"Thomas Borchert" wrote in message
...
Juan,

Running lean of peak also
results in reduced performance, rough engine operation in many cases and
shortened TBO due to the above-mentioned oxidative attack of exhaust and
combustion chamber components. Running lean of peak also has another side
effect, increase in oil acidity, which causes oxidation in engine
internal
components (same thing happens if you don't operate the engine often
enough
to burn off any condensation in the oil).


Care to back these statements up with numbers?

Don't need to, Kas Thomas and the manufacturers and engineers who analyze
this sort of thing already did. You got any evidence to the contrary other
than digital saliva, go ahead and show it. Get yourself a copy of 101+ Ways
to Extend The Life Of Your Engine and educate yourself, Thomas.

Juan,

You got any evidence to the contrary other
than digital saliva, go ahead and show it.


http://www.gami.com/frames.htm

Your god is Kas Thomas. Mine isn't ;-)

--
Thomas Borchert (EDDH)

"Thomas Borchert" wrote in message
...
Juan,

You got any evidence to the contrary other
than digital saliva, go ahead and show it.


http://www.gami.com/frames.htm

Your god is Kas Thomas. Mine isn't ;-)

Then talk to your priest and switch bibles, kiddo, because the data on this
web does not support your assertions. It's not even close. Heck, you didn't
even bother to check to see if the engine that is the subject of this thread
is on the approved list for the GAMI products!

Sorry to shoot you down like that, but that's what happens when you don't do
your homework.

Juan

Juan,

Then talk to your priest and switch bibles, kiddo,

"Kiddo", huh? So now all you have left is to become condescending? Usenet is
just so much fun.

because the data on this
web does not support your assertions. It's not even close.

Guess you need reading lessons, kiddo (see, I can do it, too).

Heck, you didn't
even bother to check to see if the engine that is the subject of this thread
is on the approved list for the GAMI products!

The subject of the thread went from a specific engine to general leaning
procedures real quick (read it). I NEVEr claimed that GAMIjectors were for
O-470s. The general principles still hold. And your claim of "richer is cooler"
is still not true.


Sorry to shoot you down like that,

Excuse me?

--
Thomas Borchert (EDDH)