Why is LOP (lean of peak) controversial?

They are.

Karl
wrote in message
ps.com...

I'm not doubting your numbers-but am not sure if the LOP people are
still using 14.9 HP/G.

One fly in the ointment for safe leaning is the likelihood of mechanical
tachs not telling the truth. When my mechanical tach says 2400 RPM, my
handheld optical tach tells me 2480. One of these days I'll replace that
old analog tach with an ignition based instrument.

--
Best Regards,
Mike

http://photoshow.comcast.net/mikenoel

"Peter R." wrote in message
...
" wrote:

If your CHT's are closer to 300 F than 400 F running those settings,
you've got one of the "cooler" installations that I've ever heard of...

The cylinders are new Superior Millennium cylinders with about 250 hours
on
them, if that has anything to do with the cooler temperatures.

And yes, my engine's CHTs are normally below or around 300 and have never
approached 400, routinely. If you would like some verification of this, I
would be happy to upload my engine monitor data (from several months ago,
I
have yet to download a current set), which is in the latest JPI format, to
a free host site for anyone's perusal.

--
Peter

Peter R. wrote:
" wrote:


If your CHT's are closer to 300 F than 400 F running those settings,
you've got one of the "cooler" installations that I've ever heard of...


The cylinders are new Superior Millennium cylinders with about 250 hours on
them, if that has anything to do with the cooler temperatures.

Hey, I have Superior Milleniums on my Bo too. Bet you didn't get yours
for free like I did.




And yes, my engine's CHTs are normally below or around 300 and have never
approached 400, routinely.

I would have to work to get my CHT's anywhere near 400.

"Newps" wrote in message
. ..


Peter R. wrote:
" wrote:


If your CHT's are closer to 300 F than 400 F running those settings,
you've got one of the "cooler" installations that I've ever heard of...

Quite! I have SM's in my TNIO-550 (albeit they have over 1700 hours, but
they are not markedly different than when they were new) and they typically
run about 340-360 with a very occasional high of 380.

Quite interesting how is are not only low, but verging on cold. :~)



The cylinders are new Superior Millennium cylinders with about 250 hours
on
them, if that has anything to do with the cooler temperatures.

Hey, I have Superior Milleniums on my Bo too. Bet you didn't get yours
for free like I did.

Weren't you having trouble with the folks at Millennium? What's the poop?

Newps wrote:

I would have to work to get my CHT's anywhere near 400.

What do you see routinely during cruise?

--
Peter