On Thu, 28 Sep 2006 08:07:22 -0700, Mark Hansen wrote:

How's this for timing. Mike Busch at AVWeb just wrote a new "The Savvy
Aviator" column on this very topic. Have a look:

http://www.avweb.com/news/savvyaviator/193242-1.html

I'd just read it this morning. It doesn't actually address the aspect
that's leaving me puzzled: how someone can complain about "burning
cylinders" w/o seeing this ahead of time on an engine monitor.

But I think I saw one possible answer in this thread: if detonation is
occurring, EGTs (the metric used because it is quickly responsive to
mixture change) will drop but CHTs will - less quickly - go up. Someone
posted that detonation can ruin a cylinder very quickly (ie. a small
number of minutes, as I interpreted what I read).

So someone might not have evidence of detonation until it is too late.

Is this correct, or have I missed/misunderstood some aspect?

I still don't quite get why LOP would bring on detonation (even after
reading http://www.avweb.com/news/pelican/182132-1.html but I'm still
digesting parts of it).

- Andrew