"Jon Woellhaf" wrote in message
. ..
"Newps" wrote
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This years compression check...every cylinder 80/80.

How is that possible?

It's possible by NOT putting wear and stress on the rings, pistons, valves,
valve seats/guides, etc.

One thing about LOP is that not only do you NOT get lead fouling, your
cylinders have less internal pressure (and what pressure you do have is at
an optimal point in the pistons travel (you have a nice, smooth ignition at
the optimal point, not at a point where you put more stress on the
components).

When I traded in my TNIO-550 engined B36, it had 1816 hours since TBO
(recommended TBO is 1700 hrs) and the compressions were all 74-78 except
one cylinder that was 72. That 1800+ hours was all done within the past 4
1/2 years -- one thing that's deadly for engines is just sitting on the
ramp.