In article ,
Thomas Borchert wrote:

I'm figuring to get a bit more than 300 to 400 hours on my engine.

And the cylinder heads?

I expect to the cylinders to last to TBO as well.

For the higher powered engines we have, a top
overhaul after 400 hours is nothing unusual at all.

I don't have a high power engine, just the 160hp O-320.

With a 1800 or so
hours TBO, if that ain't broken, I don't know what is.

1800 hours TBO is broke? Then we have different ideas
of broke.

note that I figure to reach calender TBO of 12 years before
getting 2000 hours on my freshly overhauled engine.

--
Bob Noel
looking for a sig the lawyers will like