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The M119 is tough as nails, other than these oil bridges and maybe an occasional timing chain tensioner, very little goes wrong, other that the electrical gremlins (throttle motors, maybe a wiring harness or Mass airflow sensor). Nothing with the head I can think of..
Maybe the 400-500hp tuner versions are what I'm thinking of, but I was sure I read about 1000hp, stock "bottom endZ" is what I meant to say, not stock block per se.
YES the aircooled Porsche engine actually was put into a certificated airplane, the Mooney Porsche. Pretty rare, I'll see if I can find a link. I think it needed to have a reduction gearbox to work. The usual problem with using auto engines in aircraft is the prop speeds are way lower than the auto engine will produce any decent power at, so you need to use a reduction gearbox so the prop is spinning the proper speed (they become less efficient if they are over-revved) but the engine is in it's peak rpm range.
Gilly
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