If an engine conversion to 8.5:1 compression ratio pistons was not approved by Lycoming, the conversion to 9.5:1 in your engine is adding insult to injury.
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by General Aviation News Staff | Oct 21, 2021 | 20211104, Ask Paul, Aviation News, Engines, General Aviation, Lycoming, Opinion | 0 comments
If an engine conversion to 8.5:1 compression ratio pistons was not approved by Lycoming, the conversion to 9.5:1 in your engine is adding insult to injury.
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