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.
Source: general aviationAsk Paul: Adding insult to injury
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.
Source: general aviationAsk Paul: Adding insult to injury