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Posted : 22/12/2025 11:50 am
AIUI, the rules about the compression ratio haven't changed, apart from a lower CR due to the sustainable fuels. The CR is measured at ambient temperature, which is really the only practical way to do it.
As I mentioned, Buchan's video explains this a lot better than I can, and has screenshots of the rules in question showing the change:
Posted : 22/12/2025 11:51 am
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