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Old 02-10-21, 12:43 PM
David C David C is offline
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Join Date: Apr 2021
Posts: 68
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Thank you, Geoff. That should get me to the rolling road without too much incident.

I will be fascinated to discover how similar the curves are between different engines. Even with the same camshaft profile there is likely to be significant variation in compression ratios due to different amounts of head skimming.

I'm no expert but I would guess that as compression ratio increases, less advance is required.

I really don't know where to start with the vacuum advance since the Bristol didn't have the feature originally. I have great hopes that this will offer quite an improvement.
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