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6 cyl Bristol cars Type 400 to 406 - restoration, repair, maintenance etc

Bristol engine Rocker arm ratio

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Old 16-11-17, 08:02 PM
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Default Bristol engine Rocker arm ratio
Has anyone ever calculated the Rocker arm ratio on the Bristol engine. I am specifically talking about the BS1MkII but I don't think there are any basic differences in the architecture of the Bristol engines.
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Old 17-11-17, 12:16 PM
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412usa,
The rocker ratio is 1.5 to 1.0 .
So for example the cam lobe lift is .200 inch , the valve lift will be .300 less the valve clearance .

Geoff
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Old 18-11-17, 07:47 PM
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Thanks Geoff. Much appreciated.
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