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Old 07-17-2020, 05:16 PM   #10
Volvo upgrades
Join Date: Sep 2005
Location: North Wales

The limit with the B20A is the manifold rather than the carb.

You are on the right track for the mid range. C cam, 44mm inlet valves, 10-1 CR ( or a touch higher) and good free flowing exhaust with 2.25 inch working best makes for a nice B20A

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