Also may be related to DOHC config with total of 2 valves/cyl. Once you maximize valve diameters you end up needing to locate the plug off to one side or the other, so might as well do both sides.gruntguru wrote:Interesting engine. It seems to have two spark plugs per cylinder so probably very high B/S ratio. Wide Vee angle too, 90 or 120 perhaps?
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