Quote:
Originally Posted by graham bahr
vehicles with multivalve cylinderheads other than mass production ones as fitted on a factory assembly line, i.e for fords pintos warrier and holbay, for a series engines jack night and KAD heads a 50% multiplication factor will be applied to othe engine capacity,
this is the same rule currently applied to sequential gearboxes and will also be extende tp apply to cars running center lock wheels
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So The 7 & 8 port heads, although aftermarket would not count as heavily
modified because they only have 2 valves per cylinder ?