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Remote Name: 192.168.1.2
Date: 08 Feb 2005
Since the figures are opposite to what I said and I am sure my statement was correct either or both the sets of figures are incorrect. One fact that might make them correct in the 1950's is that the higher temperatures of a competition engine may have demanded a greater contact area so as to improve cooling of the valve face. Alternatively, the higher compression on the engine may have needed the wider face to maintain a seal. Modern valves and hardened seats probably change the values anyway. It is obviously more reliable to have a wider seal than to trim it to almost nothing in an attempt to get more performance. You can afford to cut it fine when you rebuild after every race.