Quote:
Originally Posted by nkaminar
I agree that it is not a Model A. But it is interesting from an engineering perspective. Thank you Updraught for sharing. I am wondering what that streamliner would do with 40 horsepower.
The 3 valves in the head is a great idea. It provides a lot of valve area without crowding and places the spark plug in the center of a mostly hemispherical combustion chamber. The lobes on the camshafts are extreme.
Regarding the original question, the Burtz block was not designed for 6,500 rpm. It would take shorter connecting rods for one thing. Plus they did some modifications to keep the block together. As he said the Model A block is as breakable as a potato chip (when putting out 300 horsepower). And then there is the basic question of when is a Model A not a Model A.
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The big advantage of the three valve design over the 4 valve is that it leaves room for two sparkplugs.
The Model "A/B" basic design/layout is not performance oriented. The long stroke, small bore and narrow bore spacing all contribute to limited performance. Shorter rods will not help in extending the RPM range, but a shorter stroke will. Pete mentions doing this, some have gone further.
John