Quote:
Originally Posted by Tim Ayers
Interesting. Is there a reason why the refined B&S head/chamber design can't be replicated for a Model A head?
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It has, in a few different heads.
What you need to keep in mind is that the Model "A" engine is different.
B/S ratio, cam timing, ignition etc.
There is no free lunch when you start making these changes.
You also have to realize that when the Model "A" motor was designed, the theory of internal combustion was not well understood. The motor is a compromise of details that would run under many different conditions.
John