grobbins wrote:

Seems that the stiffness of the end housings would suffer.
2 parallel walls, 1-1/2" apart and cast as one piece, has to be stiffer than a 2pc
design.

Steel is three times stiffer than aluminum and twice as stiff as cast iron.

Would internal pressures dynamically warp, or "oil can", the steel with an open
sided, cast aluminum side housing ?

You are not going to oil can a crescent shaped  piece of 1/8 thick steel 
three inches wide at it widest point and six inches long with combustion
pressure. Besides that it is supported by the required water jacket
baffles.

On the other hand, don't listen to me. A lot of great things have been done by
guys that didn't know that they couldn't be done.  : )

Grant

Sounds like me my entire life.

Paul Lamar
 
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