Thanks for the response, a detailed article would be great.
You are right about the subject not being given the coverage it deserves.
I have read everything I can find on the subject several times. My reference
was to something on two strokes only because that is one of the clearest
writings on turbulence and combustion.
With my last engine I utilized something from days gone by when top level
racers ran big dome pistons to fill tall chambers. They had found that
directing squish action into the roof of the chamber eliminated combustion
problems associated with the dome obstruction.
What I did was use a 0.160" tall dome shaped to mirror the combustion
chamber near the plug side squish zone. This small dome acts as a ramp
to redirect the squish action into the spark plug area. The results were
outstanding, ignition advance requirements at low RPM reduced by 10 degrees.
Here's a crude drawing of what was done.
