tree monkey
Addicted to ArboristSite
Perhaps were not talking about the same kind of dome. I'm referring to the dome type pistons you find in motorcycles, that is, a slow curve on the top of the piston.
If you take a look at Blair's work, you will see a graph of the actual flow directions of the ports. The transfer flows tend to naturally flow upward from the port angles by about another 15 degrees. The up angle is even more when the port first opens. The same thing exists for the back angle, the actual flow is more towards the back of the port than the port angle.
what was done in the 70's and what is done today are 2 different things. i've read blair's and jenning
s books. i also have porting software that says thay were not always right. but still worth reading