HD Combustion Chamber designs

[alakso]

Mike, would you please give the pros and cons for the following HD combustion chambers designs that are on the market?

Hemi

Bathtub

Pear shaped

Are there any HD combustion chamber designs I've missed?

[Mike]

Again, each has their claim to fame. See my response on previous post about heads. The chamber shape is also influenced by valve angles and piston design.

H-D used the "D" chamber on EV's.