In a message dated 6/18/2007 9:42:52 A.M. Eastern Daylight Time,
eanderson@carolina.rr.com writes:
On 6/18/07, Mark Steitle
<msteitle@gmail.com> wrote:
Well Ed,
It looks like you've got yourself a new intake project. Didn't
Richard Sohn try running side and peripheral intake porting on his one
rotor? I vaguely remember him mentioning it and that he abandoned
the idea. I think it had something to do with the complexity of
the dual runners and that he was satisfied with the idle characteristics of
the p-port? Maybe Richard can comment?
Mark S.
I have never seen a 6 port in road racing. Only 4 ports with bridge ports
or periphery ports.
Too much port and runner cross section reduces velocity and moves peak
power way up the RPM band.
Porting is used to change timing, like changing cams. The
smallest runners and port faces have the highest velocity.
Better idle great mid range and good peak HP at a lower RPM.
For any fixed RPM, the higher velocity gets in more mixture than a lower
velocity.
Every day some kid grinds up some huge ports for his rotary and ends up
with a dog of a street engine. Less HP than the stock engine.
You cannot fool mother nature, or Bernoulli.
Lynn E. Hanover