Matt,  the p intake  port has no more effect on the seals than does

the

peripheral  exhaust port.

Probably less as you don't have hot gases squirting out a tiny initial

slot.

The incoming can help cool the apex seal. Apex seal cooling is a big

issue.

Paul Lamar

Paul and George,

Just for your info. I considered  P ported engines with  turbo

compounding.

Please correct me if I am wrong.... In my understanding the Lemans' P

port

engine's outstanding efficiency  happens as a result of achieving the
correct balance between intake and exhaust forces.  Low  back pressure

high

intake manifold vacuum was discovered through extensive testing.

Emphasis

on the last word.

My source said try the RENESIS would be better at scavenging exhaust gas

and

operating at higher (than 13B) back pressures.

Just out of curiosity.  In trying to make up a 20B RENESIS engine, have

you

given any design thought for what sort of adapter plate would be needed

to

create an intermediate housing out of an side housing?  Perhaps this

idea

suffers from the Dopeler effect:)

Doug in Japan

You got your work cut out for you if you try a 3 rotor side exhaust port.
Big bucks for a new casting as I see it. However the world may beat a path
to your door if you are successful.

Paul Lamar

Doug,
A bit beyond even my thinking about it, at this point in time. I haven't
even seen a intermediate 3 rotor housing - yet!

I could be wrong but I would assume that a direct line PP exhaust would
exit at a higher velocity and it's the high velocity that makes the best
scavenging. I think someone mentioned that the exhaust reaches supersonic
speeds at higher RPM.

They are probably right about the back pressure - but I don't know!
George ( down under)

George,

Yea... the more I study about the different rotaries and listen to the
different opinions the more confused I get. Sort of like herding cats.
At least I am starting to get some concrete answers on ethanol and through
some recent excellent reports from Doug Dempsey starting to understand a
little more about turbo chargers.

Doug in Japan

 
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