Group, I
really would like to know where the idea that the PP rotary won't idle came
from? This is total baloney. Lynn Hanover has commented several times
that his PP 12A idles just fine. Some carburated engines with unusual
manifolds sometimes have problems. This is true for both PP and side port
engines. Many of the earlier rotary engines used P ports. If and
engine is radically ported in either port type, (just like a radically cammed
piston engine), it can be difficult to make idle. If you keep the port timing
reasonable the engine ?WILL IDLE FINE, especially a EFI engine. The throttle
plates being close to the housings makes things work better. The MB
C111 used various rotary configurations. Most of the engines were peripheral
ported. There was no problem with idle, but the sealing problems of that
era prevented a production version. If your engine is set up carefully
without radical timing idle won't be a problem. The real problems
encountered by many people are caused by large ports and extended port
timings. Bill Jepson Hi, Bill....I got the idea that p-ported
engines would not idle well from Mazda Racing, Mazdatrix, and 5 or 6 other shops
that will p-port an engine. One example of other articles referring to the poor
idle can be seen at
www.monito.com/wankel/porting.html .
I am not making this up....just passing on what I have read from what I thought
to be reputable dealers. Paul Conner
Paul,
all the companies you list sell housings with BIG p - ports and massive
overlap. They are designed to develop tremendous hp at high rpm for racing. Of
course they don't idle smoothly. These engines have nothing to do with the
smaller, conservatively timed p ports that we wish to use as aircraft engines.
Jerry
Paul.
Massive side ports will not idle well
either!
One must compare apples with
apples.
One interesting point is Paul Lamar is
developing 2" P-ports to prove his theory - so we will see what we will
see.
George ( down
under)
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