Originally posted by Top Gun 777
It is about right, but you have to remember of resonable limits and balance, meaning if you keep opening to any of the ways trying to achive one of the parameters and cross the limit line.........engine will just stop to perform at all.
Transfer ports have to be at certain opening, to have enough time to transfer all mixture to combustion chamber.
Exhaust opening is more complicated.
-Lower exhasut-longer dwel time-more torq,
-Higher exhaust-smaller dwel time, less torq, but higher RPM.
Also difference between exhaust and transfer will dictate your pipe performance. There were a lot of studies done to find the best suitable difference and so far it is about 40 degrees.
In our aplication a little bit different due to our pipe design ( two cycle).
\ Got to go, will be late.
Didn't finish.
Thanks TG, think you have a plane to catch...we'll keep this interesting class for some other time....good luck...
AFM