I read some article a while back that discussed Mazda trying both side and pports. The idea was to use the side ports for low RPM for better torque. Then they closed the side ports and opened the pports for high RPM for more power. Sounds good but the practical application was not that benneficial.

Dale Davies

The AIXRO has both side port and a P-port.

Paul Lamar

The Rotary Engine free News Letter. Powered by Linux. If you want off
the list PLEASE let me know and I will remove  you.  ACRE NL web
site. http://www.rotaryeng.net You Tube http://tinyurl.com/beqqxas
Copyright 1998-2017 All world wide rights reserved.