Rotary engine porting is the key to making efficient power.  There are lots of options available, and the page is dedicated to showing the basic port jobs that most people have.

At left is a typical street port; right is the stock port for comparison.

Typical mild bridge port - bridge is for corner seal riding on rotor

Mild bridge port showing back-cut profile

Serious bridge port, also known as a J-bridge or auxiliary (bridge) port

Stock rotor housing on left; peripheral port rotor housing on right

Prepped side housing for peripheral port engine showing blocked stock intake port

Questions?  Comments?  Send email to: