Porting cylinder heads generally refers to the manner of enlarging the intake and exhaust ports of an engines cylinder heads. Porting is normally done to exaggeration airflow and horsepower at high rise RPM. Heads with smaller ports - un-ported - normally feather worthier low-end torque than ported heads. Even, there are some porting procedures that can be performed, without significantly enlarging the ports, that Testament consequence in exceeding low-end torque.
Trim the tape with a razor blade so only the chambers are exposed. Use the Dumore flexible shaft grinder setup, felt wheel and rouge, to polish the combustion chamber. This will enhance combustion and prevent carbon buildup in the chamber.
2. Repeat this mechanism with a positive sandpaper bit. Go-ahead the marks the sandpaper makes in the Harbour. Maneuver the bit so the marks site into the Harbour at approximately a 45-degree angle relative to the entrance of the Harbour. This Testament prevent fuel pooling in the ports and impart a "swirl" backlash in the incoming fuel charge.
3. Remove the rough casting marks in the exhaust port with a medium stone, using the Dumore flexible shaft grinder setup. Move to a fine stone. Remove as little material as possible. Polish the exhaust port with a felt wheel, mounted in the Dumore setup. Use jewelers rouge, starting with coarse - black - and moving to red, brown, and finishing with white. This will polish the port to a shiny, almost mirror finish. This will actually aid in the movement of exhaust gasses.
4. Place an old set of valves in the cylinder head. This is to protect the valve seats. Place masking tape on the surface of the cylinder head.
