porting a head

[HOTHOUSE GREEN GEMI]

ok a technique i used and shall i say anyone diy your head should take note if u are following whats in the work shop add this to it when finished porting your head slide you valves back up (make sure you blow the guides out first and oil them use some patrolium jelly and smear some on the valve seat be carefull with this not to go out side the port this will put your reading out. Now make sure your valves and tight and atleast liquid tight. Not get and acurate messureing cylinder and fill to 100ml with metho or petrol. Now DONT SPILL ANY IF YOU DO START OVER. Fill your first port and measure how much fluid you use for each port the point to this is to try and even the port out as much as possible even size even gas flow or vapor flow You can use this or not but atleast you know you head ports are the same size