ok heres what I did. I took a clear piece of packing tape. I placed it on the inside of the cylinder wall so it covers the port and follows the contour of the cylinder wall. I then used a graduated syringe to fill the port with water till it reached the top just even with the base of the cylinder.

As far as what port volume does thats what i would like to know. it would seem that if it had a larger port volume then it would flow more air. this may not be the case though as it will flow in a larger port in a slower velocity. larger not always better.


again on the ignition so if your pulling it through by hand to set the timming then it will fire at full advance right? that would be the point of setting it to where it fires at 28-30 deg btdc right?