SM Head Modifications on a budget
Here's some preliminary information. From the factory with 2.02 valves, the throat measures 1.820 wide and 1.825 deep. We'll call the throat 1.823 diameter which is 90.2% of 2.02. The pushrod pinch measures 0.935 wide x 2.08 tall which is an area of 1.945 in². I'll try to remember to measure the port volume before grinding on anything.
Here's some preliminary information. From the factory with 2.02 valves, the throat measures 1.820 wide and 1.825 deep. We'll call the throat 1.823 diameter which is 90.2% of 2.02. The pushrod pinch measures 0.935 wide x 2.08 tall which is an area of 1.945 in². I'll try to remember to measure the port volume before grinding on anything.