Correct. Then again, what do some of the other brands look like and do or perform. This is where Tony is making his case. But it is still a stock head which will only perform so well, stock or ported.
The “%” thing you bring up is also a thing to see where the ports are in terms of there flow & balance. If the ports fall short, which in your example of 64% being low, the cam companies in the past introduced the split pattern cam. In which, if the balance is good or over the normally accepted balanced area percentages, less exhaust duration can be used. (More intake duration vs exhaust)
This leaves the question of “Do I need a split duration cam?”
Back to the head topic….
Aftermarket heads having better ports and metal to port address this as well as the porter. If maximum power is the goal, the head porter can have someone weld the floor or wall to create a new port floor or wall to allow a better shape by creating a new port.
So, literally he is welding the port smaller. Or whatever he needs to do to make what he wants. As the pro’s say, shape is everything. So if the port is to low, not high enough, to wide, whip out the welder!
