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Cylinder Head Porting

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By determining the average velocity within the main body of the port and comparing it with the average velocity at the seat, we can establish at what point the seat priority swaps over to port priority. On this near-stock SB Chevy head we see that until 390 thousandths lift, the seat was actually more important than the port.
Porting Cylinder Heads - Port or Abort?

 By determining the average velocity within the main body of the port and comparing it with the average velocity at the seat, we can establish at what point the seat priority swaps over to port priority. On this near-stock SB Chevy head we see that until 390 thousandths lift, the seat was actually more important than the port.  View Related Article

 

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