SBM Edelbrock/Speedmaster Head Data

[PRH]

When dealing with stock or entry level type heads, many times the rest of the port isn’t up to the task.
On that type of head, especially in milder applications, the pinch is not the limiting factor for power production.

 

[273]

When dealing with stock or entry level type heads, many times the rest of the port isn’t up to the task.
On that type of head, especially in milder applications, the pinch is not the limiting factor for power production.

I could see that, the other day was moving stuff around and came across my old J heads and couldn't believe how small the ports are