Speedmaster Small block porting tips and results Part 1
Without me having both here at the same time to try this on, it’s just speculation on my part......
But I feel like if both heads rec’d the same valve job and bowl blend....... the two heads would flow similarly.
The area where the RPM does require more work is at the port entrance/exit.
There is a noticeable ridge left where the cnc’d opening meets the as cast runner...... and that takes some time to blend away.
There is no such ridge on the SM head.
Without me having both here at the same time to try this on, it’s just speculation on my part......
But I feel like if both heads rec’d the same valve job and bowl blend....... the two heads would flow similarly.
The area where the RPM does require more work is at the port entrance/exit.
There is a noticeable ridge left where the cnc’d opening meets the as cast runner...... and that takes some time to blend away.
There is no such ridge on the SM head.