Speedmaster Small block porting tips and results Part 1

skrews said

[QUOTE="yellow rose, post: 1972786972, member: 41803"
Used to be when someone said "sink the valve" anyone standing there would go apoplectic, lose all the color in their face and then they'd call a priest in to do an exorcism on you for speaking that voodoo.
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Ain't that the truth. Then you try to explain the virtues of seat profile vs seat height and they stare at you like a deer in the headlights.[/QUOTE]


Yeah...and now you made me rethink my decision. Then I started thinking that no matter what you do, the exit loss at the valve because the chamber is so flat is going to be bad no matter what you do. So I guess I'd rather have the seat/throat/bowl shape I like and live with a bit more exit loss than try to change the seat to try and clean up the mess after the charge gets around the valve.

It's funny...when you look at the TF chamber, and then look at the newest stuff in chambers and you don't see many chambers that are what used to be considered "hard" compact chambers. They are moving towards a much "softer" compact chamber (like the TF) because it still has the same ignition timing requirements but that hard chamber has a much tighter tune up window, among other things...