TF & Speedmaster Flow Tests
Here's a snapshot of the velocities around the intake valve measured from the combustion chamber side at 0.600 lift in both the Speedmaster ported head and the Trick Flow 190 CNC head. For me, the 6 o'clock (short side of port) and 12 o'clock (long side of port) positions were most interesting.
I thought the 6 position in the TF would be much better than the SM. There is no significant difference between the two. As can be seen, the flow is separating from the short side and probably even rolling/reversing direction in both ports.
In both heads the 10:30 position (results not shown) is the strongest flowing, as it should be. The 9 o'clock and 12 o'clock positions should be the next strongest. Not at 12 o'clock in the TF. The 12 position shows the result of the crisscrossing flow in the TF port. The velocity next to the valve seat (313) and the valve face (330) are still pretty good, but they go quite low in between.
I'm not showing this to bash the TF. I'm showing it because of the surprising results and the prior discussions about the purpose of the vein in the TF port. There are areas where the TF was a little better than the SM.
Here's a snapshot of the velocities around the intake valve measured from the combustion chamber side at 0.600 lift in both the Speedmaster ported head and the Trick Flow 190 CNC head. For me, the 6 o'clock (short side of port) and 12 o'clock (long side of port) positions were most interesting.
I thought the 6 position in the TF would be much better than the SM. There is no significant difference between the two. As can be seen, the flow is separating from the short side and probably even rolling/reversing direction in both ports.
In both heads the 10:30 position (results not shown) is the strongest flowing, as it should be. The 9 o'clock and 12 o'clock positions should be the next strongest. Not at 12 o'clock in the TF. The 12 position shows the result of the crisscrossing flow in the TF port. The velocity next to the valve seat (313) and the valve face (330) are still pretty good, but they go quite low in between.
I'm not showing this to bash the TF. I'm showing it because of the surprising results and the prior discussions about the purpose of the vein in the TF port. There are areas where the TF was a little better than the SM.
