SBM Edelbrock/Speedmaster Head Data
Here is some more velocity data. Sorry for the confusing format. This is just the best way I have figured out to use the software for my purposes. The circles mean nothing. They do not represent the perimeter of the port or the valve.
Here's the way to read this. Plane 1 is a pitot tube location - the center of the port at the pushrod pinch. At that location, the velocity was measured at 5 different lift points - 0.500", 0.550", 0.600", 0.650" and 0.700". Around the circle the valve lift positions are shown in red. The velocity at that lift is printed within the shaded portion of the circle.
For plane 2, the pitot tube was moved to the floor of the apex on the common wall side. Velocity readings were again taken at the 5 lift points. Planes 2-4 are on the apex floor. Plane 5 is the center of the port just above the apex. Planes 6-7 and plane 1 on the second row are all using a pitot tube that was bent (photo 3) to reach around the SSR to take velocity readings at or near the valve seat.
Flows are approx as follows:
0.500 lift - 302 cfm
0.550 lift - 309 cfm
0.600 lift - 305-313 cfm
0.650 lift - 300 cfm
0.700 lift - 304 cfm
As can be seen in the pictures, a jig was used to try to keep the pitot in a consistent location as the lift points were changed.
I am interested to hear everyone's feedback. I have some thoughts, but I'll hold them for a while so I don't influence your opinions.
Here is some more velocity data. Sorry for the confusing format. This is just the best way I have figured out to use the software for my purposes. The circles mean nothing. They do not represent the perimeter of the port or the valve.
Here's the way to read this. Plane 1 is a pitot tube location - the center of the port at the pushrod pinch. At that location, the velocity was measured at 5 different lift points - 0.500", 0.550", 0.600", 0.650" and 0.700". Around the circle the valve lift positions are shown in red. The velocity at that lift is printed within the shaded portion of the circle.
For plane 2, the pitot tube was moved to the floor of the apex on the common wall side. Velocity readings were again taken at the 5 lift points. Planes 2-4 are on the apex floor. Plane 5 is the center of the port just above the apex. Planes 6-7 and plane 1 on the second row are all using a pitot tube that was bent (photo 3) to reach around the SSR to take velocity readings at or near the valve seat.
Flows are approx as follows:
0.500 lift - 302 cfm
0.550 lift - 309 cfm
0.600 lift - 305-313 cfm
0.650 lift - 300 cfm
0.700 lift - 304 cfm
As can be seen in the pictures, a jig was used to try to keep the pitot in a consistent location as the lift points were changed.
I am interested to hear everyone's feedback. I have some thoughts, but I'll hold them for a while so I don't influence your opinions.