SBM Edelbrock/Speedmaster Head Data

I’m surprised at how little activity there is, and how it keeps dropping as the lift goes up, in the plane 7 test.
Yet, the 2,3,4, planes are fairly steady with lift increases.

It would be interesting to see how all of that would compare on a port that didn’t have the dip in the curve.
I actually expected plane 6 and plane 1 (on the second row) to react the same as plane 7. I thought the velocity would go to 0 at the seat in all 3 locations. I think it actually does, but I could not get the pitot all the way to the seat. As a matter of fact, at the seat, the flow actually changes directions and is moving up the port at about 170 fps. I measured this with a different pitot in a different test a few weeks ago. I might try that again in the morning.

I may also try taking velocity readings at these same lift points around the guide boss. In this port I have noticed that the guide boss has impacted turbulence/separation more than any other port I have worked on.