SM Head Modifications on a budget

PRH said
My next step would be a quick and easy one…….

Clay in the sharp corner in the chamber that was left by the edge of the 15* cutter……..so it’s like the cut was made with a blade that had a radius on the OD.
It probably won’t do anything at this point, but it would be nice to have the chamber form more “correct” moving forward.

My take on where it’s at right now is……… the SSR is still in control at the higher lifts.

Here's a test with the inside corner filled in with clay at a radius of 0.2". This was somewhat beneficial at low lifts and again at high lifts. At 0.500" lift it appears to hurt flow, but that is somewhat misleading. At 0.500" lift the air flow is right at the point of separating from the short side. As a matter of fact, the manometer fluid is bouncing around quite a bit at this point as flow separates and reattaches. If anything, the sharp corners are helping flow stay attached a little longer so the cfm hits 265 vs the 260 for the clay radius port. I like the look of the radiused inside corner curve better. Average cfm over the range is better as well.