The reason they were here was to cut the intake seats to restore the valve tip heights to what they’re supposed to be.
Larger intake valves had been installed and the new valves were sitting a fair amount proud in the chamber, and the installed height was a solid .030-.035 short........ and that extra height was needed for the cam/spring combo.
Without doing something to compensate for sinking the valve into the chamber that much........it almost always reduces the flow in the lower lifts........ and this situation was no exception.
After recutting the seat, and just doing a minimal amount of deburring the new “lip” that was now around the intake seat resulted in this:
