AFR Heads

Go back and read through his posts. He reported that the flow numbers out of the box on the head he tested were inconsistent, with one port even falling very short, relatively speaking, from the others on the same head.
This is correct. PBR and I both had the same experience and pretty much the same flow numbers on the TFs. One port would flow 285 with lots of turbulence/separation. Another port would flow 295. I have had one port on one test reach 300. I believe that John could spend 8-10 minutes working on a port and get it in the 300-305 range pretty consistently.