The flow bench that my heads were flowed on is an older SF-110 model. I think the cylinder bore size was only 4.25". Not sure what entry radius, if any was used? I have had 4 heads flowed on that machine, so I just compare what the different heads flowed, and the last 3 seemed reasonable, if not a bit low. The last head flowed at that shop were the Trick Flow 240's and the results were all messed up, not sure if something was going wrong with the test or machine, but the numbers were way low. Took the heads to another shop with a newer SF-1020 flow bench and the flow results were very close to the advertised ratings from Trick Flow.
