TurbopigB4C

iTrader: (5)

Does everyone just use CNC nowadays to port heads or are there any professional head porters that still do it by hand?

mark21742

i am by NO means a pro, but I hand ported my heads and it made a wold od difference

DietCoke

iTrader: (18)

The best top end heads will be hand-finished every time, but remember that a CNC program is just a copy of a (excellent) hand-made port 99.9% of the time. The biggest advantage of CNC is repeatability and uniformity of ports, notwithstanding the relatively short amount of time a cnc program takes vs hand porting. You aren't going to hand-port 8 identical ports.

chrisfrost

iTrader: (8)

Yes hand porting is very slow , I spent at least 2 months at maybe 2 or 3 hrs a day . I took about .150 off of the exhaust all the way through .I would do it again . Good luck