Well, basically, I'm just wondering why people haven't started porting irons with CNC to get more accurite and consistent porting jobs done. Additionally, why take the risk of ruining an iron by a little slip-up of the bit popping out of the port or cutting too deep?



Just morbid curiosity!



https://www.nopistons.com/forums/pub...1047683329.gif

because every housing is different you can't port them all the exact same way

JHB in Canada here is setting up a program to do porting with a CNC machine.

That is really interesting https://www.nopistons.com/forums/pub...DIR#>/wink.png Would that bring porting prices down ? mm....

Good luck.



B

JHB actually already does CNC porting, the ports look decent too.



kevin.

To the people on here who know how to do it. There really isn't much guess work. To those who don't have enough to pay those who know, their price is guesswork.

A shop with a CNC mill around here said they could do it, but the cost and time of the setup just isnt worth it, unless you are an engine builder by trade (or blow up engines on a regular basis https://www.nopistons.com/forums/pub...IR)

[quote name='BDC' date='May 15 2005, 10:29 AM']Good luck.



B


[/quote]



Oh come on lol!!

[quote name='R.P.M.' date='May 16 2005, 12:55 AM']Oh come on lol!!


[/quote]





What? I still agree with BDC. CNC porting for boinger heads is an economical way to get a good port job. But it still has to be smoothed by hand to remove the CNC marks(because its faster than having the CNC machine take out its maching marks). But all the top port jobs are still done by hand. The CNC ports excel in their repeatability, but they are only as good as the person programming them. Ever notice all the race heads for piston engines are hand ported? Even with the prominence of CNC ported heads?