Originally posted by DemonSVT:
Port yes, polish no.
EH does not leave a polished finish nor would you want it to. There are still some small surface imperfections.
The term port & polish is so overused.
The gains you see from polishing a port or combustion chamber are so miniscule compared to the amount of work it takes to do it is not even remotely worth the time or effort. Most of the time the gains can't even be quantified outside a static test on a flow bench. Real worlds numbers show no difference.
IMO CNC machining has replaced "old school" P&P work and if you look at it, it is by no means perfectly smooth.
I concur with this. Mild polishing might be beneficial, but it isn't worth the time and effort to do much more. One of the main reasons that polishing was done in the old days was strictly for the looks. It helped in selling a ported set of heads if they were polished too. It was just a Wow factor.
