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Swaps, Turbos, Buildups / Re: M42 head work
« on: February 23, 2019, 07:09:52 PM »found something interesting on MM heads:
https://patents.google.com/patent/US4976248A/en
its a shame they never did anything to prove the merit. or perhaps they did tests and didnt want to publish results...
having used one of their complete heads i cant really say it performed any better than the tradiional approach.
personally i think the scale and size of the features is too large, a rough texture (burr finish or extremely coarse grit) can be good for wet flow and even dry in some cases this has been tested but you dont reallly need large steps which have the issue of creating dead pockets and hot spots within the chamber...