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Originally Posted by waxdass
lol agree with ur point, this has nothing to do with laminar - then why whip out the moody chart. we both know that flow is turbulent. The porting is fairly smooth - i realize it looks very rough in the pics, but i assure u its very smooth to touch. there is no kinks - or bulges sticking out - which in your case will make a restriction - and loss .
bump to the pic above ^^
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Moody shows the effect of roughness for laminar and turbulent flows (left hand side laminar, right hand side turbulent flows). It was just showing there is more effect due to roughness than people consider and if the pipe is still rough after porting you are not maximising the process.
Also, I was just pointing out very broad topics with quick answers. There are many, many, many things to consider.