TIMMYBOY,
hOW DID YOU GET ALL THE INFO FOR YOUR RESPONSE OUT OF THE ORIGINAL QUESTION? i DIDN'T. (caps by accident)
What is actually done when check and unshroud the valve? I have a set of dart 355 cnc's and was wanting to check to see if they need it. Is this worth any real horsepower?
Maybe you know the situation better than we do, because we don't know zilch except what was written as a question. That question was amply answered along with methods to do it if needed.
Understand that on all of these forums there are many people who see questions and the reponses to them besides the original poster of the question. Many of them do not own porting tools and a few who do are not sure how to do the work. My explantions should be clear and to the point and easy for anyone with some mechanical abilities who are not used to working with cylinder heads. If each valve is done exactly the same the chamber cc of all chambers will remain the same. It takes quite a bit of sanding to make a one cc difference. Also this modification can in no way harm runner flow as measured on a bench. It might help some but can not hurt any. There is no such thing as a valve unshrouded too much in any engine.
I will agree with you 1000% that Joe Mondello is very sharp. Joe Mondello is not on this forum answering questions though and if the original poster had acess to him, that question should not have been asked here at all. Last I heard Mr. Mondello is very ill and is living in Tennessee. He is a member on SpeedTalk with us, but has not posted in a very long time. As a kid I greww up with Mondello Heads. I know very well who he is and his contributions and innovations.
Ed