Thread: big block head flow?

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Why does it appear Pat's posts have been deleted/removed/edited?

Question on thses 781 heads some of you have been talking of. With regards to gasket match porting for a street strip engine....where exactly is material being removed? From my limited instruction and understanding, gasket matching goes into the port only about 1-1.5" in depth wise....matieral is removed from the sides, the roof and floor of the ports except on the exhaust sides. I've always been interested in port work, and read many articles,,,but have never actually watched someone port a set of heads. So how much of what I know is true? Any port people out there know the answers to this?

Originally Posted by 30-A Rider

Why does it appear Pat's posts have been deleted/removed/edited?

Question on thses 781 heads some of you have been talking of. With regards to gasket match porting for a street strip engine....where exactly is material being removed? From my limited instruction and understanding, gasket matching goes into the port only about 1-1.5" in depth wise....matieral is removed from the sides, the roof and floor of the ports except on the exhaust sides. I've always been interested in port work, and read many articles,,,but have never actually watched someone port a set of heads. So how much of what I know is true? Any port people out there know the answers to this?

well it all been said. so i pull it . port matching is a waste of time for the street you want the intake ports smaller then the intake ports of the heads by .030 all the way around if you do not know where the intake will sit then you can make good stuff in to junk i have did a lot of port work but it all at the chamber front of the valve and in the back of the valve bowl work were you see power. and in the valve job i do all this so if you can not do the valve job then you should not cut and move things if you do not know how it works have seen many screwed up heads and intakes that were junk by some one thinking they were making them better and if you hit the seats with a die grinder . you will ruin a good set of heads