351c 2v Head Porting?
Postmaster
Joined: Aug 2001
Posts: 4,270
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From: Delaware
The shortside radius is the tight bend where the port turns to the back of the valve. The longside radius is the outside bend and the shortside is closest to the port. The bowl is the area away from the back of the valve. Think of water flowing through the port and out the valve, you want the water to flow without and ripples of turbulance. To do this you need the gentlest curves that you can get. Of course there are limits to what you can achieve, but a little improvement over stock will go a long way.
Postmaster
Joined: Aug 2001
Posts: 4,270
Likes: 5
From: Delaware
Originally Posted by EFM
how much should i be removing from the
short side and bowl area. how do i measure?
short side and bowl area. how do i measure?
Be careful, don't overdo it. You could get into the water jacket and ruin the head. You should err on the side of caution. A mild port job is better than stock.
Posting Guru
Joined: Jul 2007
Posts: 1,355
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Originally Posted by fordeverpower
Imho, the short side on those heads are the worst of seen, nearly a 90 degree angle. They can be rounded and smoothed easily, just did a set for a dirt track car. The bowls can be opened up some as well. i wouldn't mess with any guide work if your seats are done already. A good multiangle valvejob and good valves help a lot.
Postmaster
Joined: Jul 2003
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From: iowa
Originally Posted by hollenjoe
I read somewhere that 75 heads and up have water passages right beneath making this impossble to do, any words on it ?
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