VIOLENT\6
12 second N/A Slant 6?
That's the way I would do it.
318 head porting for the average joe
- Thread starter 1wild&crazyguy
- Start date
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That's the way I would do it.
moper
Well-Known Member
In terms of surface finish - on intakes I use the carbide and then hit it with the coarse grit roll. I don't polish them. On exhausts I'll go with the smoother rolls and flappers.
sublimeswinger
SUBLIME Senior Member
Think i messed them up
mini
Small Bore Long Stroke
My #302s I ported. 1.88 1.62. 3 angle. 54cc Chambers. 14@96mph stock 318 block. Good heads
http://i244.photobucket.com/albums/gg6/LA360Dakota/cimg0379.jpg
http://i244.photobucket.com/albums/gg6/LA360Dakota/cimg0379.jpg
Personally, i don't thing you need to get that crazy in the bowl area.(Depending on what your building for) But now that you have, you need to build temples so that you can have the same port(Bowl) shape when you do all the rest of them.
Sharp edges, scrape fuel out of the air stream. So you need to smooth them.
I would ruff up a few more ports and then go back and smooth up your first.
Now build temples for that port, make the rest the same.
Now you have a head, to test on you eng.
Exh., i wouldn't port at all, clean up, leave the floor untouched.
EDIT: Sorry guys, didn't realize this post was so old.
mini
Small Bore Long Stroke
CordobaDart
318 SLANTMAN
Working on my first set of heads. 587 J heads for my 73 360. Couple pics so far.
Last edited by a moderator:
Nice start.. (Miss Justin...).
Don't make sense, a sticky by a banned member...
Welcome to the new FABO twice the members and half the entertainment/education ,kindly like cable TV ,so many channels and nothing to watch.
CordobaDart
318 SLANTMAN
Getting more done as I have time once I have them all cut to look the same, I will get back equipment to cc them.
CUDAGUY
aka Prince Valiant
Similar results here. A tractionless 14.6@97 in my 66 'S' car but with the stock valves
Stupid question (s), but im looking for clarification on terminology.
I read the term "ssr" in here a couple times. What's it mean?
Also "push rod pinch"?
I did my own 273 heads and am now planning on cleaning up my freshened up X heads
Thanks In advance.
Great thread
I read the term "ssr" in here a couple times. What's it mean?
Also "push rod pinch"?
I did my own 273 heads and am now planning on cleaning up my freshened up X heads
Thanks In advance.
Great thread
Ssr is short side radius. Use search to find out more. Push rod pinch is the cast area that restricts the flow where the pushrod hole is drilled. I would post some pics but I am on my phone.
Seriously (Short side radius ) meaning the shape of the bottom of the port pathway. That's number one ,to win the game. And a books and chapters to read ,to get it right. Or grab a bad cylinder head ,and not carve ,and ask questions.
"Pushrod pinch"? That's the restriction you see on an LA head ,around the pushrod. Unless you need 280 c.f.m. on a,intake port. Don't worry about it.
Look at post #160. See how the ports narrow immediately after the opening in the far side of each port? That's the pushrod pinch. The pushrods go through the head just the other side of each of those pinched areas. Make sense?
Agreed!
It's not the restriction that you may think. The ssr is vary capable of doing its job with a little cleanup. When you start to change the shape of the ssr, you disrupt EVERYTHING in the port and the combustion chamber.
Thanks guys. As mentioned I did my factory 273 heads a couple years ago.
With my new engine build Im hoping to make some "homemade" HP and "improve" on factory design.
When I did it the 1st time I used carbide burrs. No drum rolls. I honestly never thought to use those.
I do have a ton of them I bought at an auction. I'll post pics.
Carbide burrs are $$$. Up here a decent one is like $40 easy.
Thanks again.
With my new engine build Im hoping to make some "homemade" HP and "improve" on factory design.
When I did it the 1st time I used carbide burrs. No drum rolls. I honestly never thought to use those.
I do have a ton of them I bought at an auction. I'll post pics.
Carbide burrs are $$$. Up here a decent one is like $40 easy.
Thanks again.
Well spoken....If you have ported a set of heads with a burr, then you have a good handle of a dye grinder. 80 grit sandpaper rolls.
Remember, it's not "Port and Polish" Its round smooth with a ugly texture,not polish!
The set sure need some rounding/smoothing..............
Never done a 302 so i can't say. But that sure look like a lot of material to remove there. and why is it there. has to have some purpose! would have been way easier to have made the mold smooth there then add that bump, must has a reason, but i have no idea.
K, here is a couple question for you.
What is IN the combustion chamber? And, what is the Material that is in the exh port sealing off the air ports.(small holes that are drilled in the exh gasket surface that go into the port.
Never done a 302 so i can't say. But that sure look like a lot of material to remove there. and why is it there. has to have some purpose! would have been way easier to have made the mold smooth there then add that bump, must has a reason, but i have no idea.
K, here is a couple question for you.
What is IN the combustion chamber? And, what is the Material that is in the exh port sealing off the air ports.(small holes that are drilled in the exh gasket surface that go into the port.
Hope.to start x heads shortly. I have a set of 302 as well. Not sure what that hump is in the roof. But it looks like it serves a purpose
LowDeck451
Well-Known Member
Dk1985.....
I have a set of 302's, that hump in the roof is in line with the freeze plugs on each end of the head. You could remove the plugs and look in there to get an idea of how thick it is, meaning - you would be looking into the water jacket at the top side of the ex. port roof.
I have a set of 302's, that hump in the roof is in line with the freeze plugs on each end of the head. You could remove the plugs and look in there to get an idea of how thick it is, meaning - you would be looking into the water jacket at the top side of the ex. port roof.
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