Ok gave my Thoughts, at the first of this thread, ready to give a few more.:lol:
So, it was surprising, for me, that when he tried a 50 degree seat, how it flowed. I figured the 50 Degree seat would allow more cfm for the same valve size.....and it did! But exactly the OPPOSITE of what i thought it would do. Gained low lift flow and lost upper lift flow. I realize that the head has been ported in the bowl area before he started and, maybe it can't be shaped to support that valve angle. Still not what i expected of the 50 degree seat.
I think the 318 head is a much better for this project. NOW HOLD ON, don't be jumping on that high horse just yet(couldn't stop you if i wanted to any ways)
Yes 318 over 360 head, and here is why(just my lack of "experience" opinion) OK so air speed is really more important then cfm, to me. You get to much, you get turbulence(I'm not taking swirl) you get to little and you get fuel drop out. So, yes you can easily easily port a 360 head and get more flow with less turbulence. you can get 240 cfm easy there are many who can get much more then that.
Now, no one has flow tested that little two barrel manifold..........just to make my point, lets say that manifold flows 120 cfm and they get it ported out to 190 cfm(just throwing numbers in the air).
OK Now, What do you think is going to happen to the air speed that will be traveling, way to fast in the intake manifold, then slows to a crawl when it hits the 240+ capable head........Its not going to magically speed up to 240!!!!! is going to slow way down, and the fuel is going to drop out and just run down the floor of the port. end up in the combustion chamber as un burnt liquid)May get burnt but way past the Power stroke.
What make the most HP, is the most air and fuel that you can jam in to a cyl that is burnable on the power stroke. Liquid fuel is NOT THAT!!!!!
And i haven't even talked about what that tiny teen carb is going to do to the air speed/flow.
I now return you to your regular scheduled program.................................................