For everyone on this site that's been following the constant "battles" between many of the most popular head manufacturer's over "who's head's the best?", I've put a link below to a site that will offer a real eye-opening run-down from some of the best head porters in the nation about almost ALL aspects of the entire operation and some really deep details.
A good friend of mine, who "hangs" around there contacted me about it this weekend when this particular post showed up there, and directed me there.
I hope the link works the way I figure. If not, I'm sure you'll get there one way or another.
If you have time this is most definitely one "red-hot" topic. Believe me, this WILL fill in many or all of the blanks. Thanks Gary in N.Y.
P.S. I'm going say this while I'm here, it will pretty much explain why high-end units cannot use ANY fully CNC'd option to be in any sort of "serious" competition. I've posted many times here before, we order very few CNC'd pieces, ALL of our own "serious" high-end units are finished with the old
"tried & true" in-house "hand-porting". I could mention some names up here, that many would recognize immediately, that we've done some "major" final porting for on units that were destined for the "record-books", but I'm not going there now. I've been "hammered" a while back for "name-dropping", and it's not needed here anyway.
At first I was not going to bother to answer this but I don't feel it is fair not to so,,,
With all due respect, you are comparing apples & oranges here.
You are comparing the heads that some of the absolute best in the business do against what are good 'out of the box" affordable cylinder head that most here can buy & use.
The post your are referring to is talking about cylinder heads you are not going to touch for less than $5-$10,000 in some cases.
How exactly does this help the average person here that wants to know what is a great head for a decent price they can buy & use?
I have said this before & I will say it again.
In my opinion, for an OUT OF THE BOX head that delivers you are going to be hard pressed to beat the AFR heads.
And you will find that the AFR CNC program is one of the best finished cylinders heads in the $3000 class out there, on this almost no one will disagree with even if they feel another head is worth more power.
Are there other heads that will kill it in the correct hands?
Without a doubt, give someone like Larry Meaux, Darin Morgan or Curtis Boggs just to name a few a set of heads for your project & you will see a huge difference in power.
But these guys do heads for record holding Comp eliminator cars, SS cars, even Pro stock stuff & these are not a $2000 to $3000 set of heads.
And as for CNC heads not being capable of being a great head this is pure crap.
It all depends on what you start with & how well it is copied.
Here is another post on there you might wish to read
In particular this by Curtis
"You can almost always get a better head buy using a cnc head then
having the the RIGHT guy go back through them, .. CnC machines
are just copy machines, .. it doesn't mean what they cut is perfict.
It's up to the person who designs the port to start with, .. . as in the
case of the original post here by Larry M, .. he's designed a nasty
cylinder head, ..
now if he would put THAT in a CnC port it would kill anything else out there.
Racing Flow Development
Simultaneous 5-axis CNC Porting
Or this by Larry:
"purely out-of-box..absolutely no touching them,
the AFR 24 deg Large Oval Port heads
..might be worth looking into ? "
I guess it all comes down to what we are talking about here.