Im sure it will be when I get it, travel to Buff. NY this time of year is a bit tricky

Ok, thought you already had it.

Want a much better exhaust port design?

You can, but you'll have to change pistons, rocker arms, pushrods, valve covers, intake, headers, and etc, etc, etc.

https://www.youtube.com/watch?v=LmVVoUT7Di0&feature=player_detailpage

^^^^ I bet my man has a magic room.

and don,t forget the guide work every 50 hrs.

Some good arguments, but I guess my .02 is I suppose if someone can show me un biased proof of a back to back conclusive engine test on the dyno with all else being equal using the same engine, other than a head swap comparison, then until then, I will stick with the port that comes from AFR factory. I like making more power thru the cylinder heads, but I figure that ol' warsh tub of mine is gonna go plenty fast enough for what I want.

If somebody does a back to back test one day using AFR's factory cnc'd exhaust port vs a modified AFR cnc'd exhaust port that is supposed to be better, then when it comes time that I must do a rebuild on my engines, then then perhaps I will consider having my AFR cnc'd exhaust ports modified.

If Smitty ("Articfriends") 540cid engine can make 1115hp on the dyno with his little 315cc AFR's, then that is good enough for me for now---he's an honest and respected test bed.

A buddy of mine built a pair of M4 Procharged 522ci engines. Each engine was dynoed at least twice, maybe even 3 times, with different cams, carbs, etc. Anyhow, I was there and witnessed the engines make big power on the dyno runs. They exceeded 1200HP each time, just at a little different rpm range due to the cam changes. However, they did so with alot of boost. 15lbs if I recall right. we told him that was too much boost for his combo, and it was, but he liked that 1200hp number.

They did that, with Edelbrock Performer RPM aluminum heads. So, technically, I can say Ive seen the edelbrock heads support 1200hp on the dyno. However, I would be willing to bet anything that bolting a set of AFR heads, Dart CNC heads, that they would have gained quite a bit of power hands down. And made as much power as the edelbrocks, but with less boost, and simply been a better setup all around.

I think their is a big misconception out there that forced induction engines don't respond as well to higher flowing heads, as much as a N/A does. Also, when power packages are looked at in that manner, one must consider not all forced induction systems are created equal. Lets say you have a roots blown setup making 1000HP with XXX heads, and you thought the heads were hitting a wall airflow, or power wise. You may then generalize, and say xxx heads are good up to 1000HP. But, you have to figure in the other things too. Like parasitic loss. The dyno is simply measuring power at the flywheel. It does not know what the parasitic losses are. So that 1000HP roots blown XXX head setup that was maxed out, may actually support 1100+HP with a whipple, or procharger, psi, turbo, etc. Then of course there is air temperature differences from blower to blower, and many other variables that can change the output at the flywheel.

Fwiw, that engine combo above I mentioned, got tossed out in favor of, bolting on a pair of AFR 315 heads, a 1071 littlefield, blower shop intercooler, and cams from Bob M. It made 985HP, with 10lbs of boost on the dyno, and 930HP with 8lbs of boost. The combo is very nice, and we are excited to install them in his 42 Fountain soon and see how it runs.

I guess my point is, if smitty turned his boost up even more, I think you'd see those heads support even more power with the 315 AFRs. Sorry for getting a little off topic, as this post really has no answer to the op's question.

Smitty is a good example, because he had other heads before (Merlin's) and couldn't make anywhere near the power he was looking for, even turning up the boost. He got the AFR's and surpassed the power he was looking for even with boost he was more comfortable with.

BObL ran into this also. Too much boost for the power (some box stock basic Brodix) and more boost wasn't doing anything. I think BobL ended up going to a set of Ported Brodix's or etc and made his number with acceptable boost #'s.

Many more example's, but these where chosen because of being members here, to agree with MildT and many others. Adding more boost is not always the answer - ie: doesn't always make more power if the combo of parts is not there to support the added airflow.

that engine with 17 lbs boost made close to 1300 hp but it was not safe on pump gas.the new roots combination made just shy of 1000 hp but imo,it will be a much better engine and should last for a long time with only oil changes and a lot of fuel.