I'm not a board expert, professional head porter, and I'm not selling anything just an average knucklehead with a flow bench and thought some might find it interesting. Anyway, I tested a stock stage v hemi inline dual 4 intake on my little sf110 flow bench last night and it looked like this.

Lift/ change cfm
.1 n/c
.2 n/c
.3 -3.2
.4 -5.9
.45 -7.8
.5 -8.2
.55 -11.3
.6 -10.9
.65 -11.3
.7 -11.4
.75 -11.4

Some info, Stage V s/r head, 2.25 valve with basic bowl blend and runner entry gasket matched. 4.25 bore, opposing runners taped off. Head peak flow at this point was ~380 cfm. Alignment wasn't dead on (pic attached) after I snugged the intake it drew past and the floor is showing maybe a 1/16. Doesn't look like this on the engine and I'm guessing from previous experience it doesn't effect things as much as one would think. Was just too lazy to take the head off after having it all mounted up and open it a little more.

Bench is way small for this kind of r&d but interesting to me none the less. This is the intake arruza sells that has about .250 milled off the carb pads for hood clearance but is otherwise stock. Very nice looking piece, some improvements to be had? I might play with it slightly but prefer the intake a touch small for what I'm doing and like I say this bench is small for heavy intake work IMO but what do I know?

No loss or a gain would be great but the few mild combos I have tested have always lost a good bit with the intake. I'd have to look for exact #'s but know a stock 6bbl and a performer RPM killed much more than this on a 270cfm sbm head.

Anyway, thought I'd share with the moparts folk. Comment or suggestions welcome.

Oh, yes I know this head flows much more CNC ported but I wanted to play with it myself and creep up on it, just how I am That's the main reason for no actual flow #'s one bench to another don't mean much anyway! As cast the ports are big and its already at min cross section for what I want but I have a few more things to try.

Alignment

It is a very popular intake. I sell a lot of my AR075 throttle linkage kits for that intake. The other Hemi throttle brackets don't sell nearly as well.

I put magnafuel shear plates on my StageV intake, raised the carbs up a 1/2" so I hope my carbs clear the hood. I had to do some serious porting to get them to fit. I hope they are worth it. Tim

Open up the runner between the front and back. We have and it helps. We did some that we even had to go back and reweld from underneath. That intake has made almost a grand on the dyno. Not to shabby for cast piece.
Todd

The linkage I make is also a 1:1 linkage. The 1:1 setup seems to work better with the single plane intakes. I think I'd want vacuum secondaries on a street car though, or else use a pair of Edelbrock carbs.

Yeah I plan to hack on it a little maybe and see how bad I can screw it up 1k hp with this things is doing some work! I'll be lucky to make 700.

Andy, I plan to get your linkage setup. I'm the guy that asked you about making a HEMI head flow bench fixture, sure wish you did!