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.