Nozzle placement and quantity on tunnel ram.

[H.G. Wells]

Looking at a new combo without the blower. Want to mount my bird catcher on a tunnel ram on my 496. Should I move the nozzles to the ports, or run one set in the hat and one set in the ports? Would you have better atomization with 16 and better tuning by cylinder?  This will probably be alky only, but may end up running some nitro at some point if that makes a difference.  Wishing I had hung on to the stack set up that came on it, but not sure if there is an advantage one way or the other.

I appreciate the help.

[Paul New]

Injected alky I would run just the 8 nozzles in the port as close to the head as you can get to the combustion chamber.

Yes should have said intake valve and down nozzles😳

[afuelcoupe]

combustion chamber?? what are you talking about Paul? type-o?

[Spud Miller]

 ...as close as you can get to the intake valve. Keep the runner dry as far down as you can.

 Spud

[H.G. Wells]

Thanks all.
Spud, when I get a little closer I will re-do my tech sheet and get you to choose new nozzles and tune for me.

I believe Paul was referring to down nozzles. Not an option on these heads.

[Paul New]

combustion chamber?? what are you talking about Paul? type-o?

Yes thanks Gary sometimes I need to read before submitting......

[23T Hemmee]

My one hat/tunnel ram combo was an M-1 manifold with Hilborn Shotgun on a 512 Mopar wedge.  I drilled the nozzle holes about an inch above the head mating surface as far down the runner as I could safely get without the hard lines interfering with the valve cover.  I had little if any variation with plug readings, which, I felt were a result of having a clean shot of air for the majority of the tunnel port.  The manifold did have a plenum which seemed to also help equalize the air from cylinder to cylinder.  I was running mid 130's in 1/8th so I don't think I was getting too much ram effect toward the rear cylinders, higher speeds would probably change that if you're running 1/4 speeds.  Might need to run Enderle style nozzles with the drop in jets for fine tuning if you're looking for that last HP.  I was running Hilborn/Kinsler style nozzles, and in a bracket car, I always tried to keep in the middle of the tune-up window so I never felt the need for the drop in style, would probably go that route though, if I was building that system today.  BTW, no reason at all to run hat nozzles in this kind of setup.

[wideopen231]

My setup. Sheetmetal intake with nozzles in flange,close but not problem with VC's.  Injector depends on mood. Have enderle hat,a homemade two blade mount to top of intake(simular to two of Rons,but one piece) and a new low profile 3  rectangle port thats lower profile,longer for intake and super lite that I am working on. Hey I like to play and trry new things.

IMO intake plays major role on power part,most injectors will flow more air than a NA motor can use so intake is restriction or controls velocity of air. {utting nozzle closest to valve lets more air be in the runner to the point of nozzle.

My heads had down nozzles and I have wondered what effect having nozzle right at valve would have. Sure there is reason I don't see ,but seems regular nozzle at valve would work fin with NA motor.