Technical > Spud Miller's Cave

Nozzle placement and quantity on tunnel ram.

<< < (2/2)

Paul New:

--- Quote from: afuelcoupe on April 30, 2015, 11:18:52 PM ---combustion chamber????? what are you talking about Paul? type-o?

--- End quote ---

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.

Navigation

[0] Message Index

[*] Previous page