Way, way back I read about a system which used SCUBA
tanks, solenoid valves, jets ala nitrous systems to push a
cold / forced air shot into the intake. The jet pushed added
air via venturi effect.

It seems to me like a properly constructed, jetted inlet tube
could do this with the nitrous even more effectively. Maybe
there is some of this action in some systems but I guess
you'd be looking to see greater than BARO manifold pressure
and I haven't heard of anyone getting there.

But could you?

I'm thinking multiple small jets spaced about the outside of
a tube, maybe just drilled-in at an angle with a supply ring
welded outside. More jets involving more air "hydrodynamically"
than a single big'un.

I don't know if the nitrous shot is strictly a zero-sum energy
source (sink) or if the energy stored as pressure could be
"harvested" as a bonus.

Food for thought....

 

I believe Zex has done some thing like this in there plate systems, http://www.zex.com/Base/Video/ZEXPlate_WEB.wmv but i havent seen anything for ls applications.

 

I think it could only work in an IR system, but may not be practical.
The amount of N2O per cylinder would be great, and the boost effect would likely be minimal if at all.
With N2O it's so much easier to just increase the jet size than it is to struggle for a tiny bit of boost pressure.

Boosting a sealed plenum with pressurized air is also impractical because the tank required would be as large as the car.

 

I dont know if hes trying to get the manifold to see boost, as much as speeding the airflow up more.

 

that's mad tight yo

now some Honda owner is going to mount one on the back of the car to provide thrust.

 

 

I'm just thinking about the possible upside, the only thing
better than cold dense air is more of it (for less, of the
limited bottle contents).

Think like jet pumps for your well or your Sea-Doo; a little
high velocity jet impels a larger, lower velocity stream. As long
as that velocity exceeds the "natural" draw-in of the motor
I figure there could be a bonus.

 

I wonder too.
Maybe a sensitive pressure transducer in the intake port near the valve could show some results?

It still seems like it would take a very large dose of nitrous on the order of double the engine power or more to get the extra benefit.
I wonder what size a shot was used in the demonstration video.

 

It does speed the air velocity but doesnt have enough inertia to create a "boost" situation in the order of psi.. On the other had it does create a vaccum.. Since you on the subject have you ever thought about it on the exhaust side?? I have played with this idea for quite some time, mainly because the issue of having to large of exhaust creates great flow potential but poor velocity.. The boost venturi concept works well in a tail pipe to boost the velocity of the exhaust, hince aiding in clearing the cylinder to a certain degree while adding a nice "rocket" look to it as it exits the exhaust.. Now imagine what it would do in aiding in spooling a turbo, somethin to think about huh..

 

People have already been using compressed gas to help spool the turbine. I think CO2 is the normal though.

 

got any pics of that? do they mount a nozzle right before the impeller??

 

Check out the NX jets, i believe they use a sort of "Venturi Effect". some interesting ideas. we use the ole venturi effect in the maritime trade a lot.
Robert

 

A friend of mine has a nozzle mounted on the exhaust snail of his turbo. I'll try to get a pic of it by the weekend. I don't see him every day.

 

I was thinking about tapping a 1/16" nozzle on the cold side of the turbo pointing at an angle at the turbine.

 

I think CO2 is cheaper and can be used at much higher pressures to deliver more force. I've never used it myself, but that's what I hear.

 

One thing i would fear is cold liquid c02 hitting the hot side of the turbo and causing thermal expansion