Hey guy's,

I was thinking of machining a spacer to go between the upper and lower intake manifold that could be plumbed with a specifically tailored spray bar for nitrous oxide. My idea here is to make a less complicated direct port system and something alittle safer then a standard single nozzle wet kit. My thought is to try and make it similar to a plate design usually used on carburated engines. I understand that it will not allow you to have the same precise cylinder tunning ability as a 6 nozzle direct port system would, but I figure it can work just as good if not better then a single nozzle wet kit. I feel it would be safer also because you can get the nitrous/fuel mixture alot closer to the combustion chamber.

Here is a low down of how I want to produce it and my question is do you guys think it is a resonable idea to follow through on?

Fabricate a 3/4 to 1" thick aluminum spacer using the gasket that is between the upper & lower intake manifold. Produce a slinder hole through the center of the spacer that is centered in the intake track to accomidate a combination nitrous/fuel spray bar. Tap end of spacer to accomidate for the thread in style spray bar (each spray bar will be a specific amount of HP output).
Spray bar will also have required threads to accept nitrous and fuel feed lines .

Each spray bar will be individually designed as a specific HP output. The same way jet's in standard nitrous kit's are applied for specific HP outputs.
the decision to produce each spray bar rated as a specific HP rating is for good reason. The openings in the spray bar that allow the mixture to enter the intake track will gradually have to increase in size as the get further away from the feed lines. This will help maintain a more even distribution throughout each cylinder unlike standard single nozzle systems. My only concern with this design is making sure that the HP rating's are acurate throughout each cylinder. I'm sure that if a manufacturer thought this would make a good application specific bolt on kit I could probably get some help with all the fluid dynamic's required to generate the spray bars.

So what do you think? If there was something like this out there would you consider purchasing it? Do you feel that it would be to costly to purchase each spray bar. If you do then keep in mind that a direct port system would cost you about the same price for 6 nitrous and 6 fuel jets every time you want to adjust your HP output.

At the very least do you think that a pre-tapped spacer would be a better way to go with a classic direct port system. I think there are alot of people out there that wish their direct port system's were removable without having to worry about the holes they made in the stock intake manifold.

 

Wow, thats a load of info/ideas, obviously you have been thinking about this for a while.

I think its a good idea not to have to thread into the manifold and folks are always looking for a better design.

The only problems I see (which you have already addressed) are the cost and time to change when and if required. Once you decide on what HP you actually want (most people have difficulty with that one) then it would probably be close to the same price as a D/P system.

I wonder if any of the manufacturers have thought about this and tried the idea?

Great idea and very interesting reading. Do you have the capability or access to machining so you can experiment/test the bar?

I think NOS created a nozzle that fits into the injector port to replace the classic D/P system, not sure how that has worked out. I think some of the engine designs don't have to clearance to allow the installation.

Be sure and keep us informed as you progress with your idea, you obviously have creativity and a passion for improving which is always welcomed by all enthusiasts.

Good Luck
Jim

 

Make sure you have enough hood clearance... I dont know if my hood would close if the manifold would've been an inch higher...

 

http://www.holley.com/HiOctn/ProdLin...SNS/Ford1.html
sort of like this ?

 

Hey guy's,

Thanks for the input. If I do proceed with construction it will be similar to the holley kit. But I want to try make it out of aluminum. I even want the texture on the outside of the plate to be similar to the stock intake so it kinda just blends in. Somebody up top asked if I have access to a machine shop. Yes, I have my own personal machine shop. Nothing to special, but more then adaquite to get the job done well. I also know a few local race teams that can help me out with making sure the spray bars will atomize correctly & can meter the HP rating of each bar. It's really just alot of R&D when it comes to tunning the spray bars. Well shoot guys I think I should try to take on this project and see how it all turns out. Thanks again for your input and advise. I appriciate it.

 

I was wondering about the hood clearence also, but I think I can't slope the spacer so that it will remain the same height back at the plenum. I think the spacer will work best as a kind of wedge shape. I thought this would be the best way to go so I won't have to extend any hoses or electrical that that might end up being to short if the upper intake manifold is raised another inch. I do have a kind of primitive machine shop here in my garage. It's more then adaquite to produce a high quality finished product. I wish I had a CAD controlled CNC lathe, but who's got a spare couple hundred grand laying around? As far as the fluid dynamic's are concerned I have a few friends in the area that design there own nozzles and such. They should be able to help me make sure the atomization is proper. I really think it will be a nice design. I like the fact that the entire system design will be 100% removable. without having to worry about plugging any holes. I think what I'll end up doing is making 2 spacers at the same time so there identical. This way I can tap on strictly for individual nozzles & the other for the spray bar idea. I'm hoping that if everything works out smoothly I can eventually produce them for other maxima owners. More then likely the pre-tapped direct port nozzle spacers will be on hand, but the spray bar design will need to be special order due to having to manufacture the spray bars as ordered (HP request).

Sorry about the double post, I thought the first one didn't make it through. Website said not responding?

 

First stages of prefabrication are complete?
I went ahead and purchased a brand new gasket that fits between the upper & lower intake manifold. I also took measurements to ensure the proper hood clearence.

1st step
I traced the gasket outline on to a 3" thick pieces of styrofoam and cut out the shape using my dremel.

2nd step
I then turned the styrofoam on the edge and ruled out a wedge shape based on my measurements, then cut it out with my band saw. The styrofoam is now 3/4" at it's thickest point & tappers down to 1/2" at it's thinest point. The reason I decided to tapper the spacer is to ensure that the plenum on the upper intake manifold will sit very close to it's original position from the factory. This way I have no worries about any electrical or mechanical items being short or stressed.

3rd step
I proceeded to cut out the center section of the spacer where the actual intake charge will enter the lower portion of the manifold. This was tricky, since the spacer is a wedge shape & the intake tracks need to flow correctly to match the upper & lower manifold. I have purposely left these holes smaller to make the correct adjustments once I have removed my upper intake manifold.

At this point I have stopped all prefabrication to get some more info regarding the position & diameter that the spray bar's need to be. I appologise for not having any pictures to show you, but I really want to wait on posting until I have the spacer cut out of the aluminum. This way it's easier to see how I prefabbed the setup & the end result. I have documented each step I have taken with photo's so don't worry the time will come when all can share in my joy?

 

Wow... this is like one of the first intelligent things about nitrous i've read on this forum in all of the 16 or so pages... =)

You spoke on atomization and everything. =)
should be cool to see if/when ya get it done. Keep us informed

 

I also saw a thread that interested me in the atomization issue. I saw that some peopel have used throttle body spacers that are spiraled on carbeurated vehicles for better atomization. Would these work well on wet kits? sorry for the hijack

 

You mean like a rifled carb spacer?? I belive the main use for a carb spacer, depending on the carb, to increase the volume of the plenum, or add torque via carb signal....

Wouldn't really help on a TB car