From what I have seen only ZEX sells a kit thats advertised specifically for this type of setup. What the difference between a plate system for a carb vs. EFI? Is it because EFI runs at higher fuel pressures? I emailed ZEX but no response yet.

 

Yes the fuel pressure is the only difference....we have EFI jetting for the NX plates also

 

Ok, so any plate is fine as long as I use EFI jets instead of the jets intended for carb?

 

If you run a standalone at low pressure you can use the carb jetting.

 

Yes, you can run any plate as long as you use EFI fuel jetting... or you can go stand alone and use carb jetting. If you decide to run the ZEX kit, let me know and I can give you some good starting points for jets - that's what I run and have the jet sizes for EFI fuel...

 

Ahh, I guess it would be wiser if use a standalone fuel system for my nitrous, which I prolly should, to use low pressure and jet it the same as I would a carb system.

Thanks guys, it all make sense now.

 

Run the standalone if you dont have enough pump to support it all threw high pressure.

Good Luck.

Tony.

 

No not any plate is fine. Due to the intake design you need to flow the plate on the intake. Make sure all four corners are going to recieve fuel. I know the nX gemini plate is fine. I know someone using the ZEX plate as well. We sell 10 NX gemini twin plates to 1 Zex plate.

Make sure that you get the new NX gemini twin design. There old design cost Tony Shepard two motors.....
Dave

 

Interesting - wouldn't have thought there would be any difference since the Vic Jr was designed for a carb on the LS1. Would have thought any plate designed for a carb would work on that intake... Not trying to argue or anything - and sucks someone had to find out the hard way. That is one thing I liked about the perimeter plate - distribution is very even into the plenum with how they have the holes spaced.

 

 

The NX plate was also a peremiter style plate. Actually it was the first style to hit the market. The problem was where the discharges were. The new ones work great..

Dave

 

Hey Dave, how's the NX gemini plate compare to a speedtech plate. I had heard the speedtech plate gets the best distribution and puts down the most power and was thinkin about that on the new setup, but i'm always open to opinions from people I trust and know more about the subject!

 

I am not real up to par on the speed tech plate. No matter what brand or style just make sure you flow it on the intake.
Dave

 

Flow it on the intake? Sorry if it sounds like a stupid question, but i'm assuming it's to make sure it's sprayin evenly, but if it's not flowing evenly into each cylinder, how would I change it, or do I just have a machine shop do that, or a nitrous shop?

This is right off speedtechs website, it's kind of like a perimeter style plate, but it's got 4 big holes in the plate that it sprays out of them, looks like a neat setup:

Diffuser Plate Nitrous Systems

For years, plate systems have been just that; a plate bolted under the carburetor equipped with two crude brass spray bars injecting nitrous and fuel into the intake charge. Speedtech Nitrous has not only raised the bar in plate style applications, but we have eliminated it. With our revolutionary “Diffuser” system, we use a 2-piece stainless insert that provides the optimum spray efficiency of nitrous and fuel via a 360° radial spray pattern. This type system provides perfect distribution of nitrous oxide and fuel, delivering the most horsepower possible.

Through an ingenious new design, nitrous is injected into and throughthe “Diffuser” plate creating ahighly atomized air fuel ratio in the plenum of the manifold. This even distribution avoids the irregular fuel burn problems and leakage found with spray bar systems, resulting in lost power. The new “Diffuser” nitrous system is tunable for a 100 to 500 horsepower boost per system and is compatible with any square flange, four-barrel carburetor application.

Speedtech’s solenoid mounting brackets keep the solenoid close to the plate system for minimum pressure drop. These brackets also provide a light-weight, clean and secure method of mounting your nitrous and fuel solenoids and can be used with all of Speedtech’s “Diffuser” plate systems as well as' most other brands. We manufacture brackets that mount the solenoids either side to side or front and rear (for people who may have existing fogger systems mounted) to keep the engine compartment free of clutter.

 

The Gemini Twin is what I'm looking at, if I go 1 stage. What about the Gemini Duad Dual Stage? Any other 2 stage plates you would recommend.

Honestly I'm not too fond of ZEX, I just mentioned them because they where the only company to have the Single-Plane MPFI Plate system. But now I realize I don't have to use that specific system.

 

Ok That is similiar to the Old NX HVH plate.


I am going to try to type what I am meaning to say. I am having a hard time putting it in words so if you still do not follow me after reading this give me a buzz so I can explain it better.

When flowing the plate you are bolting it to the intake. You will fire nitrous only. You are looking at the discharge comming from the plate. The discharge should be in the direct area of the runner or runners it is feeding. You want to make sure that no runner is on the far side of the discharge and not recieving any flow.

If you have a runner that is not in the area of the flow that plate will not work and you will have to get a different one.

Dave

 

I like the zex plate.. Well other than the fact its purple.

The Gimini quad should flow well on the Victor intake. This is the only dual stage plate I would suggest.
Dave

 

Gotcha, that kind of sucks though, cuz you don't know till you already have it! How is that NX Gemini plate with the GMPP intakes and how big of a shot can it handle on a single stage plate (i'm gonna use a progressive this time around instead of 2 stage), can it go 400?

 

Exactly..

It should flow fine on the Gmmg intake as well.

NX offers the gemini in two ways.
Regular and propower.
The regular is 50-100-150-200-250-300
Propower- 100-200-300-400-500

Dave

 

I'm using a Dry shot controlled by FAST on a ZEX plate.We are not using the fuel side,we put a cap on it and are jetting according to inj pulse width...