confusion on nozzle install

[baxsom]

hello,

Looking through some past forums on nozzle placement has led me to some confusion that I hope someone can clear up. I have got a zex wet kit for my 96 GS. It has a hahn stage 2 kit installed so I am only going to use the 55 shot but I am not sure where to tap my intake piping for the nozzle. I read in previous posts that 6" from the TB is optimal.
The instructions say 6-18" and Joey from the Zex tech service said that since it is now a turbo car to put it no closer than 18". Then in one post someone installed the nozzle 2" from the TB with no problems saying that with new kits it really doesnt matter.

according to the engine builder my 420a has been upgraded internally to handle everything that my 16g can put out but to be on the safe side i left my high boost at 14
should I lower it with the 55 shot?

thanks

 

[shaneyeend]

Not answering question, just posting to put it back on the top of the forum, i'd like to see this answer as well.

 

[peanotation]

i could be wrong since i'm not very familiar with turbo affects, but i'm pretty sure you're boost will rise along with the shot. as far as nozzle placement, 6-8" is the real optimal placement. no closer than 18" is BS.

 

[Bd1000Eclipse]

You dont want it to close because you want everything to mix well before it enters the cylinder. But since you are turbo it's gonna be forced in and mixed fine. I say put it 6-8inches away. I'm hoping you have a built motor....

 

[NosLaser]

With a wet kit, I like to place the nozzle much closer than that. Typically 2-4" from the throttle body in most cases. Wet kits don't have very good atomization anyway, so basically what you are shooting for it number one as little chance for puddling and a nitrous backfire as possible, and number two, to be able to carry the heavier cloud of fuel into the manifold as efficiently as possible.

Regards,

 

[Bd1000Eclipse]

With a wet kit, I like to place the nozzle much closer than that. Typically 2-4" from the throttle body in most cases. Wet kits don't have very good atomization anyway, so basically what you are shooting for it number one as little chance for puddling and a nitrous backfire as possible, and number two, to be able to carry the heavier cloud of fuel into the manifold as efficiently as possible.

Regards,

I wouldnt be to worried about puddling with a turbo....

 

[NosLaser]

I wouldnt be to worried about puddling with a turbo....

You'd still be worried about puddling if you missed a shift and some of that fuel hit the throttle blade because the nozzle placement was too far back for it to escape before the throttle closed though.

Regards,

 

[DSMJim]

You'd still be worried about puddling if you missed a shift and some of that fuel hit the throttle blade because the nozzle placement was too far back for it to escape before the throttle closed though.

Regards,

This is the only time when Aslan and I sorta disagree. On newer style nitrous kits like NX you will not have fuel puddeling ever. Well if the nossle was placed 24" away from the throttle body it could happen but thats not using the kit properly and thats not what were talking about here really. I have sprayed 200hp on my dads Maxima single nossle, and 100hp single nossle on turbo cars and never had puddeling back fire or anything like this. On both cars I have hit the revlimiter, missed shifts. On my VR6 with a 150hp direct port I did a friggin burn out off the revlimiter with the nitrous on and still didn't have a problem. NOw thats direct port but the car sat off the revlimiter for 10-15 seconds while I smoked the tires. I noticed that the engine sounded different but it's hard to tell whats going on when you inside the car, it's loud and your wearing a helmet. I have had a backfire on an older NOS style kit however, but even their newer nossles don't do this.

Even with the throttle plate closed the fuel will get past. Just to give you an example here is our all motor car we built. Just broke the canadian record going 11.07 @ 121. I konw it's not as fast as the Major cars in the U.S. but it's the Canadian all motor record and were a little behind in the all motor scene here, yes. Regardless...

You must be logged in to view this image or video.

We have our injectors on the outside of our ITB's in an F1 style format. The car idles perfectly fine with the injectors spraying on closed throttle plates. As funny as that looks iwe didn't have to make any adjustments to our management to make the car idle better (not that it idles good anyway) but we didn't have to do anything special. Of course this is a lot less fuel than a nitrous kit puts out when your spraying at WOT, however even still in that circumstance the fuel and nitrous would slip by into the engine and run out with no problems.

What I say around here is mostly just my experience with nitrous kits on my own cars and what I have done. I really have no theory or understanding of any major amount ouside what my experience has taught me. So I don't claim to be any expert or super nitrous master or any type. Aslan keep this in mind when your tearing my post appart. :laugh:

 

[NosLaser]

No, nothing for me to tear apart. For the most part you are correct. A simple rule of thumb for a single nozzle wet kit is closer to the throttle body, you'll have less chance of puddling, farther away, the chances get greater. The difference between 4 and 6 inches will probably not change anything too drastically, and especially on a turbo car, everything will usually get past the throttle blade. If you want to get anal about it and take everything into consideration as a 'what if' then I would put the nozzle closer. That's all.

Regards,

 

[1995badgsx]

2-4 inches from throttle body

ive always put them in the throttle body elbow on the 4g63 and never had a prob...later