Howdy Folks...
I love my NX system, but I am also having some major headaches from it.

Here is what's going on...
I currently run NX Gemini Twin (Dual Nozzle), and I have had great success with the 100 shot. I actually took 1.3 seconds off my ET in the 1/4 with it.

Now The Problem...
I decided to bump it up to 150 shot,
and then the problem started to happen.
What happens is a surging when it's a full speed.
I can watch my rpms rising in a sluggish matter.
My mph is higher in the 1/4 by 3 or 4 miles,
but my ETs are actually slower by .2tenth.
I don't know if it's because I am running rich,
or if something is wrong with the bottle??
Another friend of mine,
has the exact same problem when he runs a big shot.

I called NX with the situation, but they just say that's not right,
it shouldn't be happening.
They asked me to check bottle pressure to make sure it was in the green, and it is, so I still am stumped.
The other thing is it doesn't do it when I run the 100shot,
so I know the system does work.
Also to let you know, I dyno my car with the 150shot,
and it was running rich, but I thought that would be better then lean.
NX did say change my fuel jets from 22 to 20, but that does scare me since it will be leaner.

Is anyone else having similar problems, and if so how did you correct it?

Any suggestions would be greatly appreciated.

Thanks!!
AlFromSD :flag

 

ATAP would be the best bet to see if you are running piggy rich. If you are running piggy you should check your plugs, did you go to the TR6? Do you hear LOUD pops or bangs coming from the exhaust when lifting after a 150 run??

With you MPH getting higher and your ET dropping a 2/10 sounds like a my tranny when it was slipping away. Of course I don't see yor 60'. If you are spinning more your mph will be a lil higher...

ATAP a run.

 

[Modified by alfromsd, 10:37 PM 6/30/2002]

 

ATAP would be the best bet to see if you are running piggy rich. If you are running piggy you should check your plugs, did you go to the TR6?
I went with Denzo Iridium Plugs.

Do you hear LOUD pops or bangs coming from the exhaust when lifting after a 150 run??
Just your usual rumbles after using nitrous.

With you MPH getting higher and your ET dropping a 2/10 sounds like a my tranny when it was slipping away. Of course I don't see yor 60'. If you are spinning more your mph will be a lil higher...
Not spinning at the line since I have a progressive controller, and the nitrous doesn't even come on till 1 second.

ATAP a run.
Which system do you recomend?

Thanks
AlFromSD :flag

 

Just a thought - how old is your clutch? It could be slipping..

 

It's an A4, good try though :)

AlFromSD :flag

 

ditto that :) .. kinda like my a4 slipe slidding away :D :D

for the ATAP here is the site. They ahve a KCIKARSE version coming out in the next week or two!!!
http://www.autotap.com/ :cheers:

 

damn :D :D

hmmm where you using the controller on the 100 shots???

also how many miles on your tranny????


[Modified by intel55, 12:47 AM 7/1/2002]

 

hmmm where you using the controller on the 100 shots???
Yeah, I am on street tires, and they would slip otherwise.
I have pulled a 11.843 in the 1/4, on the street tires,
along with the controller.
On the motor alone,
I average around 12.8-13.3 depending on track & weather.

also how many miles on your tranny????
Around 50K but I don't think it's the tranny because the same thing happens to my friends, and his is a new Z06.

I also wonder...
The Gemini Twin is a new system from NX.
Maybe they haven't figured out all the bugs yet.
I do know of someone (Bruce1) using this same system without any problems, and a very big shot.
He did tell me at one time he had the same problem,
but he tryed a different bottle, and it went away.

And just to let you know,
on the 150shot I am running at least 10:1 for fuel/air ratio.
I now this from the dyno I did.
The reason why I say at least, is because that's the lowest reading the dyno gives, so it might be even lower.

AlFromSD :flag


[Modified by alfromsd, 11:06 PM 6/30/2002]

 

Take care of your warped rotors! :lol: :lol: :spam

 

well you are piggy rich. I wonder if the bottle Bruce swichted to had a higher flow valve and this is aprt of your problem. I am not sure as I run a TNT kit and the problems I had was a tranny exploding on me :D .
Trying leaning yourself out and checking with others if a bottle valve could be a restriction for a 150 shot. :cheers:

also make sure again tha tyou have the correct jetting.


[Modified by intel55, 2:34 AM 7/1/2002]

 

well you are piggy rich. I wonder if the bottle Bruce swichted to had higher flow valve and this is aprt of your problem.
Same valve, just new bottle.


Trying leaning yourself out and checking with others if a bottle valve could be a restriction for a 150 shot.
Bottle is suppose to go up to 500+shot, but maybe the valve is messed up?

also make sure again tha tyou have the correct jetting.
Jetting is correct, just checked it when I when back to the 100shot,
and ofcourse no surging on the 100shot.




[Modified by alfromsd, 2:47 AM 7/1/2002]

 

so if i understand this, the ONLY change from 100 shot to 150 shot is jetting? Still single stage? you're getting a surging/pulsing in engine RPM on the spray? I do not see how running rich, even PIG rich, would cause this surging. In my experience, running super rich kills the shiit out of power, turns the motor into a pud. also, I would assume that if you're rich on the dyno while spraying, that your rich at any shot. So, you should have symptoms at 100 shot also if it were related to A/F. If you are truly surging (power fluctuations) while spraying, i would look to your controller that is pulsing the noids. If i were you, i would get rid of the progressive controller, throw it away (or put it up for sale on Ebay); you dont want it. go with a true dual stage setup if you plan to continue to race.

 

Yes I only change the Jets when changing from 100 to 150.
Being a twin nozzel system, I have to change 4 jets total,
but only a single stage.

Very good points, but I do enjoy the controller since I run street tires.
Makes is much easier to hook, and a little safer on the engine since it doesn't smack the motor right away with a big shot, rather it starts low, and works it way up.

I also know of someone else (Bruce1), using the same system,
and exact same programer, on an even bigger shot (200) without any problems.

There would be no way I could hook even with a 100shot, with my tires,
on any track around here. If i got slicks sure, but I like to be able to do it on street tires, plus I do enjoy the occasional street race.

So you don't think running rich, even piggy rich would cause this problem?
Maybe NX does not have the right settings for the jets since it is a new twin nozzel system?
Here was something I found really interesting about the settings.
When using a 100shot, your fuel jet is 18(Each Side).
On a 150shot, your fuel jet is 22(Each Side).
Now on the 200 the fuel jet jumps all the way to 33(Each Side).

Just doesn't make sense to me I guess.

Thanks!
AlFromSD :flag


[Modified by alfromsd, 3:42 AM 7/1/2002]

 

ttt

 

hmm odd. If the
ONLY change is the jets between the two setups, everything else ceteras paribus and the a/f going under 10:1, then I think you are going to rich and fouling the plugs. They can have a hard time firing that rich of an a/f just like when it is 16+ the other way.
I am not familiar with your plug type. :cheers:
maybe try NGK TR6 gapped to .038-.040 and see.
hmmmmmmmmmmm

 

opps forgot to add ATAP and run or three :D :D

 

Just borrowed a ATAP from a friend,
so I will go fill up my bottle right now, and try it out on a 100 & 150shot.
I will give you the readings tonight.

Thanks again,
AlFromSD :flag

 

send 'em my way if you want :D
make sure you all the correct parameters :D
b1s1 and b1s2
timing
misfire (current)
KR
TPA
RPM

are the general ones to use when running the gassssss.

 

Correction, Intel:
B1S1
B2S1 (not B1S2)
KR
Misfire
Mph
TPS
Cell
Inj pw B1
inj pw B2
LTFT B1
LTFT B2

the reason i say get your LTFTs is because they do affect WOT as the computer takes a snapshot just before going to cell 22 (WOT) and makes a final adjustment. If your LTFT's are super lean (positive %'ages), then WOT will get a predetermined 'go rich' command at start of WOT. Just a little additional info, not to dwell on a whole bunch. do you have a MAFT or Edit to tweak with? Let us know what #'s you get on your traces. get both N/A wot's and N2O wot runs.