I put the NOS wet kit in my car and the car is a beast I have a good in and out combination (look sig.) the car respond very hard!!!
I have 100 shot for know (52/28) question... what yet combination you guys w systems are using?
I know some Zex guys post some combination but they are not the same for the NOS or NX systems... I have two friends down here that have zex in there G35 and one of them went to the dyno and the combo of 100 shot 52/28 put only 52 rwhp... I gonna go to the dyno soon to see if my combo is good for the 100 shot!

 

52/28 should be good for around 100whp, let us know what you find. I'm also running the NOS wet kit and with 47/26 saw around 80whp difference on the g-tech (47 is really 100hp at the crank in theory, 52 is about 122hp crank in theory). I'm not sure how Zex or NX would be different, but as long as you know the fuel pressure (50-51 psi) and nitrous pressure (normally 900-950 if you have a heater), I would think the power gains and jet tuning should be the same across kits? This is a nice calculator to use for tuning and finding jets:

http://www.robietherobot.com/NitrousJetCalculator.htm

 

very intrested in what your dyno will be ...... im looking to go N2o very soon as well ... i was mainly thinking of going NX .... but id like to see your results

 

Darin:
The theory about this is that the "Fogger" of the zex system is a little restrictive... my friend change it for a NOS one and will try it on the dyno with me!!!
How do you know about the fuel pressure? that pressure will be all the time, rigth... because the Z don't have any return fuel line?

 

Yes I believe it maintains a relatively constant pressure, from a couple people I know that have hooked up fuel pressure gauges.

As far as shot sizes and HP, the thing about nitrous that is really nuts is the TORQUE, because that 100 shot is 100hp of injected nitrous no matter what RPM you are at - so at 3500rpm that is more like 150 ft-lbs of added torque. So although say an S/C like the ATI procharger makes more HP, that is way up at 6500rpm. A good shot of nitrous will keep up or even outrun it in the mid-range.

 

Wait to you visit the 150-175 shot's! You'll go weeeeeeeeee!

 

If you dont mind me asking...... where did you purchase it from and how much did it run you?

Also, were there any issues t'ing into the fuel lines? Last I heard there are no fittings.

Thanks

 

"As far as shot sizes and HP, the thing about nitrous that is really nuts is the TORQUE, because that 100 shot is 100hp of injected nitrous no matter what RPM you are at - so at 3500rpm that is more like 150 ft-lbs of added torque. So although say an S/C like the ATI procharger makes more HP, that is way up at 6500rpm. A good shot of nitrous will keep up or even outrun it in the mid-range."


Darin:
I'm with you, the TQ that produce the Nitrous is sweet!


Wadd3456:

I buy it from some member here... you can try summit they have good prices for the system (Wet kit system for FI 6 cilynder)
about the fuel I put the SPX adapter and is the best for it!!!
(search for the Big Bad Nitrous post and you may find more info!)

Oh btw my PM don't work... dont know why!!!

 

Edretti:

for how long do you have the 150 shot now? what size of jets do you use?

Thanks!

 

54/30 are my fuel jet sizes. I've been spraying for about 6 months I guess. Just remember that the estimated shot ratings are not at the rear wheels. For example my 150 shot is actually around 117rwhp. I know that zex definitely overstates the hp. I dyno'd at 250rwhp so that puts me at 367rwhp. I'd say I'm there with the superchargers.

 

all the performance gains are awesome but how much nitrous can the Z's engikne handle? have any of u guys built up your engines?

 

So far the only one that blew did on a 350 shot. It ran 200 shots without issue I believe.

 

Everyone is always concerned about an engine handling nitrous. It is no different then a supercharger or turbo. It's still FORCED INDUCTION. What you have to make sure of (just like turbo or sc) is that the a/f is good. You do that by installing the correct fuel/nitrous jets. Always get a dyno!

 

OK...I went to the dyno and the 52/28 combo was good for 100 whp at 6100 with 12.4 A/F but at 6600 went to 90 whp and 11.7 A/F... little rich at the end but I guess is better that way for safety resons! Ohh... it put 115 WTQ at 5000 rpm's thats pretty good!!!


Edretti:
The nitrous is not like FORCED INDUCTION... the nitrous is like a "additive" to the A/F mix, you dont force the air induction like S/C or Turbos... BTW NOS say that the 150 shot is 61/38... Zex say is 54/30???

 

Well if it put out 115 WTQ at 5000 rpm, that is actually a 109 WHP gain at that rpm (HP=TQxRPM/5252)! That's the nice thing with nitrous - area under the curve - you get a solid (roughly 100hp) gain all the way through most the rpms, not just above 6000rpm or peak as is the case with most mods. BTW the reason it may have got a little richer and less power up top is the bottle pressure was probably starting to fall, given the long run on the dyno. 52/28 is in theory exactly 12:1 (nitrous/fuel mix alone) based on the Z's fuel pressure and a bottle pressure of 900-950, so averaged out with the additional stock air/fuel it makes sense you saw what you saw.

 

I have the bottle heater but I didn't have a chance to installed... the bottle pressure at the time of the pass was 1000 and in the end was 985... that theory of yours apply with only 15 psi lost???
so with the bottle heater it may never go down?
do you think I can go up to 61/38 (150 shot NOS Table) with no problem?

btw my PM don't work... sorry, if you like email me at eo0430@hotmail.com

 

Ah you checked bottle pressure, then forget my theory as 15psi of nitrous pressure won't make any real difference! Perhaps the air/fuel of the nitrous is closer to say 11.5:1, and the stock program is say 13:1 in mid-range (giving you a mix air/fuel of 12.4:1) and when stock program enrichens down to 12:1 above 6000rpm, averaged with the nitrous mix, it gives you a mix air/fuel of 11.7:1, etc.

61/38 - I'm curious where you are getting the table from, NOS? They recommend fuel jets WAY on the rich side to be safe, for exmaple the table I have from NOS shows they recommend a 34 fuel jet with 52 nitrous, and of course you used a much smaller 28 with a good air/fuel. (which is also what the calculator says to use farther up this thread). The calculator says to use a 33 fuel jet with a 61, and it will produce a theoretical 168 crank hp (so maybe 135whp). I believe someone (juicedcoupe?) has experimented with larger jet sizes in this area on the dyno, perhaps he can comment. I think at some point the gains are diminishing due to the engine displacement/design, i.e. a 250hp single jet shot would not give you 250hp on this engine.

 

i was just wondering how much WHP your putting down with that total setup of yours???? must be 360+ hopefully

 

Yes the Z come very rich from the factory... I also retard the ignition -1 to be safe... I know -1 is not a big difference but I was +2 degrees before I install the system so I have to adjust the ignition anyway!

The 61/38 was from some guy that use the NOS table but I dont know for sure!

Anybody knows this info for good?


92hatchattack:

I'm a little lower rigth now but soon I will be 360+

 

might b time for some seperate forums: n/a, fi, nitrous. i would love to see a nitrous forum. hint, hint!!!