I'm new to NOS so I don't know much about it. Is there a certain brand that you would recomend? What is the difference between a wet and dry kit? How long will a bottle last if I run the NOS for a 1/4mi at a time, with a 100 shot and what size bottle, how much does it cost to refill the bottle? How much do the kits cost, and how long do they take to install? Is it hard to tune? Sorry for all the Q's, any response would be helpful.

 

I have used the NOS and Nitrous express brand kits. Me myself,I like the NX kits better than the NOS. IMO the NX kits have better quality parts. A wet kit adds more fuel while also adding N20 while a dry kit only injects N20. I like the wet kits,I feel they are safer and almost idiot proof. How long the bottle will last depends on the length of time it is engaged and how big of shot you are running. Around here I get my bottle filled for $3 a pound/30 bucks a bottle,but I have seen it be as high as $5 a pound in places. It will take you a the good part of a day for the install to do it right. Thats if you go all out with the purge,N20 pressure gauge,bottle heater etc. etc.

 

Superman

How much did your NX kit cost for everything you bought? How many pound bottle do you have, about how many 0-115mph runs do you think you get per bottle if you were to guess? Where can you fill the tanks? How big of shot are you running, do you have it programed to activate only in a certain RPM range? Thanks for your response.

 

I have the NX 20920 Wet kit in my GTA.


I've got about $1300 or so invested in it.. here's the breakdown:

20920 base kit $460 (ebay has them ALL the time for this price, retails for about 489 most other places)
15lb bottle upgrade $60
iceman purge kit $80
NX bottle heater $175 IIRC
NX FPSS $40
NX blowdown tube $22
Window switch $90? (forgot how much I paid for it ..)
the other $ comes in from prepping the car for N2O...
SVO 24# injectors $155
elec fuel pressure gauge $196
mech n2o pressure gauge $75
tubing for n2o pressure gauge $60
"T" fittings for n2o/fuel pressure setups $58

Mine is currently jetted for a 150 shot, at 150 shot, you will use about 1.4lbs for every 10 seconds of spraying.

You will most likely NOT be spraying for more than 10 seconds at a time, 1/4 mile run, etc... I know I spray at the beginning of 3rd, unless I'm on slicks, then it's upper 2nd gear.

Just noticed you said 100 shot, it's about 1.2lbs/10 seconds at 100 hp shot

Nitrous refills are 2.49/lb here at a good speed shop, you can expect to pay anywhere from 2.29 -> 3.39 for nitrous, depending on the shop. My experience is that the newer import shops charge more...

The kit is relatively simple to install, took me an afternoon. And that includes running all gauges, injectors, etc. And my switch/led panel.

Tuning is a little more difficult. I tune with a laptop, and Craig moates software to make sure I'm not running lean.. And burning custom proms is extremely helpful. You don't have to get this in depth, but I do as a sense of security (and the thirst for 10s)

Just make sure you don't go lean, and everything should be fine.

And, as a side note, those Air fuel ratio gauges from autometer, nordskog, etc for $50 are pretty much worthless... O2 sensor based gauges are not reliable at all, although it is better than nothing. I highly reccommend dyno tuning with a wide band o2.

 

0-115 with your mods sounds quite high on a 100 shot! out here it will cost most over $4.25 lb. not cheap by any means. typically lasts around 8 times depending on the average length of runs....of course this is at optimal pressure.

i pretty much agree with everything stated above, i was using the NOS brand kit and had no problems with it, it initially is more expensive than the NX but in the long run it's cheaper. as far as quality, i feel they are the same; i do prefer some of nx design better, but they both do their purpose at least in the single stage tpi area.

safety equipment is the biggest thing, 12 sec basically described the general list. the only thing i would add to the list of things to buy would be possibly a fuel booster, your fuel system is of the biggest importance; you go lean even once and bad things can happen.

the only thing i disagree on a minor point is the autometer air/fuel guage. i definately wouldn't run the car without first initially tunning on a wideband, but with that aside the air/fuel guage is something that will give you a general idea (it's main point) at 1/10 the price of a wideband, it's the next best thing besides permanently installing a wideband which is costly.

again, N2O is very cost effective and fun. just about the best bang for the buck if you want to put it that way. but, it can be dangerous in the hands of idiots.......read up and become knowledgeable before you run out and do anything. this way you won't hurt yourself or someone else.

 

Kandied91Z28

What do you mean by 0-115 seams high for my mods with a 100 shot?

Before I would put NOS on I am going to put some aluminum heads on with an LT1 intake and a 58mm TB, different cam, and headers. So I figure this will put me me in the low to mid 12's, I would like to hit low 11's on the juice, so I'm thinking of a 150 shot since I have all forged internals. I already have 24lb Holley injectors and a high flow fuel pump. Are you running NOS, what shot, what is the difference in the 1/4mi?

 

Just talked with Nitrous wharehouse here are the prices I was quoted. NX system 20920 with the Gen X 2 package (bottle heater, blow down tube, pressure gauge, fuel out cut off switch, and a cuple of other things) was $799 plus $17 shipping to IL. Here is the web address to check them out. WWW.nitrouswarehouse.com .

 

Thanks for your help guys.

 

I heard from some tv car show on tnn that nitrous is actually under rated, It adds more horsepower because it also has a cooling effect on the engine that an add as much as 60 more Hp on a 150 shot.

 

huh?

explain a little more... So you're saying a 150 shot really adds 210hp ? Not really. I've seen it many many times dynoed, and the NX kits put out within their advertised hp rating at the rear (2% of the advertised)


not advertised + 60...

 

I just heard it from some tv show.
It seemed to make sense. They said while using nitrous, there was a cooling effect on the engine from the nitrous. And the colling effect added more horse power than the nitrous was rated at.

 

well.. you were watching a tnn show, thats your problem right there

the nitrous manufacturers, dynotest their products to develop jet sizes that add enough nitrous to add a consistant and predicable power increase, so that proper tuning adjustments can be made by the operator.

yes nitrous has a cooling effect that helps to increase power, that fact isn't unknown to the nitrous manufacturers and they have tuned their jetting to compensate for that

so a 150hp shot will give approximatly 150hp increase, give or take 10hp.

 

Oh no, not this 2% power increase blasphemy again!!

 

hi GFF

 

Just wondering was that made of gold errr something?

 

originally posted by trux:
On a naturally aspirated engine it would probably be safe to say that a rated 150 shot of nitrous would perhaps break down like this...
100-125 HP from the increased air/fuel mixture, and 25-50 HP from the cooling effect, for a total of around 150 HP.
Some kit manufactureres rate their kits as crankshaft HP, some are rated at rear wheel HP.

Now, on a forced induction (ie turbocharged or supercharged) engine, the cooling effect makes even more HP, like an intercooler. So in that case even a small shot, like a 50 HP rated shot may actually make 75-100 HP and the bigger the shot, the bigger the cooling effect.

As far as brands, quality, and service goes I like Nitrous Express.

I suggest you use the search function of this site to find previous posts, you will pick up a bunch of opinions. Try searching for NOS and Nitrous Express (or NX) at the same time.

 

I could be way outta line for saying this...but i think that there are too many tuning factors from car to car to make a 2% claim.

Fuel and timing on cars, not just from being modded (not to mention those running non-factory motors), but from age as well.

Outside variables as well, such as bottle pressure, outside temp, elevation, etc.

I think hitting 2% is like saying one eprom is perfect for every car. Everyone is going to have to test and tune a nitrous kit for their specific car.

Again, this is just my humble opinion. No graphs to prove my point.

 

You're right Omar, there are many, many variables.
That is part of their guarantee. Your vehicle needs to be mechanically sound and in a correct state of tune to begin with, and you must run consistant bottle pressures of 950 PSI to 1050 PSI, and run the correct fuel pressure, as per kit instructions, and as per common sense dictates.
Of course, anyone running nitrous at all should already fit that description. Too many don't though for some reason?!? They bolt on a kit, don't install a bottle pressure guage, have no idea at all that the bottle pressure is way low, they have the fuel pressure jacked way up with an adjustable regulator, they install 100 or 125 HP jets, and actually make only 50-60 HP from shooting less nitrous, (or/and too much fuel) and from the way over rich condition that causes. That's not the manufactureres fault, it's incorrect usage.
Their guarantee doesn't say that no matter what, if you bolt on a kit you will definitely, no matter what, under any condition, run within 2% of the rated HP. What it does say is, they do guarentee that if You run less than within 2% they will help you find out why not and get you there. Maybe it's incorrect bottle pressure, incorrect fuel pressure, incorrect timing, or something else someone is doing wrong, but NX will help them figure out what they're doing wrong. If it's a problem with the kit, they will fix it, if it is something you are doing wrong, they will tell you and you must fix that.