I'm thinking of trying the old Nitrous out on the xfire but not sure about the electrical nightmare that might occur from it. Anyone out there have any input on this or tried it or even have it right now?

 

i had nitrous on my Miata; and i did my research beforehand... it was a fully automatic wet system, NX 50-shot, that sprayed if and only if:

(1) the system was 'armed' (main switch turned on)
(2) your foot was on the floor (full throttle)
(3) you were above 3K rpm (selectable via rpm switch box)
(4) the fuel pressure did not drop below a predetermined amount (fuel pressure switch)

i know i have a wiring diagram somewhere if you want me to look. i can also go into more detail if you're interested.

hence my user name, and the leftover license plate that i still have on my crossfire.

 

here is a nitrous owner above...

 

Andrew, Do you have some more details on the 125 nitrous shot you are running. How does the car handle it? Any 1/4 mile times yet?

 

acutally... kwiktsi has the nitrous system...not me (see prior post).

 

Kwiktzi or anyone else that has NOS. Any times from the drags as far as 1/4 mile?

 

Had it on a couple of past cars including a 2000 celica project...but see no use for it on a stock crossfire. Difference is that with the celica I had quite a few other performance goodies added to the engine so the NOS was just an occasional helper that I used sparingly.

Since the choice of aftermarket parts for the base Crossfire's are very limited, you would almost always have to be on the button. Besides the reoccurring expense of bottle refills, some increased wear and tear (no matter how well built the kit or install was) just in the fact the way NOS works will happen; so good luck with any kind of warranty repair once the dealer sees that big blue bottle in the trunk...

 

not installed on the crossfire, but a 50-shot wet NX kit (coupled with I,H,E) brought my '01 Miata down from a stock ~16.0-sec 1/4 to 14.5-sec. i would say it was better than 75-80% due to the nitrous.

 

Thanks guys, but I am really curious just to see what gain someone got from a stock crossfire, but I would expect a 50 shot would lower the quarter by about 1 second. I am very knowledgeable on using Nitrous itself, I had it on 2 prior cars and contrary to the nasty rumors that NOS blows up engines and increases wear, that is especially not true on a 50 shot. All Nitrous is, is a chemical supercharger or turbo, absolutely no difference to your engine than adding a turbo or supercharger. Both ways you are increasing the oxygen that can be burned in combustion. With a supercharger or turbo, you force it into the same cylinder volume under pressure with Nitrous you are adding more oxygen to the air mix chemically. The only way Nitrous wears or blows an engine is when there is not the right amount of fuel added to compensate for the extra oxygen, but a turbo would cause the same damage if a rising rate of gain fuel pressure regulator wasn't used or the stock fuel pump couldn't keep up. The NOS bad rumors come from the guys taking short cuts and not upgrading the fuel pump, when they go to a 75 shot or higher, or not get the jetting the fogger correct, both which cause a lean condition and possible damage. Also, not retarding the timing when using a 75 shot or higher, which causes an extreme heat increase from the excessive compression change (retarding the timing 3-4 degrees for every 40 hp of NOS, decreases the compression to compensate for the increase). As far as warranty, you just have to be smart and remove the tank and lines before bringing it in (cover your tracks). I ran 200 bottles through my '85 Supra, and never had a single problem or sign of engine wear. I sold the car with 250,000 miles with the original bottom end and it was still running strong and not burning any oil. I had a '93 MR2 turbo, that I also put 30 bottles through with no problems (which was a 12.2 second car) My friend is still driving the car today as his daily driver and it runs like new. Again, just be knowledgeable on what is happening when you use NOS and install it right, but also check the plugs after a night at the drags to make sure all cylinders are getting the right amount of fuel.

 

Not sure why your asking about details on the Crossfire since if your are already familiar with NOS, the setup in most vehicles is pretty universal. Electrical gremlins are common in M.B. cars without mods so this factor might be increased with NOS.

Also you were first talking about a 125 shot and now a 50 shot...sizable difference along with the effects on your engine. Like I previously posted, I have also used nitrous in the past and can tell you using it frequently especially in the higher shot range, will cause engine wear.
Your comparison to a supercharger or turbo is not valid since both of these provide power in a somewhat linear fashion compared to the "hit" of a nitrous shot. If your familiar with the way NOS works, your aware of how this "instant" power can adversely effect an engine. Added to the fact that most of the time factory cars that are supercharged/turbo'd are usually reinforced in one way or another to help compensate for the increased power.


Are you going to go to the trouble to remove everything when you take if your car even for unrelated repair issues ?...since you know the car will be flagged to you having nitrous if they see it...on one of mine. I integrated things like a gas pedal activation switch, bottle mounting brackets into the floorboards, and the spray nozzle which was drilled into the aftermarket metal cold air intake. Would be quite a pain to uninstall and reinstall these things ever trip to the dealer. Even without all that stuff in there, the dealer is going to start snooping to find the cause if you come in with burned valves, pistons, etc...

So, as in most cases, if this was in an adjunct to other full time power mods already done to a vehicle (i.e. turbo/super kit, intake, pulleys, headers, etc), it would be the next logical step...but on a new stock car, esp. one with that was not designed for high-performance; your risks outweigh any real net gains...

 

Teach the controversy RESPDOC... LOL

 

I was initially asking about the 125 shot because somebody posted they had one, but I would only be interested in the 50 shot and limited use. You are correct about the fact that nitrous shocks the system when triggered, but the reason I didn't mention that is because if you know enough about Nitrous systems, which it sounds like you do, you can also install them with linear phase step up solenoids, which, like my initial point would make them just like a turbo or supercharger (gradual increase in compression rise). But again, a 50 shot, occasionally uses, on a 220 hp car would have no increase of wear to the engine. Most engines are built, with a 25 - 30 % robust safety factor, for increased reliability, and I would think MB, has at least that safety margin. On the warranty topic, There is almost no chance of an serious engine failure with a 50 shot, unless something gets overlooked from ignorance, but in the unlikely event that the engine blew up, sure i would remove everything, better than paying over $5,000 in a repair.

 

Have you installed it yet?

 

if something happens that bottle comes out just as fast as it went in, and thats why you decide where you inject so that can be replaced also and take it back, now WAY of knowing. anyway i am really looking for where to inject the nitrous, and where to get the fuel from, these will help alot and pics would be great anyone???, thanks