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Nitrous 101

 
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Old 04-24-2009, 11:58 PM
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Nitrous 101

this might actually help any of you thinking about nitrous. i found this because i dont know all there is to know about nitrous but since i dont think anyone on this forum really does but at least this is clear and understandable.

this quote is from a friend of mine on b20vtec:

Nitrous is one of the most common power adders. It's just as safe as a turbo or supercharger. Just as a Turbo set up needs supporting mods so does Nitrous. When installing a nitrous kit it is important that you have everything you need to get the most "bang for your buck". When you buy a typical kit for your car you get "everything" you need to spray....but unfortunatly you don't. Most common problems on a sprayed vehicle is leaning out or over timming. Their are a few very simple solutions for each of those that will save your vehicle and keep it running strong.

To start, their are multiple different types of nitrous setups such as a fogger; foggers are kits that use a nozzle that sprays into your intake kit before your throttle body. Plate kits are also commonly used, these are plates that sit between your throttle body and your intake manifold and spray in. I cannot mention the first two with out mentioning a direct port nitrous system. A direct port kit is a nitrous system that has a seperate nozzle for each cylinder. This allows best distribution in each cylinder. In addition to those, dual stage (two different sized shots) are another common way to gain power. Dual stages are setup up to run a smaller shot in lower gears and a larger shot up in the higher range. Thus allowing you a boost in power through all gears. By keeping the shot small in lower gears allows you to maintain traction yet still get the added power, and as you get to higher gears the seconde stage engauges and gives you a bigger power boost.

First, if you are running a dry shot (no fuel), it is recomended that you upgrade your injectors and have a tune for extra fuel. If you plan on running a wet shot (both fuel and n2o) it is recomended you upgrade your fuel pump in order not to generate a lean condition. It is also highly recomended that you run a FPSS (Fuel Pressure Safety Switch). This is a switch that you put in-line of your ground wire. It works like this; you set it a specific fuel pressure, and if it drops below that it will break the ground and turn off the nitrous, saving you from a lean condition.

Another common downer to running nitrous is that you have to remove timming when you spray. Alot of people think that mean your car will not be at it's full potential when on motor. Not true, using an ignition timming retard will allow you to cut timming while on spray and allow your car to run at it's full potential on motor. A rule of thumb to use it to cut a degree of timming for ever 50 shot, but depending on your setup and tune, that is not always nescessary. Running a colder pulg is also very important. What ever plug your are running now, once on nitrous you should use a step colder plug, which is similar to when you run boost. Now mind you with all those precautions it's not gaurenteed that your motor will not lean out or detonate, but it is something that can save you from potential problems.

Nitrous activation is next, once your kit is installed and your ready to go, but what activates it? Some of you are interested in momentary buttons(like in Fast and the Furious), but the most sucessful/common way to do it, or should I say the most popular ways to do it are as follows. WOT (wide open throttle) switches and TPS switches are the most efficent form of activation, as soon as your at full throttle that engauges your spray. Along with that a window switch is as a good idea, this keeps the nitrous from comming on too early ( you shouldn't spray below 3000rpms) and from staying on too long, it also prevents nitrous back fires if you miss a gear or hit the rev limiter.

Now that your activation is ready, bottle pressure is another signifigant factor, ideal bottle pressure is between 750psi-1100psi. If you pressure is to low, you will not get good enough flow out of the bottle. If too high, too much nitrous can be a problem as well. Thats why 90% of nitrous users monitor their bottle pressure and use a bottle heater or bottle blanket to keep their bottle at an ideal pressure and temperature.

A common question when using nitrous is how much can I spray. Nitrous is very similar to boost in many ways. It shares the same problems as long as the same rules. You don't push alot of boost through a stock motor, just like you don't spray alot of nitrous through a stock motor. You use what will work for your setup. Their is no such thing as a safe shot. It what will work for your setup. Depending on your compression and tune rules what size shot to run. Your not going to run a 100+ shot on a stock motor, it's not recomended. Just remember nitrous is an effective power adder and when used right and safely can be the ultimate source of power for your vehicle....

Well I hope this write up is helpful to you and it can put some of you in the right direction.
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Old 04-25-2009, 01:30 AM
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Re: nitros 101

so i'm buying a bare h22a Closeddeck block.
If i darton sleeve, pistons, rods, bearings, rings, and cosmetic headgasket(APR Headstud)
minus what im doing to the head, how would that hold to a 75 shot?

i've been told Forged is a must because the N2O can actually aid in the process of Melting the piston.
should a prticular set of rings be used?
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Old 04-25-2009, 08:16 AM
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Re: nitros 101

if you build your bottom end... like your saying you will be fine. i would use lower compression pistons to be able to run what ever amount of nitrous safely. if its built you will definitely be able to take a 75shot and even more. forged pistons is the way to go... as far as rings... whatever rings that come w/ the piston set is all you need. rings are rings... as long as gapped correctly when the piston are installed you should have no problems there.
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Old 04-25-2009, 04:31 PM
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Re: nitros 101

Good writeup, I didn't know that stuff about nitrous...I thought you could run nitrous on a stock motor and be okay, I thought it was a safe thing..But obviously it's not.
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Old 04-25-2009, 06:31 PM
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Re: nitros 101

good stuff bustr i wanna start my build already ...lol but low on cash rite now hoping to start in the winter so it can be ready for next summer .....
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Old 04-26-2009, 03:54 AM
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Re: nitros 101

I want nitrous. LOL.
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Old 07-20-2009, 08:20 PM
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Re: Nitrous 101

ive heared the 22's injectors are useless at around 250hp

what if you increase the pressure of a already eCtune'd ecu to run a bigger shot?

my bottom end is mild built good rings gaped for nitrious and designed for torture, coated type s 11-1 pistions
u think 11-1 is to much to spray more than a 50 shot wet on a motor you want to last.....a year or two....
its also not sleeved
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Old 07-21-2009, 09:36 PM
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Re: Nitrous 101

honestly i think a 50 shot is pushing it. w/ that high of a compression boost/juice is not going to be as safe as if you were running lower compression.
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Old 09-03-2009, 10:32 PM
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Re: Nitrous 101

even if i continue to pull timing?
the other thing that needs to be considered is the elevation is rediclous up here...
air is so thin ive seen cats running 100 shots untuned dry for years....
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Old 09-03-2009, 10:40 PM
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Re: Nitrous 101

Good post Bustr, +rep. Lots of questions of mine answered, although I don't think I'll ever juice my car.

Are you bootsed as well as running spray?
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Old 09-03-2009, 10:56 PM
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Re: Nitrous 101

Quote:
Originally Posted by DJ Prelude View Post
Good post Bustr, +rep. Lots of questions of mine answered, although I don't think I'll ever juice my car.

Are you bootsed as well as running spray?
no... but it has come across my mind. one thing i think im going to do is the cry02 on my front mount.
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Old 09-20-2009, 10:55 PM
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Re: Nitrous 101

Quote:
Originally Posted by Bustr View Post
honestly i think a 50 shot is pushing it. w/ that high of a compression boost/juice is not going to be as safe as if you were running lower compression.
would an internally stock h22 handle a 50 shot?
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Old 09-21-2009, 07:52 PM
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Re: Nitrous 101

yes it would.
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Old 09-22-2009, 10:44 AM
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Re: Nitrous 101

my mild built taking a 100 shot without a problem.
just be shure to back down some timing.
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Old 09-26-2009, 02:06 PM
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Re: Nitrous 101

has any1 NOSed a f22???
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Old 09-13-2010, 10:00 AM
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Re: Nitrous 101

so what size throttle body should i use on my h22a j-spec i was going with a 70mm but was told it was to big the stock size is 60mm i think? i am planing on running a 50 wet shot of n2o. i already have some mods done, i have a header, stage 2 crower cams, adjustable cam gears, act stage 3 clutch, injen cold air intake, and a tuned ecu. i have looked to find out what i need, i almost bought a skunk2 pro series intake but after some research decided not too, but i havent found anything on throttle body sizes

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Old 10-12-2010, 09:12 AM
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Re: Nitrous 101

Quote:
Originally Posted by sleepy5950 View Post
has any1 NOSed a f22???
after reading this I think I'm going to
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Old 01-07-2011, 09:14 PM
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Re: Nitrous 101

After reading this I might put a 50 shot in my lude now and wait on putting my car on boost for a while.
If I ran a 50 shot like once a month u think it would last like a year? Stock motor with a couple of mods listed in my signiture
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Old 01-07-2011, 09:15 PM
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Re: Nitrous 101

After reading this I might put a 50 shot in my lude now and wait on putting my car on boost for a while.
If I ran a 50 shot like once a month u think it would last like a year? Stock motor with a couple of mods listed in my signiture
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Old 05-27-2014, 10:39 PM
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Re: Nitrous 101

Great information.
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