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Old 07-24-2006, 12:39 PM   #1
IllNastyImpreza
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Default nitrous vs water/meth injection

ok So I figure that iether one will produce a little more horsepower... iether due to the cooling effects or ability to burn more fuel.

If I go water/meth injection It will greatly reduce my combustion temps...and raise my octane rating...enableing me to run higher boost on pump gass.

but If I go nitrous I will absolutly need to run race gass and upgrade my cooling system...

my car will be mostly street driven...raced on the weekends....1/4mi autocross whatever...

just lookin for some ideas....whata u guys think?
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Old 07-24-2006, 01:31 PM   #2
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This is not the answer you want, but your question would be like saying..."should I get a bigger turbo or an intercooler".

I only say this because the two mods are not related to each other.

If Horsepower is your only goal, Nitrous would be your best bet. If you want HP, safety and to be able to make more out of the mods you currently have, go with the water injection.
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Old 07-24-2006, 01:40 PM   #3
hippy
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If you ran n2o and water/alc injection, you wouldn't need upgraded cooling system or higher octane. A nice little dual stage injection system(one of the stages to compensate for the n2o) and a single nozzle dry kit could work really well together, be easy to tune for when running n2o and when not, and cost about the same as most controller injection systems(without n2o). I wonder how much more power you can get from a 2 stage liquid injection system+n2o over an adjustable pump control system for about the same price?

peace
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Old 07-25-2006, 11:46 PM   #4
proctort
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i'm in the same boat. i'm looking to get a little more power and for the price the nitrous seems to be the way to go. but, being new to this and having used nitous in the past i'm not sure if i'm going to get caught up in a snoball effct that is going to cost me more money just to get it to work right. if you find anything out let me know.
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Old 07-26-2006, 01:12 AM   #5
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The systems are really not comparable as they will be used in drastically different circumstances.

Almost no one will run a nitrous system on all the time, and even if they do the bottle will be empty in pretty short order. Active street racers might go through a bottle or 2 a night when they are out looking for action. "IF" your running a 20 -35 hp shot you might use it like a passing switch but even then it would be intermitent and not for continuous use.

The WI or Alcohol injection systems are on the other hand pretty much set up to kick in any time you go WOT and as such they are available all the time.


Get the WI/alcohol injection system of your choice then add nitrous if you need it for the drag strip.
A properly set up nitrous system is not cheap if you install it with the safety switches and such that you should use. It will cost you quit a bit more than a simple WI/AI system and be of much less use.

Larry
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Old 07-26-2006, 12:33 PM   #6
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Do not go with NOS, you will blow it up sooner than you think. I ran NOS on my bugeye, ZEX and I accidentally hit the power toggle switch with my knee and when I went into WOT the Zex kicked in with the 100 shot, less than 1 second blew all 4 piston rings. Luckilly enough it didnt throw a rod, after replacing the main bearings and seals, getting a hone and new con rods the engine was rebuilt and shortly later I sold the car and got my wagon.
I am now running the coolingmist kit and I love it.
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Old 07-26-2006, 01:37 PM   #7
reid-o
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Quote:
Originally Posted by hippy
If you ran n2o and water/alc injection, you wouldn't need upgraded cooling system or higher octane. A nice little dual stage injection system(one of the stages to compensate for the n2o) and a single nozzle dry kit could work really well together, be easy to tune for when running n2o and when not, and cost about the same as most controller injection systems(without n2o). I wonder how much more power you can get from a 2 stage liquid injection system+n2o over an adjustable pump control system for about the same price?

peace

I'm not so sure if this is such a great idea/advice for someone asking about nitrous, but it may be okay advice for an experienced nitrous user. Id be concerned of the consistency of flow rating from the alcohol injection. In a wet kit, the fuel side is consistent because the pressure is regulated off of the stock fuel system. I wouldn't trust pressure fluctuations from the A/I, as I'm very familiar what happens when you don't run fat with nitrous, what happens when pressures become inconsistent and what happens when you run too fat up top.

Nitrous is pretty damn safe when you spend the money to make all thigns consistent.

It seems like a great idea, but I've never seen any data of the consistency of line pressure in w/i (although I do run it). It may be stable enough to ramp up timing and add boost pressure, but not when the combustion event rapidly increases, as is the case with nitrous.

Have you tried this?
It sounds interesting, but since my STI is now my daily driver, I don't want to be the first to be the first to try. Maybe if I find a project car.
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Old 07-26-2006, 03:35 PM   #8
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You'd only be using the n2o at hard throttle, and like you said it could be safe and easy when done correctly. This would mean that if you used it with one stage of a two stage water injection system, you would only use the n2o above say 14psi and fluctuations in boost between that and even 28psi wouldn't change the flow of the water injection system that much. At the same time, the n2o injection would also be seeing the same change in pressure. It obviously wouldn't be effected as much since it's running 800psi instead of 100psi, but imo this type of system would be more consystent then you think. I've run this type of system, but just with water injection(no alc), and it's a 1 stage controller type of system(kinda) not a 2 stage system. No problems with consistency so far, and I'd think a regular 2 stage kit would be easier to tune because the flow is more predictable.

peace

Last edited by hippy; 07-26-2006 at 07:32 PM.
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Old 07-28-2006, 12:05 AM   #9
IllNastyImpreza
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wow...some good ideas. I have thought about the use of both in the past. But I was thinking the nitrous would be more just to spool up the turbo. How crazzy would that be...2 stage alcohol/water injection in conjunction with a masive shot of nitrous!? That'd blow the gears right off MY car...

as was stated above...I might just try the alcohol/water injection first...as it is much cheaper and safer to start out with!....I can always go nitrous down the road
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Old 07-28-2006, 08:18 AM   #10
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I can add some input as I have been running this combo for a little while now, I started off with a 35 shot and quickly moved up to a 75 shot on the evo which lead me to blow my stock clutch at the track, I just ordered an exedy twin plate and will be going back to the track shortly. If anyone has any questions about this combo please let me know. I want to a have it in the car for a little while longer before I swear on it but so far so good...
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