Turbo Motor Discussions about aftermarket turbo'd 240sx and Silvias.

spaying and durability

Old Oct 25, 2004 | 05:00 PM
  #1  
chiroke's Avatar
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From: nyc
spaying and durability

sup guys me and my friend have some discussions always about cars and u guys always clear it up. im building up my bottom end with a tomei stroker kits wich is forged and also building the head with .ok here it goes i want to juice my car but i say scence the bottom end is built up it shot take the NOS but he says every time you spray you add 4k miles to the engiene. bottome line if i spary on a built botm is it okay or is it still gonna have killing effects on the engine.
Old Oct 25, 2004 | 08:22 PM
  #2  
carofchoice's Avatar
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From: whiteman afb
dont know much about nos but this i what i have heard. i hear that nos is ok (on a stock engine) if you keep the engine up to par. dont go for long periods of time without changing what needs to be changed. if you can afford to up keep the engine it shouldnt be a problem. hope this helps alittle. if im wrong post the right stuff please.
Old Oct 25, 2004 | 09:28 PM
  #3  
-HyJynX-'s Avatar
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Nitrous, just like FI, does kill your engine's life span...if you don't do the proper maintenance.
Old Oct 26, 2004 | 08:20 AM
  #4  
tErbo b00st's Avatar
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It will kill it about as much as running boost on your engine.

But dont use NOS, its cheating
Old Oct 26, 2004 | 09:12 AM
  #5  
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From: Alpharetta, GA
LOL, your title says "Spaying".

I'd personally would rather neuter but spaying is more effective.


Nitrous on a stocker engine is dangerous. You have to look at it scientifically however.

N2O or Nitrous Oxide, not NOS (NOS is a Name Brand ***RICERS***) is a chemical compound.

2 parts Nitrogen
1 part Oxygen

When you take the chemical compound and detonate it, keeping in mind that N20 in and of itself is not volotile, it seperates and forms pure Oxygen. This oxygen is used by your engine to increase the output of its performance. The Nitrogen is purged and emmited into the air.

Also, keep in mind that this oxygen is SUPER-cooled so it also effectively lowers the core and, in turn, the overall temperature of your engine. And, as most mechanics and racers will tell you, a cool engine, not cold engine, is a happy engine.

Knowing this, the danger lies in the fact when people take N20, (usually ricers and posers ) or simply people who just don't know any better, and they run it at a rate which cannot be compensated by their current injectors or injection rate.

What that does is rushes oxygen into the engine at a higher rate than it is recieving fuel. This condition is known as "Full Lean" when this condition is present detonation occurs within the cylinder housing.

This is where the damage takes place within your engine.

Why?

Because, instead of having a series of controled flame-fronts, you begin to have a series of tiny explosions inside of your engine and housings where the air-fuel mixture take place. This can do as little as simply fry a valve seal or it can do as much as (in the case of V6-V12 SOHC engines) push a connecting rod through the engine block or head, which is significant because if you've ever held an engine head you know just what it is made of. You can litterally shoot an engine head and not do much damage to it. (Given the caliber isn't too high, but that's another topic of discussion)

I digress,

The common misconception with engines is that the pistons are propeled by a series of small explosions. This is wrong in a sense that the scientific definition of an explosion is any type of matter expanding at a high rate of velocity. In other words, anything getting really big really fast. This isn't, or shouldn't, occur within your engine . What is happening, or what should be happening, is that the air and fuel combine in the engine and are sparked. This spark creates a micron-flame and this flame expands (at a slower rate than an explosion) and drives the piston to BDC (bottom dead center).

For you number buffs here's basically what's up.

An explosion expands at 30,000 meters per second per second.

Meaning the rate of acceleration is 30,000 meters per second and for every second elapsed, the rate is increased by another 30,000 meters per second.

A flame front occurs at a rate of roughly 3000-5000(depending on cyl bore) meters per second per second.

You can see that this is a DRASTIC difference, if your pistons were to move under an explosive rate, you would push your engine apart on start up.

So, what do we have now?

We now know why nitrous is dangerous on a STOCK engine. But that's only if you do NOT know what you are doing and/or how you want your application to be. If you have 250cc injectors and you are running 130ccs of N20. You are fine. Spray all day.

But, if you have the same injectors and you are running 500cc injections of N20, then you have doubled the amount of oxygen going into your engine as compared to fuel intake. Now things are dangerous.

If you want a SAFE nitrous application you have to remember that your injectors have to, and I STRESS HAVE TO, out perform the amount of N20 that you are running.

So, lets say that you are running 500cc injections of N20, you might want invest in stronger injectors than 500cc. If that's not pheasable for what you are doing with your vehicle (e.g. daily driver) then lower your N20 injection rate.
You see.


If there are any questions about my explanation, then just ask and I'll be more than willing to answer them.

I apologize for the length, but even with the length of this, it's EXTREMELY CONDENSED, there is a LOT more science and mathmatics that go into N20 and it's applications. So instead of writing 5 pages worth of information, I figured to just write about what applies to this topic.


Take Care,
-Dave
Old Oct 26, 2004 | 02:49 PM
  #6  
chiroke's Avatar
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From: nyc
nice answer explained to me alot. that answer should be a permanent post how nitrous works.
ps. im a naturral type-o'ist
Old Nov 2, 2004 | 07:59 AM
  #7  
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From: Raleigh, North Carolina
Wow, thanks for that explination, i just learned more about nitrous than ive learned ever. Yeah that should stay up here to clear up anyones questions about how it works.
Old Nov 2, 2004 | 11:20 AM
  #8  
USMCDrifter's Avatar
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Hey, no problem gents,

I figured I might as well make it a good explaination so that it will clear up any misconceptions about N2O or it's applications and properties.

I'm here to answer your questions just throw them at me, and if I can't personally answer them, I'll find someone who can.


Take Care,
-Dave
Old Nov 4, 2004 | 01:14 PM
  #9  
Project Cheap13's Avatar
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From: Panama
Nitrous spoolum big turbo say Chief smacka***** from the slapahoe tribe.

Sorry

Nitrous is good mmmmkkkaaayyyy.
As long as your not stupid with it & do your homework.
Old Nov 5, 2004 | 06:16 AM
  #10  
srslider's Avatar
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From: Seneca, SC
damn, you know your stuff on n2o. nice, very impressive
Old Nov 5, 2004 | 08:51 AM
  #11  
USMCDrifter's Avatar
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From: Alpharetta, GA
Originally posted by srslider
damn, you know your stuff on n2o. nice, very impressive

Thank you,

All I do is read about how these magnificent little metallic things we call "engines" work.
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