just in case some of you dont understand and think that a nitrous motor is still N/A then ill clear it up.

a naturally aspirated engine pulls in(by way of the vacuum created as the intake valve is open and the piston travels to BDC), without asistance, air(which is 78% nitrogen, 21% oxygen, and less than 1% argon, the rest is made up of very small amounts of other gases) and uses that for combustion.

nitrous puts more oxygen into the intake charge(and as a result of the pressure drop as the nitrous is sprayed it also cools the intake charge which makes the intake charge denser). so more oxygen in the intake charge, combined with the proper amount of fuel, compressed, and ignited at the right time gives more power. forced induction pushes more air into the cylinders which combined with the right amount of fuel, compressed, and ignited at the right time gives more power. the ONLY difference is that nitrous does not pressurize the intake air.

sorry for the rant, just one of those things that bugs me. for anyone that wants to know about nitrous, the all motor forum is not the place.

 

no increase of pressure in IM when using nitrous, so by my opinion it still N/A

 

IIRC some big power n/a builds produce positive manifold pressure

 

no it definately is not.
technicallities or not.

 

That is tru.. very well designed N/A motors car see pressure at high rpms.

And also the N/A motor does not draw air in from vacume, rather atmospheric pressure..
Its a petpeeve of mine when people say that all motor sucks air into the engine... it allows the atmospheric pressure let air into the motor

 

Who cares?

 

like its been said already nitrous does not pressurized the intake system. so this means it is not a forced induction setup. And last i checked there is no nitrous section on honda tech so where else would it go.

Based off the fact that you still have to build a motor for nitrous if you want to do it correctly and alot of the build is similar to a all motor setup. So the most logical place for nitrous threads to go would be all motor.

Just my opinion and i am open to other peoples opinions if you think that i said something that is infact wrong.

 

lol
your lungs suck the air in by creating vacuum
same sht...
by creating vacuum in one place you let the atmospheric pressure fill it in order to even out the pressure difference,

so in a simple folk's language, YOU SUCK air in...
when the cylinder travels from tdc down it creates vacuum and SUCKS the air in thru the valve opening

but to argue that point.
nos is still naturally aspirated.
you just add another chemical in the mix.

thats why its called FORCED induction because you force the air into the cylinder by creating higher pressure.
nos spray is just a spray, just like fuel,
if you consider nos to be not NA then theres no naturally aspirated engines in existence since they all spray atomized fuel into the air intake.


but yea to summarize my post: like the eg18 said "who cares"

 

I've always said that there should have been a forum dedicated to nitrous in here. Most people incorrectly/ignorantly lump it in with forced induction. The way you set a motor up for it and the way you tune the system and car is different than a forced induction car. It's this type of discrimination that keeps nitrous users in the dark and why so many people will have trouble with running it without damaging something.

It is quite common for the average "all motor" person to run nitrous so that's why nitrous questions often pop up in this section. Nitrous is to the Forced Induction section what D-series engine builds are to the All-Motor section and that's unfortunate.

 

Naturally Aspirated:
A naturally-aspirated engine is one common type reciprocating piston internal combustion engine that depends solely on atmospheric pressure to counter the partial vacuum in the induction tract to draw in combustion air. This is in contrast to a forced induction engine, in which a mechanically-driven supercharger, or an exhaust-driven turbocharger is employed to facilitate in increasing the mass of intake air beyond what could be produced by atmospheric pressure alone.

In a naturally-aspirated engine; air for combustion (diesel cycle in a diesel engine, or specific types of Otto cycle in petrol engines [aka 'gasoline engine' in North America] - namely gasoline direct injection), or an air/fuel mixture (traditional Otto cycle petrol engines) is drawn into the engines cylinders by atmospheric pressure acting against a partial vacuum that occurs as the piston travels downwards toward bottom dead centre during the induction stroke. Owing to innate restriction in the engine's inlet tract which includes the intake manifold, a small pressure drop occurs as air is drawn in, resulting in a volumetric efficiency of less than 100 percent - and a less than complete air charge in the cylinder. The density of the air charge, and therefore the engine's maximum theoretical power output, in addition to being influenced by induction system restriction, is also affected by engine speed and atmospheric pressure, the latter which decreases as the operating altitude increases.

Most automobile petrol engines, as well as many small engines used for non-automotive purposes, are naturally-aspirated. Most modern diesel engines powering highway vehicles are turbocharged to produce a more favourable power-to-weight ratio, as well as better fuel efficiency and lower exhaust emissions. Turbocharging is nearly universal on diesel engines that are used in railroad, marine engines, and commercial stationary applications (electrical power generation, for example). Forced induction is also used with reciprocating aircraft engines to negate some of the power loss that occurs as the aircraft climbs to higher altitudes.

A two stroke diesel engine is incapable of natural aspiration as defined above. Some method of charging the cylinders with scavenging air must be integrated into the engine design. This is usually achieved with a positive displacement blower driven by the crankshaft. The blower does not act as a supercharger in this application, as it is sized to produce a volume of air flow that is in direct proportion to engine displacement and speed. A mechanically-scavenged two-stroke diesel engine is considered to be naturally aspirated.
wikipedia.org


so do you guys consider nitrous a fuel?....

Fuel:
Fuel is any material that can be used to generate energy to produce mechanical work in a controlled manner. The processes used to convert fuel into energy include chemical reactions, such as combustion, and nuclear reactions, such as nuclear fission or nuclear fusion. Fuels are also used in the cells of organisms in a process known as metabolism. Hydrocarbons are by far the most common source of fuel in current use, but many other substances can be used as well.

i think nitrous fits that description..

so are you still N/A if you use nitrous? id say yea

but dont go getting confused and star saying your ALL MOTOR

 

I produce 4lbs of boost and alot of positive manifold pressure at around 8800rpms on my na motor, i do have spray on top of it.

 

really? I've used nitrous on all my all motor builds and probably know a fair more about it then the majority in the forced induction itself.. with that said.. nobody cares about your rant...get lost.

 

I vote for a nitrous section or people to quit bitching about a nitrous build when posted in the n/a section. it really doesn't fit in with turbo or s/c builds that are low comp that you see in the fi section.

 

Agreed on the Nitrous section.

To clarify a point - NOS is an oxidizer. When spraying, additonal FUEL is added to offset the oxidizer in a predetermined ratio.

The Nitrous is what promotes combustion of the additional fuel, hence the horsepower gain.

In the world I reside in, NOS is considered a power adder. It can be used on N/A and boosted engines. When used on a N/A motor, it's still N/A, but no longer qualifies as "All Motor" because of the power adder. It's still not a boosted or supercharged engine.

But, why argue???

 

so once you add a internal mod to an n/a motor that now makes it not "all motor"? i think your confused...so adding cams to an engine makes it not "all motor"??...thats a power adder correct? imo nitrous is a type of forced induction...i mean you are "forcing" a gas which mixes with air...the only difference between a turbo/supercharger boost and nitrous boost is one is a gas, and one is air...either way, a amount of something besides gasoline is being injected into the intake so thats why i think it should be considered "forced induction"

 

Think I'm confused huh? I'm ok with that bro. Thanks for the insight.

 

nitrous is considered a power adder.....no matter what it is on.

I agree a nitrous motor is still n/a but with a power adder.

 

Yep - now to educate others. Not sure if I have the patience - but, let's see where the thread goes.

Either way, a NOS forum would probably be a good idea.

 

well for a start u do seem alil confused bc it isnt NOS...its nitrous oxide
so yes i do agree its not forced induction but it is a hell of a lot closer to it than n/a

 

i vote nitro haves its own place... when i come into the all motor section i expect to read about all motor cars that dont use nitrous or turbo hence bein all motor

 

Nitrous wouldn't make an N/A engine into an F/I car anymore than it would make an F/I car into an N/A engine. However No2 does make an "All Motor" engine into just an N/A engine. All motor would mean that only components of the engine itself are used to create power. So no it is not an "All Motor" engine if Nitrous is used and I agree that it should have its own section, but until that happens F/I section is not the place for N/A with nitrous so that leaves them to come here as the closest option.

Now for the real head scratcher... No one in here drives an "All Motor" car unless they have a fully electric car (not a hybrid, FULLY ELECTRIC) since a MOTOR is powered by electricity, what this should be is the "All Engine" section since an ENGINE is powered by fuel. So unless you are discussing a fully electric car I think you need to put your post in the F/I section since that is closer to your application....


(See how ridiculous things get when you get butt-hurt over technicalities?)

 

how do i subscribe ......i would would like to read up n study while im sober

 

in the world i reside in ricers like you call nitrous "nos" which actually stand for nitrous oxide systems which is a brand that makes nitrous kits. don't be a homo get your **** straight before you make a comment in a useless thread.

 

LMFAO! You beat me to it

Use to get yelled at in school for callin a engine a motor

 

The easy solution is separate NAWZ and all throttle no bottle sections