Is nitrous considered forced induction? - Honda Prelude Forum

PreludeChick89 · 05-28-2004, 08:02 AM

A few people have told me in the past they consider it so but my boyfriend says no.... we made a bet... explanations would be great.... and please vote so we get to see who wins the bet

The Oreo · 05-28-2004, 08:06 AM

oh NOOO!!

i saw your name as the last person who posted in the nitrous thread.. and thought to myself.. hmmmm... what is she up to.. i guess it's time to see who is right and wrong.

achemze · 05-28-2004, 09:27 AM

My answer is No. BOOST is positive manifold pressure. Implying you are Forcing air into the intake. As Nitrious is a compressed gas, its not being "forced", its being sucked by the vacuum into the intake. To the best of my knowledge, (ive never been in a NOS car) you dont create positive manifold pressure with nitrious. IE: a boost guage would never pass much more than 1psi.

But im a turbo head ... so i could be completely out in left field here.

NXLude · 05-30-2004, 01:09 AM

No, nitrous isnt compressed per se once it exits the nozzle. It makes power because its a more pure form of oxygen....So its not really forced into the motor....

Glowmunkey · 05-30-2004, 10:01 AM

All right, here's my take on it... you wouldn't consider your nitrous powered car NA, right? Because nitrous is an oxidizer, adding more oxygen to the fuel, not burning on its own. So in essence you are "forcing" more air into the combustion chambers.

But yeah, you're not creating any positive pressure in the manifold, you're just injecting extra oxygen, to be drawn in by manifld vac (as stated above)...

So my answer is a definitive maybe, depends upon how you wish to look at it.

laughin2.2 · 05-30-2004, 12:59 PM

Forced induction? No
Power adder per every sanctioning body that I can think of? Yes

achemze · 05-30-2004, 01:57 PM

Well, like i said. The true definition of "boost" is Postive Manifold Pressure. So unless you're creating "boost" on a vacuum gauge, you're not "boosting". I would consider n2o NA. Its not a "stock" class NA setup, but its NA non the less. The car isnt seeing "boost", so its not FI.

NXLude · 05-30-2004, 06:17 PM

Nitrous is a class of its own.....you can have nitrous NA or boost.....its pure uncut power.....

Vapor · 05-31-2004, 08:43 PM

Quote:

Originally posted by laughin2.2
Forced induction? No
Power adder per every sanctioning body that I can think of? Yes

exactly correct.

you're not forcing anything into the manifold, therefore it is NOT "forced induction"

It's a power adder. you're no longer considered naturally aspirated, as the gas you're providing isn't natural atmosphere.

but no positive manifold pressure = not FI.

You've lost the bet.

Ludeykrus · 06-01-2004, 03:27 PM

I would say yes, it is forced induction.

Take a look at the words:

"Forced"....well, that' pretty obvious. Spraying a pressurized chemical is just as much "forced" as spinning a pinwheel :P

"Induction"....an engine runs by combusting oxygen and fuel, not air and fuel. If you force more OXYGEN into the motor than it can naturally breath on its own, then you are forcing induction upon the motor.

axion68 · 06-01-2004, 04:18 PM

I voted for no. Reason being is that you are running on more oxygenated air than regular atmospher air. It is kinda like running a car at 10,000 feet elevation and then going down to sea level and knocking half a second off of your 1/4 mile ET. Nitrous behaves more so like an N/A motor than a FI motor.

achemze · 06-02-2004, 10:05 AM

The n2o isnt transfering pressure to the intake. So the tube isnt under any further pressure than it is without n2o.

I do think N2O is its own catergory. Because you all forget that you can use n2o both NA and boosted. So you could be either or technically.

Vapor · 06-08-2004, 07:50 AM

Quote:

Originally posted by Ludeykrus
I would say yes, it is forced induction.

Take a look at the words:

"Forced"....well, that' pretty obvious. Spraying a pressurized chemical is just as much "forced" as spinning a pinwheel :P

"Induction"....an engine runs by combusting oxygen and fuel, not air and fuel. If you force more OXYGEN into the motor than it can naturally breath on its own, then you are forcing induction upon the motor.

its not pressureized as soon as it leaves the nozzle. the pressure equalizes to its surrounding in milliseconds.

and you're not providing a way to cram oxygen down the motors throat.

everything about nitrous' injection into the intake stream operates based on atmospheric pressure. The bottle is pressureized more for mass storage reasons than anything else.

you're not forcing ANYTHING. its not forced induction. its not N/A either, as there's nothing natural about it. you can't run nitrous N/A, as by running nitrous you're removing yourself from being N/A.

Pyrex · 06-25-2004, 05:45 PM

I vote no. Nitrous is an chemical oxidizer that is not flameable until in large amounts of heat are added, example in combustion chamber during the compression stroke breaking it down into nitrogen and oxygen which are both diatomic, meaning they will want to be n2 and o2. These are the basic ingredents of the air we breathe(21% oxygen 78% nitrogen). The nitrous breaks down into roughly 66% oxygen and 33% nitrogen based on quality and purity. More oxygen present therefore, more fuel can be burned safely and efficiently.

Forced Induction is when supercharger or turbocharger forces more air into the combustion chamber than the vacuum can suck in. This provides greather than atmospheric pressure. 7psi gauge equals 21 psi atm.

Power in how much fuel you can burn. To burn fuel you need more air, to be specific, Ideally you need 14.7 parts air, 1 part fuel. FI provides more air to be able to burn more fuel, while nitrous increases the oxygen content per unit volume also alowing more fuel to be burned. Nitrous is not forced induction.