Carl Fausett

Nitreous Oxide (NO) is not corrosive until the Nitrogen molecule is separated from the Oxygen molecule. NO2 is Nitrous di-oxide. We are not talking about that.

The NO (1 nitrogen, 1 oxygen) molecule separates easiy, releasing the Oxygen molecule to be a catalyst to combustion. That is also when it becomes highly corrosive - as do all oxygenating catalysts.

Kibort is sorta right, sorta not. NO is not inherantly flammable, but then neither is pure Oxygen. But, it is such a significant catalyst to combustion as to be treated like a flammable product by the Railroads, Truckers, Bottlers, etc etc. It is labelled and stored like a flammable product.

NO is not liquid Oxygen, but I think Mark Kibort was maybe using that phrase as a metaphor, not a chemistry statement.

I stand by my earlier statements:

It is hard on internal engine componants because it is highly corrosive.

It stinks - literally. Sulfer has been added to industrial nitrous so kids will stop wiffing the stuff. The nitrous oxide in your car is not the same as the medical nitrous your dentist uses.

It is expensive - $30 a refill according to others here. I said $40.

It is inconveninent - 3 pushes of the button (if that) and you're out.

mark kibort

Now, im worried about the NOS ive been adding to my tires? if there is moisture in there, could it form Nitr.acid? that cant be good.

"sorta not right"??
NOS is not flammible, its not like O2, where that can take most any fuel and burn it white hot!! NOS is like, and i did use the metaphore, "liquid air" NOS has simular propotions as air, but missing one Oxygen atom.

I also had my engine that used a bunch of NOS , apart adn there were no ill effects at all. It also doesnt stink. it will make you sick if you inhale it, but it doesnt smell on the dyno and we burned a bunch of it there!! (close quarters, no smell, and burning it like it will be used in the car)

So, your kind of right too!
but more wrong than right.

1. not that expensive ( relative to one tank of race gas) $40 per 10lb bottle and thats 14-15 button pushes of 50hp) (debateable)
2. so, its not that inconvenient. (debateable)
3. doesnt smell (either burned or unburned)
4. is not flamable, and is treated as only an oxidizer by truckers,etc
5. not hard on engine components. (tested and reviewed by many)

Ill give you inconvenient, however, as you do need to get the bottle filled after a race or two. I used to rotate two bottles so i was never out. not a big deal, but it certainly is not as "convenient " as having a supercharger already on the car!

Mk

SharkSkin

Mark, why would you put NOS in your tires? It's heavier than air... unless you're just kidding...

bcdavis

It makes the tires FASTER!

hahahaha!

mark kibort

heavier?? No, im not kidding. its easy to bring 1000psi /10lb bottle of the stuff and it fills tires for an entire season (as well as footballs, basketballs at home)
(if its flamable, ill have to light an old rubber basket ball at 4th of july and see if it explodes!!)

how much air (by weight) do you think a tire has in it at 30psi (thats 2 times atomosphere) Air and NOS are very close in weight per cubic foot, by the way.

as was said, NOS does liquify at a lower pressure than many gasses making it ideal for this kind of application. I cant run air tools out of it, but i can fill lots of tires with 10lbs of NOS!! Most folks run Nitrogen or C02 , and it is slightly cheaper to fill their bottles that are much larger. with NOS being stored in a semi liquid state, i can fit proportionately more in a smaller container.

been doing this for a few years now, and have had no issues. certainly not a weight concern. I worry about steel belts vs fabric belted tires when it comes to weight.

MK

rob rossitto

ahhhh, a gas indeed! sulpher in the NOS? that's what my dentist said, but I thought it was the breakfast burrito... guess he shouldn't be filling his tank at pollo loco...

SharkSkin

Well... probably not a big net difference. I had some concentrated nitrous at the dentist before and it makes my voice sound like Isaac Hayes. Opposite effect of helium.

I hope you realize though, that you have now opened yourself up to all kinds of nonsense... "Something funny about them tires"...

928mac

ROTFLMAO now that is funny

blown 87

My mean old Great Dane hated the Nitrous in my 468 Chevelle, he did like the couple of long walks he got from it though.

Randy V

Rob continues to entertain from the grave.

DR

I never knew exactly why it is hard on engines (thanks) but I have seen it first hand on a few 928s.

One example was a 928er in Atlanta who added NOS to his 87 928S4. He started out with a 75hp kit and just like all of us Power addicts, he kept adding more and more.

Here is a quick rundown of his experience as told in "Dynos" (BTW, same dyno , same operator/driver).

Original Car dyno before adding NOS - approx 270-280 RWHP

Last NOS Dyno after adding a "200hp??" shot - approx 550+ RWHP (have Dyno Chart here some where, will try and dig it up).

Dyno after NOS was removed after a year or less?? - approx 220-230 RWHP.

Things that make you go Hmmmmmm......

Iwanna928

I hoped to have my system on before SITM. Not looking good though. We will see. Closing on a home here on June 1st and the move and new stuff that is needed is mind boggling. Always more money, more money!

I won't be using a 200 shot. A progressive150 will do!

4.5L shortblocks are cheap! I will be building a motor this summer.(hybrid) I quess I will see how it all works out. I think it is a none issue really if it is setup correctly. 928 engine is a great motor.

Not really a lot of places to use it. Mine is wanted to squish those pesky Vette's on the highway! Probably will use it less than 1% of the engines use.

Speaking of which I was playing with one (Vette) on the highway for about 3 to 5 minutes the other day on I75. We were kinda of moving thru traffic. He had a hard time keeping up and finally got a pass. Then in traffic he hit it when there was a opening. Sounded nice when he hit it but he didn't pull that bad on me.

With a progressive system I would spank that dude! Thats what I am looking for on a cheap OB budget performance build up!

DR

FWIW, I will say the most "intense" ride in a 928 I can recall,.. was one with NOS at the Frenzy out on the street in front of Authorority's Shop.

I thought for sure it was gonna break the seat back when he hit the NOS... made me smile for days afterwards thinking about it... Fun stuff!

Iwanna928

Thats what I like to hear DR. How big of a shot was he using? 150, 200?

mark kibort

a supercharger with the same HP adder would do the exact same thing, in fact, as that level of added hp, the NOS would be safer. NOS has a cushioning effect during combstion, when the nitrogen breaks from the oxygen.
plus, it starts out very cold, which fights preignition and detonation.


now, if you are atributing the lack of base engine HP on the NOS, this might be true, only because of the power and heat the engine was seeing. 550rwhp!!!! thats 50 more hp than a built motor by greg brown with all the fancy high performance stuff. im sure , the loss of hp was due to burned valves, or stressed rings, or who knows, he was driving it hard for a year, who knows what could have been going wrong. could be due to anything. probably not the NOS but certainly the extra power!