NOS question...

[trez2k3]

So im talking to a friend and we get on the subject of cars and he says that NOS will make the RPM's in your engine go to 40k briefly....... Im like what? wouldn't that destroy your transmission?? I don't know maybe I'm wrong but that just doesn't dound right.

 

[Zim Hosein]

:beer:

 

[Ladies Man]

right... and i'm jesus

your engine would kill itself immediately

 

[zCypher]

hahahaha

 

[theNEOone]

your friend is an idiot

 

[zCypher]

that's almost as good as someone i know saying he has nos in his accord, and that the cruise control button activates it.

he "showed" us once, and ... wow, nothing happened. :Q the acceleration of his 91 accord at 90kmh was just insane.. oh yeah.. haha

 

[m2kewl]

i don't know who's the bigger fool - your friend saying that, or you believing him

 

[Ryan]

Alright, you two have watched TOO much Fast and Furious crap.

 

[kevinthenerd]

Originally posted by: trez2k3
So im talking to a friend and we get on the subject of cars and he says that NOS will make the RPM's in your engine go to 40k briefly....... Im like what? wouldn't that destroy your transmission?? I don't know maybe I'm wrong but that just doesn't dound right.

utter bullsh!t, plain and simple...

...unless you're in neutral with a custom chip, fully-balanced engine, and an extra engine in your garage to replace the one you just broke.

(there's another broken car thread tonight... shifting from 5th to 2nd. See those pictures? That'll be your car. I estimate those RPM's to be at least on the order of 25000 rpm.)

 

[GoingUp]

Originally posted by: Zim Hosein
:beer:

 

[bleeb]

All I know is that N.O. (Nitrous Oxide?) is injected into the combustion chambers and is basically more volitile than regular fuel. And so the controlled explosion is greater, forcing the pistons out faster. That is how you achieve the greater horse power.

I might be wrong. Anyone want to correct or add?

 

[bigshot]

i know a guy who had NOS in his integra...got pulled over and got a $5000 fine for having it installed. I guess you have the bottle installed in the car but the hose or pipe (dont no not familar with NOS) cant be connected to the engine. He cant even get insurance right now. btw this is ontario and its a new law to condone street racing.

 

[boyRacer]

hahahahahaha... 40k... hahhahahahahaha

 

[kevinthenerd]

Originally posted by: rbloedow
Alright, you two have watched TOO much Fast and Furious crap.

F&tF isn't to blame here. It's the belief that F&F is real.

I have many beefs with the original as far as facts go, but they are very entertaining movies, don't get me wrong. (I haven't seen the second yet.)

 

[GoingUp]

Originally posted by: kevinthenerd

Originally posted by: trez2k3
So im talking to a friend and we get on the subject of cars and he says that NOS will make the RPM's in your engine go to 40k briefly....... Im like what? wouldn't that destroy your transmission?? I don't know maybe I'm wrong but that just doesn't dound right.

utter bullsh!t, plain and simple...

...unless you're in neutral with a custom chip, fully-balanced engine, and an extra engine in your garage to replace the one you just broke.

(there's another broken car thread tonight... shifting from 5th to 2nd. See those pictures? That'll be your car. I estimate those RPM's to be at least on the order of 25000 rpm.)

link? I cant find the thread...

 

[boyRacer]

Originally posted by: bigshot
i know a guy who had NOS in his integra...got pulled over and got a $5000 fine for having it installed. I guess you have the bottle installed in the car but the hose or pipe (dont no not familar with NOS) cant be connected to the engine. He cant even get insurance right now. btw this is ontario and its a new law to condone street racing.

not really new... probably seems new since that damn movie popularized the use of NOS... but that law has been around for awhile now.

 

[kevinthenerd]

Originally posted by: bleeb
All I know is that N.O. (Nitrous Oxide?) is injected into the combustion chambers and is basically more volitile than regular fuel. And so the controlled explosion is greater, forcing the pistons out faster. That is how you achieve the greater horse power.

I might be wrong. Anyone want to correct or add?

<nods>

Basically, it oxidizes the existing combustion, but let's use the KISS method for practicality.

 

[no0b]

Text

 

[Pacfanweb]

Originally posted by: kevinthenerd

Originally posted by: trez2k3
So im talking to a friend and we get on the subject of cars and he says that NOS will make the RPM's in your engine go to 40k briefly....... Im like what? wouldn't that destroy your transmission?? I don't know maybe I'm wrong but that just doesn't dound right.

utter bullsh!t, plain and simple...

...unless you're in neutral with a custom chip, fully-balanced engine, and an extra engine in your garage to replace the one you just broke.

(there's another broken car thread tonight... shifting from 5th to 2nd. See those pictures? That'll be your car. I estimate those RPM's to be at least on the order of 25000 rpm.)

Not even close. No car can take 25000 or 40000 rpms, not even for a second. Shifting from 5th to 2nd wouldn't cause that big a jump, anyway.
BTW, your friend is an idiot, like someone else said. N2O will make your rpm's jump because the engine suddenly has more power and will therefore turn up faster. That's the only reason.

 

[kevinthenerd]

Originally posted by: Gobadgrs
link? I cant find the thread...

http://forums.anandtech.com/messageview.cfm?catid=38&threadid=1066949&FTVAR_MSGDBTABLE=

http://forums.2gnt.com/dcboard.php?az=show_topic&forum=13&topic_id=40306&mesg_id=40306

 

[Regs]

40 thousand RPMs? That number is off the face of this earth. A drunk man could make up something that has more sense then that. Even with engine mods up to the wazzue, going passed 10k will make almost any engine blow.

 

Your friend is dumb, and probably young.

 

[Crappopotamus]

Originally posted by: bleeb
All I know is that N.O. (Nitrous Oxide?) is injected into the combustion chambers and is basically more volitile than regular fuel. And so the controlled explosion is greater, forcing the pistons out faster. That is how you achieve the greater horse power.

I might be wrong. Anyone want to correct or add?

no, nos isnt explosive. it reacts in the heat, giving the reaction more oxygen as a result. and it cools as well i believe. but yeah, you get a more powerful combustion reaction as a result =more hp

Originally posted by: bigshot
i know a guy who had NOS in his integra...got pulled over and got a $5000 fine for having it installed. I guess you have the bottle installed in the car but the hose or pipe (dont no not familar with NOS) cant be connected to the engine. He cant even get insurance right now. btw this is ontario and its a new law to condone street racing.

heard about that. a lot of riced out guys are getting pulled over... kinda dumb imo. bleh.

 

[kevinthenerd]

Originally posted by: Pacfanweb
Not even close. No car can take 25000 or 40000 rpms, not even for a second.

I was off, but let's do the math. It didn't take it for that second... that's the point. The motor fell into pieces.

RSX-S gear ratios (taken from http://www.acura.com/models/model_specs_index.asp?module=rsx )

1st: 3.267
2nd: 2.130
3rd: 1.517
4th: 1.147
5th: 0.921
6th: 0.738
Reverse: 3.583
Final Drive: 4.389


Ok... red line is 8000 rpm (source: http://www.epinions.com/content_69181935236 )

so, from 5th to 2nd would be a ratio of 2.130 / 0.921 = 2.3127

2.3127 * 8000 = 18501.6

So I was off, but 18500 is still fast as hell, and the motor is still shot because of it.

 

[Demon-Xanth]

Basically what N2O does is add extra oxygen to the air going in, nitrous systems also add fuel to go with that air otherwise the engine would run incredibly lean. RPM limations aren't as much based on the fuel as much as mechanical durability. The valve train can only go so fast until the valves can't keep up with the lobes. The pistons can only be accellerated so fast until the rods, bearings, or the pistons themselves can't take it. Pumps can only be spun so fast and then they will cavitate. Crankshafts can only be used to put so much force on a connecting rod and then they too can break. The fastest piston engine in an automative application is rumored to be the Ferarri formula one engine that is rumored to be able to hit 20,000RPM. Correct me if I'm wrong, but even the ultimate drag racing power plant, the 8000HP top fuel engines, only spin about 7500RPM. The only engines that I know of that hit 40k are turbine and electric.

Summary:
Nitrous and RPM are not related.