Decided to go Nitrous

[crazy1323]

I decided to pull the plug. I got a Nitrous express kit with two 10lb bottles. I am set up for a 35 shot right now. The highest i will go would be a 50 shot. Don't worry. It is a wet kit so the cars computer will never know the difference. The nozzle is mounted behind the MAF. WOW, the car pulls so hard. It is hooked up to a window switch and a WOT switch with an arming switch also. When you turn it on you can feel i so much. It is like havign someone kick your car in the ass. I LIKE MY NEW MOD

[vmwerks]

Vids? Also photos of the install... how much?

[Gilb3rt0]

Your running a 35 wet shot and its hitting hard? Thats weird I had a 75 wet shot in mine 2 years ago and I barely felt a difference. Well anyway have fun.

[DarXide]

hmmmmm nitrous....yummy..

I would like to do it but I dont wanna **** the engine up...

Post some vids.. :thumbsup:

[DA-MOTORSPORT]

N20: hmmm just get yourself a set of pistons and rings

you will have engine damage soon

a month ago, my friend's Corvette C5 had back fire, and serious engine damage.

good luck

[Dougs325]

But DA, couldn't he run the nitrous through his intercooler once he buys your guys' new turbo kit :bow: :bow: :bow: :bow: :bow: :smokin: :smokin: :smokin:

[crazy1323]

DA: i bet your friend was running around a 150 dry shot on an LS1 V8. I am running about a fifth of what your friend ran. It is also a wet shot so no problems with burnt pistons. The set cost me 500 and I installed it myself. I have a shop in town with race gas and nitrous for about 3 dollars a pound. Also, ZEX nitrous is about 5 miles away. Their HQ is in memphis.

[Mike Benvo]

Not a good idea to run NOS on these cars, but hey, whatever floats your boat.

And the cars computer does know.

[xxcosmicxx]

Not a good idea to run NOS on these cars, but hey, whatever floats your boat.

And the cars computer does know.


Yep...Better not plan on taking it in for any warranty engine stuff...

[samir@technik]

I would recommend checking the AFR on a dyno...you could be going lean everytime you squeeze and not know it.

[russ330]

^If you have the time, could you explain how it can cause the engine to run lean? Thanks. :bow:

[samir@technik]

Squeezing NOS has the same effect as a turbocharger. When boost comes "online", you can temporarily have a leanspot, since an unprogrammed ECU does not understand why there is a sudden surge of airflow. The way fueling works is the ECU receives a signal from the mass air flow sensor, which tells it the volume of air currently being inducted into the engine. It then looks up that value in a table and compares it to the amount of load/RPM the engine is currently putting out. The resulting value is then spit out as a number in "ms", which tells the injector to stay open a certain amount of time (pulsewidth) to properly burn the fill according to a preset air fuel ratio (usually 14.7 under part throttle and 12.6 under WOT for N/A).

For naturally aspirated or supercharged cars this is easy enough to program because you know with 100% certainty that at X RPM, you will have Y airflow, but for turbochargers or NOS it's a little different since you have to deal with another variable known as the "onset of boost"...ie. that brief period between no-boost and boost, which is unpredictable. It's here the engine can run lean because the amount of fuel being injected into the cylinder was metered for a less airflow.

[xxcosmicxx]

Very interesting...Thanks for the info...

[Mike Benvo]

Thanks for the info Samir.

Running lean is a big no no.

[russ330]

Thanks a ton for the explanation Samir. :thumbsup: You should write a book one of these days. :D

[MPossible]

so s/c = more safe than turbo?

[Mike Benvo]

so s/c = more safe than turbo?
Correct. But that's because it's very difficult to tune turbos properly, and very easy to tune superchargers (since the amount of boost is determined by pulley size and RPM, rather than exhaust gases).

[crazy1323]

samir, do you know the exact fuel pressure for a M54B30 motor. I have only used it once because it is not tuned yet. Once i have the exact fuel pressure i can put the exact right jet in and then take it to get dynoed. Once i see the result of the dyno i will consider putting in the 50 shot. I had to use it once to see the result of 500 dollars.

[vaio76109]

Not a good idea to run NOS on these cars

Squeezing NOS has the same effect as a turbocharger.
Ive got to say it, NOS is a brand.

[samir@technik]

Ive got to say it, NOS is a brand.

So what?

The word "NOS" is commonly accepted to mean "NO2". Just like "Kleenex" is used to say "Tissue", or "Xerox" is used to say "Photocopy".

[iLLM3]

Ive got to say it, NOS is a brand.

It also stands for Nitrous Oxide System/s, oh well i know what you mean though :lmao:

[samir@technik]

samir, do you know the exact fuel pressure for a M54B30 motor. I have only used it once because it is not tuned yet. Once i have the exact fuel pressure i can put the exact right jet in and then take it to get dynoed. Once i see the result of the dyno i will consider putting in the 50 shot. I had to use it once to see the result of 500 dollars.

Stock fuel pressure on all late model BMWs = 3.5 bar (~51psi)

///M cars = 5 bar

[vaio76109]

So what?

The word "NOS" is commonly accepted to mean "NO2". Just like "Kleenex" is used to say "Tissue", or "Xerox" is used to say "Photocopy".
Just one of my pet peeves.

[samir@technik]

Just one of my pet peeves.

So do you freak out when someone says, "Pass me a Kleenex" and it happens to be Puffs? :eeps:

[russ330]

^:spit: That's sig worthy right there. :lmao:

[vmwerks]

So do you freak out when someone says, "Pass me a Kleenex" and it happens to be Puffs? :eeps:

I had a restaurant in SF years ago and it would flip me out when someone would ask, "What kind of cokes do you have?"

BTW Puffs are better than Kleenex so personally I would be happy to get Puffs...

NOS = New Old Stock (weird I know)

[vaio76109]

So do you freak out when someone says, "Pass me a Kleenex" and it happens to be Puffs? :eeps:
No, I just use my finger :shhh:

[crazy1323]

Thanks for the help Samir. I will jet the kit exactly right this afternoon

[GJPizzo]

Hi, Sorry if this is a stupid question, but I've never really gotten into the whole NOS thing. I know if done carefully and properly it can be a great gain in HP. However most of my knowledge on NOS has been from reading. I know how it works and that its an oxidizing agent as well as a cooling agent. However what i cant find info on is the difference between a wet shot and a dry shot can someone please explain this to me. Also I know some people spray NOS into their intercooler where as some spray derictly after the MAF and before the throttle body. What the difference. advantages and disadvantages.

[afewbimmers]

you dont spray into the intercooler guy you spray on the intercooler just like you dont suck air through the front of an intercooler..... its like a radiator the nitrous or whatever is being "sprayed" onto it cools the air going through the intercooler

[MackN666]

Do you hate it when people say "Band-Aid" instead of antiseptic bandage?

[vmwerks]

A "wet" system uses a 2nd solenoid to inject extra fuel. This prevents the car from running too lean when the nitrous is on. Nitrous only promotes burning and when used in larger amounts will cause the engine to run too lean and will burn nice little holes in the pistons... By injecting extra fuel you can prevent this from happening...

[Dr. Wonder]

Squeezing NOS has the same effect as a turbocharger. When boost comes "online", you can temporarily have a leanspot, since an unprogrammed ECU does not understand why there is a sudden surge of airflow. The way fueling works is the ECU receives a signal from the mass air flow sensor, which tells it the volume of air currently being inducted into the engine. It then looks up that value in a table and compares it to the amount of load/RPM the engine is currently putting out. The resulting value is then spit out as a number in "ms", which tells the injector to stay open a certain amount of time (pulsewidth) to properly burn the fill according to a preset air fuel ratio (usually 14.7 under part throttle and 12.6 under WOT for N/A).

For naturally aspirated or supercharged cars this is easy enough to program because you know with 100% certainty that at X RPM, you will have Y airflow, but for turbochargers or NOS it's a little different since you have to deal with another variable known as the "onset of boost"...ie. that brief period between no-boost and boost, which is unpredictable. It's here the engine can run lean because the amount of fuel being injected into the cylinder was metered for a less airflow.

So much knowledge, I feel smarter already

[aeon]

So what?

The word "NOS" is commonly accepted to mean "NO2". Just like "Kleenex" is used to say "Tissue", or "Xerox" is used to say "Photocopy".


:owned:

[crazy1323]

Hi, Sorry if this is a stupid question, but I've never really gotten into the whole NOS thing. I know if done carefully and properly it can be a great gain in HP. However most of my knowledge on NOS has been from reading. I know how it works and that its an oxidizing agent as well as a cooling agent. However what i cant find info on is the difference between a wet shot and a dry shot can someone please explain this to me. Also I know some people spray NOS into their intercooler where as some spray derictly after the MAF and before the throttle body. What the difference. advantages and disadvantages.

Nitrous Oxide, Like oxygen is not flammable or combustable. However, it supports combustion. When added with fuel it makes a very cold volatile vapor that is injected into the engine. This works to cool the system(why it is sprayed on intercoolers) and add HP by squeezing more "vapor" into the cylinder.