Safe way to spray NOS

[WhatADream]

So I have been contemplating if this would actually be a safe way to spray NOS into the engine?
just spray it right into the intake box...
that way the car just thinks its getting super cold air, and can adjust the A/F ratios accordingly...
I used to have a turbo car and sprayed it right onto my intercooler which cooled down the air dramatically... although not as effective as a wet shot, it gave me safe horsepower~

[Justincredible]

Great Idea, but you'll destroy the MAF. Also the intake track doesn't like to have anything in it other then Air. Even some people who spray W/I have issues from time to time.

You can get a Nasty back fire

[Beelzeebub]

maybe there's a way to mod the intake manifold???

[Bon-Of-A-Sitch]

i wish some German audi engineer would chime in and tell us how to do this shit.

[gearsnshafts]

i wish some German audi engineer would chime in and tell us how to do this shit.

Why does he/she have to be German?

[sakimano]

[BigJS4]

So I have been contemplating if this would actually be a safe way to spray NOS into the engine?
just spray it right into the intake box...
that way the car just thinks its getting super cold air, and can adjust the A/F ratios accordingly...
I used to have a turbo car and sprayed it right onto my intercooler which cooled down the air dramatically... although not as effective as a wet shot, it gave me safe horsepower~

Please don't take my first comment as an insult, it is just a correction...

NOS = Nitrous Oxide Systems a Division of Holley.

When speaking about Nitrous Injection, N2O works well....

Next... When you had a Turbo system, and sprayed N2O onto the Intercooler, you were not utilizing Nitrous Injection. You were however just spraying it (CO2 or Water can work too) onto the intercooler to help in the cooling of the air travelling through it. Water helps cool the fins via evaporation, while the CO2 or N2O is basically freezing the fact of the IC creating better heat transfer.

This would help increase power slightly as the air entering the engine is cooler. That is all... No additional oxygen is being added to the mix as in Nitrous injection.

Since I don't feel like typing a whole story, I'll keep it simple.

Dry Injection is where pure Nitrous ONLY is injected into the intake (intake pipe, manifold, etc). Increases in fuel will be made through pressurizing a vacuum controlled FPR (fuel pressure regulator), Increasing fuel line pressure, or adjusting injector pulse width. Sometimes a combination of methods would occur.

Wet Injection is where N2O and Fuel are injected into the intake (intakle pipe, manifold, etc) together. The Nozzle will include a atomizing jet to make sure the fuel and N2O mix well when injected into the engine. You can do a single shot, or direct inject (1 nozzle per cylinder, usually plumbed into the IM runner).

Typically N2O is injected into the Intake Pipe (don't use a rubber hose, solid materials are preferred), after the MAF and other sensors. Direct Injection is a great way to Run N2O, but you will need a custom set of rails, or drill the IM, or a N2O injection plate, etc to do so.

The safest ways to run N2O would include as many safeties as possible...

Using a system that includes a fuel pressure safety switch, Wide Band O2, RPM activated switch, and even a smart ignition system with Knock sensor and ignition retard capability.

Basically...

Fuel Pressure Safety Switch: If fuel pressure falls below a certain psi, it will cut the N2O system entirely, closing the solenoids.

Wide Band O2: With a Switch attached would cut the N2O system when the A/F mixture becomes too lean

RPM Activated Switch: Controls at what RPM the N2O begins spraying and at what RPM it cuts off. This protects you from hitting any fuel or ignition cuts built into the ECU at red line. This Switch would work along with the master arm and WOT (wide open throttle) activator switch. Basically you arm the system, and hit WOT for it to spray, and now only between certain RPM's.

Knock Sensors: There are upgrades to Ignition systems,. or the ability to retune a factory system. Basically if knock is detected, it will pull timing quickly. Detonation will kill a motor...even in the slightest bit (depending on the motor of course)

Many people just bolt a N2O kit to a car and go. You can do this and be fine, but you really should tune for it.

Using specific spark plugs... colder than stock (to prevent sparks from glowing), with a narrower gap (to prevent spark blow out)... is a requirement too.

Pulling timing, or atkleast running higher octane (possibly race fuel) is key also.

There are many basics to running N2O, and many different schools of thought when running it. No matter what, when you run N2O there are safer ways, and less safe ways to do things.

That's about all I feel like typing for now... I hope it helps.

Also, this is not the end all be all of N2O use, and I am in no way a professional.

[BigJS4]

Holy crap did I type a long post... Sorry for that... didn't realize my ramblings went on that long.

[beemercer]

Holy crap did I type a long post... Sorry for that... didn't realize my ramblings went on that long.

Great post though, very informative for anyone without a background in N2O .

[BigJS4]

^thanks...

[CHECKERED]

Great Idea, but you'll destroy the MAF.

if that was true there wouldn’t be such a thing as a dry kit

[BigJS4]

You spray after the MAF... wet or dry....

Spraying before the MAF can damage the sensors.

[jfunkey]

yup,

Spraying NOS in the air box is a no no.

This is a good long read. The kit JHM is making (clip at then end of the thread) is going to be the best thing you can do. Plate or direct port is MUCH better and safer. Spraying Anything into a multi stage intake manifold has only proven to cause NOS back fire issues. You can even get a fuel back fire from MI/WI meth and water injection if not carefull.

http://www.audizine.com/forum/showthread.php?t=243285 good read

Even dry shots will cause an issue in the intake manifold. You can't use a dry shot too easy on our cars and expect to tap into the fuel pressure for the added fuel. REmember this is a returnless fuel system, so best to spray a fogger or NOS and GAS. But then again you raise your chances of getting a intake manifold NOS backfire. And spent fuel in the intake is a disaster waiting to happen.

In the end a good NOS system is going to make the difference between broken parts and broken records. With NOS systems the cheaper up front the more expencive it is on the back side.

Looks to be something good from JHM. I would wait

[Bon-Of-A-Sitch]

Why does he/she have to be German?

Because it's MY wish. You can go wish something else.

[buck_dat]

Bon-of-a-Sitch, I just love it when you post. Just like looking at your Avatar!!

[Bon-Of-A-Sitch]

Bon-of-a-Sitch, I just love it when you post. Just like looking at your Avatar!!

thanks buddy