As I said before, the idea here is to “feed” the bmw engine huge amount of cold air. The most common way to do that is to use a compressor, however, this can also be achieved by injecting the engine with gas which cools off the air vent and allows for air to enter the fuel chamber.

Nitro (also called NOS, which is the name of one of the nitro manufacturing companies) is liquid when compressed. Normally, nitro is a gas. It’s can be injected into the engine in two ways:

Dry Injection:
The injection system is installed right after the air filter
-          Wet Injection

The nitro is injected right into the fuel chamber and mixed with the fuel. It’s delivered through the car’s default injection system.

The nitro bottle, for safety reasons, is always installed into the trunk. A pipe system connects it to the engine. There is also an electronic valve installed (often even 2, again for safety reasons) which is operated by the driver or by a device, linked to the RPM window switch. The idea behind that is that the nitro is used only at high RMP, otherwise it’ll be too much of a shock for the engine. Every driver’s mistake is “punished” with a really loud bang, damaged pistons and gearbox, broken rear axel, etc. Nitro isn’t easy to use, especially if you are using it regularly.

So, how does one know how much nitro to inject into the engine?

Well, most of the injectors are designed for an exact amount of HP- 50, 75, 100, 200, 500, 1000, etc. These numbers only apply for a specific nitro bottle pressure. That’s why the best and most expensive nitro systems have an electric “blanket” which heats the bottle and helps keep pressure the same.  However, this heating system won’t help you if your nitro bottle is empty or nearly empty!
Normally, the more powerfull systems ( 200HP+ ) are designed in at least 2 tears. The first tier is a computer which activates the first half of the nitro system’s power, in our case 100HP. After a  little while, usually, 0.5-2 seconds, it also activates the second half. This is done for the sole reason of not losing traction. Imagine what would happen if your car’s engine gets a 200HP injection in a millisecond.

Another thing to look out for when driving a nitro equipped vehicle is the pressure. It must always remain constant and never reach the low end of the meter. That’s why the whole system gets “blown” before use. Each nitro system has small nozzles which are used to vent off some excess gas. I think you’ve you seen drag vehicles leaking gas just minutes before the race, right?

Another interesting use for the nitro is as a supplemental system for a bmw tuning.
by Alexandre Prévot under CC-SA It’s not directly used to gain even more power, on the contrary. Here, nitro is used as a coolant. However, the effect is so big that a 50HP injection might even give you 75-80 HP, a 100HP one 160HP, etc. Nitro here is also used to “kick” the engine at low RPM and help it reach high RPM quickly. It’s sometimes also injected into the intercooler- that way it cools off the entire turbo system.

So, nitro is really nice, cheap and easy to install right? Nope…

The majority of unmodded engines can’t handle a lot of nitro. Modern day cars are expected to handle maximum 75HP. Well, vehicles like the American muscle cars with massive engines can handle up to 200HP, however, they are an exception which only confirms the rule. All turbo/compressor/nitro systems are installed for extra power, which leads to extra load on the engine. In order to handle this and not break, the engine needs to be designed specifically for that or to be customized at least a bit.

How could this be done?

Well, installing new pistons might do the job. Changing the compression ratio to a lower value is also useful, 8:1 is the standard for turbo charged engines. As I said before, let’s ignore the fuel and imagine that the engine needs only air to work. However, it’s important to make sure that the engine gets enough fuel. Sometimes this might require a full reprogramming of its computer, but if the fuel pump is too weak for the increased fuel consumption, you will need to change it and the injectors too. The worst thing that might happen to you while injecting your car’s engine with nitro is to not get enough fuel- there will be a lot of fiel detonations and the engine is sure to require a full pistons change!

Incoming bmw tuning search terms:

• BMW NOS
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• nitro tuning 2012

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