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forced induction nitrous oxide

forced induction nitrous oxide

forced induction nitrous oxide

Tech Overview

Nitrous Oxide systems is the third alternative way of forced induction. In simple terms Oxygen combined with nitrogen (to help dampen it) is injected into the inlet manifold at high pressure to give additional air the engine otherwise would not swallow. This additional air has to be accurately metered with additional fuel at the right air fuel mixture so to create the burn & in turn create the extra power.

Nitrous Oxide in small power increases of say 20 to 80hp on suitable capacity engines can be very reliable & great fun. Nitrous Oxide in large power increases 80hp to 200+hp on small motorcycle engines can be very violent & very hurtful on the engine when things go wrong. It becomes a far more specialized operation when injecting large amount of forced fed gas into small motorcycle engines. The costs of which over a protracted period can exceed that of other forms of forced induction. Nitrous systems to buy into as a performance enhancing beginner is the cheapest route non the less.

There are two principal types of nitrous oxide system that people refer to, they are…

  • Wet kit. This is where the nitrous oxide system includes all the fuel pump, filters & T off squirt fuel & mix into the nitrous flow in the inlet so that you get a metered amount of fuel to go with the metered amount of nitrous oxide.
  • Dry Kit. This is where the nitrous system utilizes the motorcycles fuel injection system’s injectors for a specified fuel enrichment at the point of the nitrous being fired into the engine. More complicated electronically but less complicated in the material parts install as there is no additional fuel parts (unless a race system).

Both of these options have their pros & cons that we are happy to discuss over the phone. On modern fuel injected engines the preference for road & racing applications has been to use dry systems. They offer better fuel accuracy & better safety from ignitable fuel vapour splash back in the air boxes of modern machines.

The air fuel ratio setting of nitrous oxide systems is determined by many factors & you need to get them right or engine failure can result. Things that can affect the air fuel ratio are as follows…..

  • The size of the fuel jet & the size of the nitrous jet
  • The pressure of the fuel system
  • The pressure of the nitrous system
  • The timing of the delivery of the fuel & air in the engine

To enable the adjust-ability of all the above can involve nitrous bottle heaters, fuel pressure regulators & engine managements etc etc. Also progressive nitrous controllers play their part in allowing wheel traction & engine safety from hard power hits.


Big CC Racing offer you fixed price quotations on your project (subject to certain conditions). We have the experience of multiple types of installs & applications. Don't make it a guessing game Big CC know how to engineer the performance you are seeking.

Big CC Racing are world leaders in creating horsepower for motorcycle engine applications. We have 29+ years in the tuning industry & have broken multiple records in power applications & trackside performances.

From simple remapping to 900+hp custom Hayabusa build’s, we can cater for your needs in both road and motorsport applications for bike and bike engine car. We have specific workshops, engine building rooms, fabrication workshop, engineering room & independent Motorcycle & Car dynonometers to offer all services in house.

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