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rt24596

Nitrous

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Nitrous:

One of the quickest approach to a fast car and a quicker approach to a blown(no reference to turbo's or superchargers here) car if not done right.

Nitrous is just packaged air to send more oxygen into your combustion chambers in a chemically stable form so that it does not explode outside your cylinders. More fuel and more air can help get more horsepower also lead to detonation (which is capable of destroying your engine)

So what does it take to run the right choice of a nitrous system on your vehicle?

Check the key parameters:

Compression Ratio: 8:1 - 10:1 (Have not brought cc into consideration yet and prices are only indicative without import)

Lower the compression ratio more the effects of nitrous are obvious on a stock car

Lower the compression ratio higher the nitrous shot (Shot: A measure of nitrous that is injected into an engine)

Lower compression engines tend to handle dry shots(without additional fuel being injected) much better

Higher the compression the lower the limit of nitrous used theoretically

Fine if that is the base minimum then what kind of nitrous system should I use:

Types of nitrous systems

Single Nozzle - Dry Shot

- Can be suitable to any type of car

- Easier to fix and run

- Just about enough bang for the buck

- Prices typically start at $ 350

- Can handle 35 - 150 shot (rough translation into HP figures too)

- Typically comes with multiple jets

Single Nozzle - Wet Shot

- Can be suitable to any type of car

- Needs additional plumbing for the fuel line

- Fuel Pressure Regulator reccomended

- Prices typically start at $ 450

- Can handle 50 - 150 shot (rough translation into HP figures too)

- Typically comes with multiple jets

- Once in a while race

- Do not try above 50hp on your own on a 1.5 ltr on and definitely not such a high shot on a lower capacity engine

Plate Type - Dry and Wet

- Suitable to carburetted cars

- Needs additional plumbing for the fuel line

- Prices typically start at $ 350

- Can handle 50 - 300 shot (rough translation into HP figures too)

- Typically comes with multiple jets

- Race scenario only recommended

- Needs the hand of a good tuner

Direct Port -Wet Shot

- Suitable to Fuel Injected cars

- Needs additional plumbing for the fuel line

- Fuel Pressure Regulator reccomended

- Prices typically start at $ 400

- Can handle 50 - 300 shot (rough translation into HP figures too)

- Typically comes with multiple jets

Direct Port - Progressive Controllers

- If you race quite often

- Needs a good tuner

- Might need multiple sets of jets based on the controller used

- Costs start to skyrocket

Let me now start with the key points that can help destroy your engine before going further

Factory plugs - trust me they will blow out before you release that nitrous button

RPM Trigger / WOT Trigger: Fire nitrous on a low revving engine on partial throttle and you are sure to blow it to heaven come

Lean fuel mixtures: Nitrous use requires a lot more additional fuel else the knock of death is for sure

Restrictive exhausts: Overheat your valves

Ignition Timing: Needs to be retarted for nitrous use and not advanced

NOS Bottles: would not blow your engine apart but your car instead if you do not use the forged aluminum bottles CO2 bottles are not direct replacements. It makes me jittery when people try to run NOS systems with cast iron bottles and then try to regulate heat by pouring water on it have seen a guy blow to smithereens while filling in helium in a co2 bottle, stay away

What are the mods that will benefit my car for nitrous use

Better intakes and exhaust

Plugs with short ground straps

Race Cams

Porting and Polishing

Fuel pump upgrade

Additional Fuel Pump

Forged parts - Pistons, Con Rods, Crank

Aftermarket ignition controller especially for distributorless cars

or a Good ECU - piggy back or stand alone

A good clutch and drive train to transfer the power

good tyres to grip and not spin out (look who's talking )

A good tuner who knows what he/she is doing

Ok now you know the types of Nitrous systems and the risks out there, BUT how do I jet them???

Please be careful from this point on and I would never reccomend that you do this on your own

Jetting a nitrous system and fuelling is best left to the pro's as it depends on too many factors to list out here

Jetting can never be copied from one car to another as it varies as per the mods / fuel / fuel pressure / ignition system / strength of the engine etc

So go to your tuner and have him do it

Cheers,

rt24596

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