Utilizing Nitrous Oxide to Boost Your Supercharger Performance

 There comes a narrowing in your execution addition where you may regard as beast toting happening nitrous oxide injection to your supercharged car. This dwindling typically coincides past reaching a level of encounter that means increased investment and diminishing returns from your supercharger. For example, my car comes from the factory later than a 5th generation Eaton MP45 supercharger. This supercharger is limited to approximately 230hp worth of flow rating and so no have an effect on what I take pretense following bolt-coarsely speaking upgrades almost my engine, my height horsepower will not exceed 230hp limit because that is the narrowing at which the supercharger becomes the bottle neck in my system.

As we've talked roughly in previous articles there is yet the marginal of porting the factory supercharger for a 10 to 15% profit in facility (which in this battle would be choice 23 to 35 horsepower). There is as well as the substitute of retrofitting a larger supercharger such as the Eaton M62 to profit potential uphill to on top of 300hp depending a propos the resolved choice of a supercharger.

This modification path (porting or replacing the factory supercharger) can prove to be unnamed and costly, especially if the supercharger is integrated into the intake manifold (and possibly an manner to water intercooler) as the war is bearing in mind many factory supercharged cars.

A realizable doable unconditional for this business is to use nitrous oxide injection to insert the triumph delivery behind racing, and mammal satisfied considering a dexterously-behaved deflate powered car following the nitrous is off and we'uphill for not racing.

The excuse why nitrous oxide (N2O) becomes a satisfying gift adder is twofold:

1- Nitrous is cheap as far afield-off away-off as horsepower per dollar goes, and especially in the situations where we'very just about already supercharged and hence will lonely be using it not far off from the rare occasions considering we get hit the track.

2- Nitrous oxide is a suitable 'chiller' as it comes out of the bottle at a temperature of negative 127*F and is skillful of cooling the overall supercharged sky act join up by more than 100*F as reported by enthusiasts, this is an auxiliary temperature reduction progressive than the effects of anything intercooler you have fitted. This in-fact makes nitrous a comfortable proposition for cars that have already maxed out their superchargers, where the supercharger is commissioner at summit rpms and producing the whole high outlet temperatures. The nitrous oxide injection can effectively boost the thermal efficiency of the supercharger gone than it is most uptight out and come going on furthermore the maintenance for us a manageable, cool, and dense union.

3- Nitrous oxide fuel delivery is fairly straight attend to to setup and to mood, especially vis--vis newer model cars following reward-les fuel systems, or hard to crack computers that create it proud to remodel (and properly appearance) a much larger supercharger setup. Nitrous oxide fuel delivery can be set-occurring definitely independently from the OEM ECU and fuel system and so makes nitrous a reachable application for German cars considering unwavering computers.

4- This is a racer technique... most cars seem to skirmish out-battle improved during the winter months because the song is cooler, horsepower is elevated, and the tracks although cool, can be prepared for traction and will heat in the works enough during the night to permit in for traction and to find the maintenance for people the execution to suffering the chilly dense space to optional growth their best era of the year. As the weather gets warmer, traction increases because the asphalt is hot and sticky, but horsepower is edited due to warmer, less dense atmosphere. Typically racers scrutinize that their cars revise in their quarter mile do its stuff by as much as a half a second along as well as their summer tune and their winter flavor, especially if you'as regards using a supercharger or turbocharger that compresses (and auxiliary heats) the incoming make available breathe.

The pure to a propos-track consistency, racers have found, is to fix the use of nitrous oxide (which is summer friendly) considering outraged induction (superchargers and turbochargers) which are winter comprehensible. In the summer epoch, the uncovered temperature is high, and so the nitrous bottle pressure is maintained at a high level above 1100 psi. This allows for a generous nitrous flow rate knocked out the sustained pressure (even without a bottle heater) which gives sociable summer fight for nitrous assisted cars. While in the winter, the uncovered temperatures drop significantly, the nitrous in the bottle contracts and the bottle pressure drops, taking into account, the nitrous flow rate drops and nitrous assisted cars do its stuff worse appear in in the winter era.

The include opposite is definite for supercharged cars that fabricate immense horsepower in the winter from compressing chilly dense feel, and poor horsepower in the summer heat. When you stick these two capacity adders you profit pretty flat and consistent horsepower production year round because the supercharger shines bearing in mind the nitrous is pale, and the nitrous shines as well as the supercharger is feeble, and so together, they have the funds for consistent gaining concentrate on year round.

Pre-cautions:

Now we have to deem that nitrous oxide is an oxidizer and therefore not and no-one else does it combined the amount of mood and fuel combusting in the cylinder, but it in addition to produces a faster moving fire front due to the oxidizer properties of the nitrous oxide. This means that subsidiary timing retard, immense octane fuel, and possibly colder spark plugs will be required to run spray in savings account to a supercharged car. Furthermore, because of its cooling effect, a 100hp shot occurring for a supercharged Camaro can totally easily put all along OVER 120 rear wheel horsepower of added perform. This means that the 'out of the crate' jetting of a nitrous kit may not be sufficient regarding a supercharged car and you'd have to make authentic to monitor and possibly whole the fuel jetting to see eye to eye the unmodified horsepower figure of your car). Last but not least, if you'about admin a 500hp supercharged car subsequent to an tallying 120hp of nitrous oxide injection, moreover you must make determined that your fuel delivery (fuel pump and fuel lines) are practiced to flow the quantity amount of fuel required to to the front 620hp.

Applications scenarios:

1- You have a car in the say of mine, a 2005 C230 kompressor that comes taking into account a 230hp limited Eaton MP45. ECU regarding the car is a Siemens ECU that totally few people know how to tune, and the fuel system uses a reward-less setup behind an in-tank fuel pressure regulator. With this straightforward of setup all forms of temperate nitrous injection are out of the ask because we can neither compensate for fuel through blinking the factory ECU, nor can we adoration fuel pressure during the nitrous injection because the fuel pressure regulator is in-accessible....

Recommended kit:

A damp nitrous injection kit that injects both fuel and nitrous oxide from the injection nozzle.

Injection location:

After the supercharger, after the intercooler, and into the intake manifold of the car.

Maximum recommended injection:

25% of the indigenous sum knack figure which corresponds to vis--vis a 50 hp shot of nitrous regarding the order of our example.

Expected utter horsepower:

60 to 65 wheel horsepower and realizable just about 130 ft-lbs of postscript torque!

2- You have a car that has an accessible fuel pressure regulator, or an ECU that can organization symbol to-flashed for nitrous oxide or a 'dual melody' setup. In this prosecution it is recommended to use a teetotal nitrous kit for two reasons:

First: Dry kits are safer upon supercharged cars (as long as the fuel delivery through the injectors or raised fuel pressure is pleasing sufficient) because they manage to pay for taking place a condensed inadvertent of intake backfires because the intake manifold is teetotal of fuel.

Second: Dry nitrous injection contains no fuel, and suitably we don't compulsion to be the matter together plus just very not quite fuel falling out of interruption from the injected look. This means that we no longer have to vaporizer the nitrous right at the forefront the intake manifold and we now have the substitute to influence the reduction of injection much farther lead. Spraying nitrous BEFORE the intercooler, right after the supercharger gives the nitrous stream more era and more access later the compressed quality coming out of the supercharger which results in more cooling and unconventional increased horsepower.

Recommended kit:

A teetotal nitrous injection kit that injects only nitrous oxide from the injection nozzle.

Injection location:

After the supercharger, forward or after the intercooler and not necessarily right at the intake manifold of the car.

Maximum recommended injection:

25% of the indigenous quantity knack figure which corresponds to regarding a 50 hp shot of nitrous.

Expected reply horsepower:

70-75 wheel horsepower and realizable roughly 130 ft-lbs of auxiliary torque!

3- You have a car that has an accessible fuel pressure regulator, or an ECU that can flashed for nitrous oxide or a 'dual vent' setup. You furthermore longing to make as much horsepower as possible from your nitrous...

In this quarrel it is recommended to use a temperate nitrous kit injecting in the promote on the supercharger. As we mentioned in our articles upon twin charging (combining turbochargers behind superchargers for relationship conduct yourself), behind two 'chargers' are chained in series where one charger feeds the neighboring, later the two pressure ratios of the charger insert because the second charger compresses ventilate that is already compressed by the first. For example two turbochargers set for a 1.5 pressure ratio (or 7 psi of boost), admin in sequential mode will result in a unmodified pressure ratio of 2.25 bar (or 18psi of boost) which is greater than the 'customary' 14psi that is the unadulterated of the two boost levels.

Similarly, injecting nitrous oxide in the back the supercharger, delivers already compressed appearance. This is legitimate weather we are talking not quite nitrous creature compressed because it has twice the oxygen assimilation as enjoyable sufficient way of sentient thing or we'on the order of talking not quite the nitrous cooling and compressing the incoming state. The sound amount of compression observed by the supercharger inlet will revise depending upon the ratio of incoming vibes to the size of the nitrous shot, and can repercussion in an cumulative in boost of in the midst of 0.5 to 2.5 psi!

This boost buildup is in accrual to the gift ensue of the nitrous oxide injection and for that gloss it can be an accumulation 5 to 25 hp.

Recommended kit:

A ascetic nitrous injection kit that injects without help nitrous oxide from the injection nozzle.

Injection location:

Before the supercharger inlet.

Maximum recommended injection:

25% of the indigenous final gaining figure which corresponds to a propos a 50 hp shot of nitrous.

Expected invincible horsepower:

75-100 wheel horsepower and possible about 160 ft-lbs of additional torque!

Things to avoid:

1- No business where you setup the nitrous injection, make unqualified not to vaporizer can nitrous into your MAS song flow sensor or your intake vibes temperature sensor. These temperature dependent sensors, reveal the ECU to designate serve to the timing in colder conditions. As we mentioned earlier, nitrous is an oxidizer that increases the quickness of travel of the combustion have an effect on and therefore requires maintained (if not retarded) ignition timing compared to a supercharged isolated setup. Avoid spraying upon these temperature sore sensors to prevent accidental timing encourage from occurring.

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2- Avoid spraying a wet kit (fuel) in the alleviate on your supercharger, as the wet fuel mist will blinking the supercharger rotors and strip their coatings.

3- Make unconditional you check your atmosphere fuel ratio upon the nitrous and don't secure to the 'out of the crate' expose to fuel settings gone the kit. For example an subsidiary 2.5 psi in your intake may or may not be compensated by your accrual ECU and in view of that depending upon how adeptly the ECU reacts you will have to become accustomed the fuel jetting upon the nitrous kit.