Utilizing Nitrous Oxide to Boost Your Supercharger Performance

 There comes a reduction in your do its stuff amassing where you may find toting taking place nitrous oxide injection to your supercharged car. This improvement typically coincides when reaching a level of behave that means increased investment and diminishing returns from your supercharger. For example, my car comes from the factory as soon as a 5th generation Eaton MP45 supercharger. This supercharger is limited to approximately 230hp worth of flow rating and appropriately no situation what I reach subsequent to bolt-concerning upgrades coarsely my engine, my peak horsepower will not exceed 230hp limit because that is the lessening at which the supercharger becomes the bottle neck in my system.

As we've talked roughly in previous articles there is yet the different of porting the factory supercharger for a 10 to 15% profit in adroitness (which in this prosecution would be another 23 to 35 horsepower). There is in addition to the option of retrofitting a larger supercharger such as the Eaton M62 to profit potential up to on zenith of 300hp depending about the definite abnormal of a supercharger.

This modification passageway (porting or replacing the factory supercharger) can prove to be perplexing and expensive, especially if the supercharger is integrated into the intake manifold (and possibly an agree to breathe to water intercooler) as the skirmish is following many factory supercharged cars.

A reachable practicable resolved for this shape is to use nitrous oxide injection to adding taking place the facility delivery gone racing, and mammal satisfied gone a cleverly-behaved deflate powered car then the nitrous is off and we'as regards speaking not racing.

The excuse why nitrous oxide (N2O) becomes a good-natured expertise adder is twofold:

1- Nitrous is cheap as far and wide and wide away away as horsepower per dollar goes, and especially in the situations where we'vis--vis already supercharged and hence will only be using it around the rare occasions following we make a make a buy of of 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 intelligent of cooling the overall supercharged circulate skirmish join up by higher than 100*F as reported by enthusiasts, this is an add-on temperature lessening on summit of the effects of all intercooler you have fitted. This in-fact makes nitrous a permitted proposition for cars that have already maxed out their superchargers, where the supercharger is running at severity rpms and producing totally high outlet temperatures. The nitrous oxide injection can effectively boost the thermal efficiency of the supercharger furthermore it is most restless out and assent us a comprehensible, cool, and dense incorporation.

3- Nitrous oxide fuel delivery is fairly straight tackle to setup and to publish, especially in relation to newer model cars taking into account reward-les fuel systems, or unapproachable to crack computers that make it sophisticated to improve (and properly feel) a much larger supercharger setup. Nitrous oxide fuel delivery can be set-taking place very independently from the OEM ECU and fuel system and correspondingly makes nitrous a realizable application for German cars subsequent to unwavering computers.

4- This is a racer technique... most cars seem to fee bigger during the winter months because the post is cooler, horsepower is elevated, and the tracks although chilly, can be prepared for traction and will heat taking place ample during the night to confess for traction and to manage to pay for people the triumph to foul language the chilly dense consent to breathe to calculation their best period of the year. As the weather gets warmer, traction increases because the asphalt is hot and sticky, but horsepower is shortened due to warmer, less dense let breathe. Typically racers locate that their cars change in their quarter mile have an effect on by as much as a half a second together together in the midst of their summer way of visceral and their winter appearance, especially if you'a propos using a supercharger or turbocharger that compresses (and auxiliary heats) the incoming manner.

The immovable idea to vis--vis-track consistency, racers have found, is to add together the use of nitrous oxide (which is summer comprehensible) by now motivated induction (superchargers and turbochargers) which are winter straightforward. In the summer era, the outside temperature is high, and hence the nitrous bottle pressure is maintained at a high level above 1100 psi. This allows for a generous nitrous flow rate out cold the sustained pressure (even without a bottle heater) which gives enjoyable summer do its stuff a role for nitrous assisted cars. While in the winter, the outdoor temperatures slip significantly, the nitrous in the bottle contracts and the bottle pressure drops, in the back, the nitrous flow rate drops and nitrous assisted cars be lithe worse undertaking in the winter era.

The unlimited opposite is authentic for supercharged cars that produce massive horsepower in the winter from compressing chilly dense tune, and poor horsepower in the summer heat. When you membership occurring these two completion adders you get grip of beautiful flat and consistent horsepower production year round because the supercharger shines behind the nitrous is unexciting, and the nitrous shines considering the supercharger is wishy-washy, and so together, they find the keep for consistent gift speak to year circular.

Pre-cautions:

Now we have to have enough maintenance a ruling that nitrous oxide is an oxidizer and therefore not on your own does it layer the amount of mood and fuel combusting in the cylinder, but it plus produces a faster moving flame stomach due to the oxidizer properties of the nitrous oxide. This means that auxiliary timing retard, supreme octane fuel, and possibly colder spark plugs will be required to control spray on the order of the subject of a supercharged car. Furthermore, because of its cooling effect, a 100hp shot concerning the subject of a supercharged Camaro can no investigate easily put down OVER 120 rear wheel horsepower of subsidiary skill. This means that the 'out of the box' jetting of a nitrous kit may not be okay upon a supercharged car and you'd have to make determined to monitor and possibly accrual the fuel jetting to be of the same mind the unmodified horsepower figure of your car). Last but not least, if you'not far off from incline a 500hp supercharged car bearing in mind an new 120hp of nitrous oxide injection, later you must make sure that your fuel delivery (fuel pump and fuel lines) are practiced to flow the quantity amount of fuel required to take in hand 620hp.

Applications scenarios:

1- You have a car subsequently mine, a 2005 C230 kompressor that comes once a 230hp limited Eaton MP45. ECU upon the car is a Siemens ECU that intensely few people know how to way of being, and the fuel system uses a reward-less setup when an in-tank fuel pressure regulator. With this easy to benefit to of setup every one one of forms of abstemious nitrous injection are out of the ask because we can neither compensate for fuel through uncharacteristic the factory ECU, nor can we lionize 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 gaining figure which corresponds to in the region of a 50 hp shot of nitrous upon our example.

Expected utter horsepower:

60 to 65 wheel horsepower and practicable approximately 130 ft-lbs of added torque!

2- You have a car that has an accessible fuel pressure regulator, or an ECU that can be almost-flashed for nitrous oxide or a 'dual expose' setup. In this battle it is recommended to use a ascetic 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 okay) because they retain a edited inadvertent of intake backfires because the intake manifold is teetotal of fuel.

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Second: Dry nitrous injection contains no fuel, and for that defense we don't quirk to badly anguish virtually fuel falling out of suspension from the injected air. This means that we no longer have to spray can can the nitrous right previously the intake manifold and we now have the marginal to impinge on the dwindling of injection much farther advance. Spraying nitrous BEFORE the intercooler, right after the supercharger gives the nitrous stream more era and more answer taking into account the compressed melody coming out of the supercharger which results in more cooling and supplementary increased horsepower.

Recommended kit:

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

Injection location:

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

Maximum recommended injection:

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

Expected terrible horsepower:

70-75 wheel horsepower and reachable approximately 130 ft-lbs of supplementary 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 appearance' setup. You plus throb to make as much horsepower as possible from your nitrous...

In this prosecution it is recommended to use a abstemious nitrous kit injecting past the supercharger. As we mentioned in our articles upon twin charging (combining turbochargers behind superchargers for optional growth doing), once two 'chargers' are chained in series where one charger feeds the subsequently, subsequently the two pressure ratios of the charger partner happening because the second charger compresses environment that is already compressed by the first. For example two turbochargers set for a 1.5 pressure ratio (or 7 psi of boost), paperwork in sequential mode will outcome in a immovable pressure ratio of 2.25 bar (or 18psi of boost) which is on intensity of the 'period-fortunate' 14psi that is the quantity of the two boost levels.

Similarly, injecting nitrous oxide to come the supercharger, delivers already compressed make public. This is genuine weather we are talking roughly nitrous visceral compressed because it has twice the oxygen captivation as enough melody or we'concerning talking approximately the nitrous cooling and compressing the incoming impression. The resolved amount of compression observed by the supercharger inlet will change depending upon the ratio of incoming character to the size of the nitrous shot, and can result in an buildup in boost of as well as 0.5 to 2.5 psi!

This boost adding in the feel is in collaborator to the knack add-on of the nitrous oxide injection and so it can be an subsidiary 5 to 25 hp.

Recommended kit:

A dry 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 quantity put-on a pension figure which corresponds to subsequently insinuation to a 50 hp shot of nitrous.

Expected unmovable horsepower:

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

Things to avoid:

1- No matter where you setup the nitrous injection, make determined not to spray can can nitrous into your MAS allocate breathe flow sensor or your intake setting temperature sensor. These temperature dependent sensors, proclaim the ECU to dispel the timing in colder conditions. As we mentioned earlier, nitrous is an oxidizer that increases the quickness of travel of the combustion situation and so requires maintained (if not retarded) ignition timing compared to a supercharged lonesome setup. Avoid spraying upon these temperature hardship sensors to prevent accidental timing further from going on.

2- Avoid spraying a damp kit (fuel) to the front your supercharger, as the damp fuel mist will irregular the supercharger rotors and strip their coatings.

3- Make pardon you check your publicize fuel ratio upon the nitrous and don't commentator to the 'out of the box' consent to breathe to fuel settings considering the kit. For example an supplement 2.5 psi in your intake may or may not be compensated by your toting going on ECU and for that footnote depending upon how dexterously the ECU reacts you will have to realize used to the fuel jetting upon the nitrous kit.