turbo machines are useful software applications to help you choose the right turbocharger for your generation. good computer to have additional functions that maximize the potential of the turbo setup also improves the characteristics of the coil and the maintenance of the monitoring processes to help your boost pressure.
Intro turbo
Exhaust System
Turbocharger compressors, which are typically connected to a motor to improve performance. The compressor of the turbochargertrapping the air in the ventilation system of the engine and compressed before it enters the cylinder. This compression increases the air density and engine more oxygen molecules (which are essential for burning) are taking the same volume of the cylinder, ergo making the engine breathe like a larger displacement engine, and finally allowing them to produce more energy.
The turbine itself is what drives the compressor wheel as described above. L 'Captures the gas turbine exhaust from the engine, and uses the energy stored in these hot gas thermodynamics and move quickly moving to the turbine wheel. The turbine wheel is physically connected to the compressor wheel and taking off as the turbo starts to spool - this is the point at which the compressor reaches a high speed, where he started quite capable of compressing the air to the side of suction motor slip forward as described above.
Right size Turboat the request of the motor
Now there are many possible combinations of different sizes of compressors and turbines, turbochargers, creating a series of works on any vehicle. For example, a large displacement engine that has a lens with high power require a larger turbine that does not stifle the flow of exhaust, but a small turbo that do not need much work to compress the air for a goal power of small size. Alternatively, a small-displacement engine with a highPower objective, such as requiring a four-cylinder drag racing side of the turbine is a smaller one for a faster spool, but with a compressor side, plus a very high power density target in a very high compression ratio to provide.
What good is a turbo-machine, you choose the right turbocharger both the intake and exhaust side of the engine for the best balance between speed and reel to achieve our goals to give equivalent total power.
In general, largerthe turbine and compressor wheels are larger than large and heavy ... and require more time and energy to spool up. At the same time, larger and larger compressor wheel turbine capable of supporting the objectives of higher power without stalling the engine or the restriction of flow. This is the inherent trade-off between coil and excellence that is the nature of the game-turbo sizing.
Factors, demand for motor
Knowing that the two turbo-driven by the engine exhaust stream, and alsoknowing that the turbo is in the final analysis, a peak power greater than our air motor (feed to increase our strength and power levels) ... then the heart of any good turbo-machine is a model of good engine that understands how much energy and flow of the engine is already choosing a turbocharger appropriate.
These are various factors that affect engine requires that the fans most of the benefits is more likely that their perception on their car before or while doing a turboConvert or install a turbo kit.
For example:
* The increase in engine displacement has increased in general, the performance of the engine between 2% and 15% used depending on the type of over-bore or stroker kit.
* Increase the speed at which the engine on its peak power level of power by the ratio of these two RPM ... min, for example, with an aftermarket camshaft for the peak power of the engine at 7500 rpm to produce a 6500 rpm against the stockCamshaft must increase power by about 15% depending on the exact amount.
* Further changes as a new intake manifold and exhaust, bigger and better designed exhaust manifold for the turbo system capable of lifting the engine's volumetric efficiency and peak flow from anywhere between 5 and 15%
The combination of all these factors together, it is possible that the engine with which you try to turbo already produces up to 50% more (and is therefore more than 50%Claims arising from the proposed turbo) as a motor, the stock is done to play to its original settings.
Calculate your ideal pressure ratio
Now that we demand and our new levels of engine power (conducted after the examination of the changes we have as already mentioned) to know that we can then use for selecting a turbocharger, which is exactly this combination of engine corresponding .
engine under normal breathing the only effect of air pressure environment because ofweather conditions on Earth. These conditions vary with things like altitude and humidity, but generally more engines to collect money due to a pressure difference of 1 (or 1 atmosphere) between the outside air and the vacuum inside the cylinder to breathe.
If our current engine produces 450 hp at 1 atmosphere in naturally aspirated form, and we want to make 750 hp turbo then the logic is this:
Necessarily flow to the engine 750Hp instead of 450 bhp, the turbo requires a state to determine which of the revenue of the car variety than the normal atmospheric pressure of 1 bar operating system. The exact size in an ideal world is indeed necessary, the relationship between these two levels, the bar is 1.66 (or 1.66 atmospheres) of pressure, since the air flow and air pressure linearly related .
With this knowledge, we now know that for a turbo, looking for a value of 750 hp air(About 1,125 cubic feet per minute) with a pressure ratio of 1.66.
This figure of 1125 cfm@1.66 PR is the key to the selection of a compressor fitting that a volume of air that flows to that level of pressure is at a sufficiently high yield.
The ratio of actual density vs pressure ratio ideal
As mentioned above, under ideal conditions, a pressure ratio of 1.66 is enough to get our performance. But in the real world, it increases the air temperature when air is compressed. ThisIncrease in temperature causes the air to expand, as we tested, the pack will reduce its density.
The combination of thermal expansion is a loss in efficiency of the compressor. The ideal compressor has a density of 2.0 at a pressure of 2.0, ie when the compressed air at twice the pressure, it is now half the size and twice the density ... But in the real world, the relationship between the density is always behind the pressure ratio depends on the thermal efficiency ofCompressor where it is possible that our target pressure ratio of 1.66, which makes our current density ratio that is 1.5, which are the real power at this level that we should push 675 hp instead of the target of 750.
With a good inter-cooler, after the turbocharger, the efficiency of bringing the entire system almost 85% and 90%. But this means that in most cases that most computers have become known Turbo, about 10 to 15% are to your target audience and performance thatNeed a Power Boost bit 'closer to your goal destination. Unless the turbo-machine knows the exact point on the map where you can have peak power compressor, and if it is for the compressor efficiency at this point as the yield inter-cooler (the two factors, the difference between correct the relationship between actual density and pressure ratio ideal)
How is the turbo-machine will give you a short list of potential projects to meet yourPower and boost pressure goals for your engine needs is a good habit, a bit oversized turbocharger, where your data point (1125 cfm@1.66 PR) in the middle of the compressor sits on an island map to choose high efficiency positioned on the right side of the map of a turbocharger compressor is smaller than almost reached the limit for this combination of the engine. After a bit 'large turbocharger can compensate the slight difference between the actual densityRatio and pressure ratio calculated that most computers can not fix, and this may slightly increase the pressure of the larger turbo is to ensure that you can still reach your target market power of the gate. The smaller turbocharger that your goal has data point of the margin of the compressor map is ultimately a lower efficiency of the compressor to the larger outer islands, and there is more room to grow with you to any future changes or have a powerincreased.
Aspect ratio turbine sizing
Now that we have found that our compressor motor is required matches, we need to choose the right aspect ratio turbine on the best features of our turbo spool. On most road the engine pressure ratio of 2.0 you will notice that the builders have already adjusted the size of the turbocharger turbine wheel coupled to the game overall good performance of the compressor wheel to give.
Butwith that already taken care of by the manufacturer, the customer is still with a choice of aspect ratio turbine minutes after helping to target a particular coil U / a trade-off of peak flow.
The turbine is the aspect ratio of the diameter of the suction pipe to the radius of the turbine impeller. To simplify the explanation, think of a fan mounted on the pen with a long straw. The fastest way to get the fan to spin up is usually on the outer fan lobes, all by shockYour breathe air like a thick outside edge. This "die" as the air injection fan helps, but ultimately, limited mouth design in a nozzle, the maximum amount of air that is generated in a position to blow the fan against the back pressure in your moth.
Alternatively, open your mouth and blowing up a larger area of the fan takes longer for the fan at top speed to reach, but in the end you get a chance to blow a large amount of air through the fan without bodyPressure in the mouth.
The proportions of the turbine is the ratio between the input range of the diameter of the turbo turbine wheel, and is selected with a single turbine and the establishment of this diameter, change the size of the turbine inlet housing changes in the size of ' air injection "spear" in the air turbine engine, the exhaust ports.
A smaller image size has a small entrance area of the nozzle to improve the effectiveness and gives faster spool. An aspect ratio higherhas a larger entrance area, which distributes the air over a larger area of the turbine wheel, does not endorse the coil, but ultimately helps the breathing of the engine easier in terms of peak flow, without a lot of pressure in exhaust manifold.
In general, the aspect ratio turbine (A / R) is selected based on:
* Displacement: the greater the displacement, which can produce more power at lower rpm levels, not "die" in need of support from the turbineHousing, the higher the aspect ratio can.
* Redline motor and the speed of roll end, the higher the red line of the engine, the broader the range of speed, we need to do to force, which is less urgency, which at 2500 rpm Turbo (if you're up to 10,000 rpm power spool with) the more likely we are to choose a wider aspect ratio.
* The ratio of maximum pressure, the higher the pressure ratio, for which the wider the dynamic range of performance that can be seen from the recoveryEngine between being on the rise and on impulse, the greater the current request is to be on the turbine generally smaller (what about the smaller engine combined with any type of reel to the first place) and so the more aspect ratio to be chosen (although on a smaller radius typically turbine for these cases).
A good turbo-machine is able to consider these factors and suggest a different aspect ratio will be at least a good compromise between coil U / (theRpm, where the first turbo starts producing energy) and the peak flow capacity of the turbine (which can reduce up to 25% - a significant amount - for a 0.40 A / R 1.20 A case against a / R housing for example).
Waste-Gate-sizing
The wastegate is an outlet that is controlled by boost pressure. Once the pressure in the intake manifold achieved our desired compression ratio is the waste-gate terminal to open direct discharge from the turbine and directly inthe exhaust system. This prevents bypass more energy reaches the turbine and the turbine wheel controls rpm.
The general concept behind the sizing of the waste gate is twofold:
may waive the greater the energy from the turbine and wastegate as the most accurate are your boost control - 1. Small gates of the waste stream at higher levels are overwhelmed and show side effects such as "boost creep" at high speeds.
2 - The door of the waste must be a percentage of total costsThe exhaust flow rate of air for your use of the turbocharger. For example, a turbocharger, which is fully at 2500 rpm coils on an engine that a 7500 rpm redline is rpm, you need to bypass two-thirds of the exhaust gases from the turbine, since only one third of Engine power is sufficient for the turbo spool.
In addition, the larger turbocharger your goals, your power is in comparison (1000hp with a turbo on a 600hp engine capable of, for example), the greater the magnitude of the waste isTo get away from the turbine exhaust energy prevents the turbo to go at maximum speed and lift too much and produce too much power (which deal with the engine may not be ready or fuel).
In both cases, there is a minimum size of waste-gate terminal, the location of a reasonably balanced turbocharger to treat your engine needs. How to oversize the turbocharger more and bigger (space for future upgrades and more power) and at least your number of turns and a coilTurbine A / R lower and lower, then you must be a port with even bigger waste gate to compensate for the right to manage the charging levels.
Turbo Calculator Explained
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