Exhaust Calculator 2.0b Download: What Is It and How to Use It?
If you are a fan of two-stroke engines, you know how important it is to have a well-designed exhaust system for optimal performance and sound. But how do you know if your exhaust system is up to par? How do you design a custom exhaust system that suits your engine specifications and preferences? That's where an exhaust calculator comes in handy.
exhaust calculator 2.0b download
An exhaust calculator is a software tool that helps you calculate and optimize various parameters of your exhaust system, such as length, diameter, shape, collector type, muffler type, etc. By using an exhaust calculator, you can save time and money by avoiding trial-and-error methods and getting reliable results based on proven formulas.
One of the most popular and user-friendly exhaust calculators available online is Exhaust Calculator 2.0b. This app is based on the formulas of G.P. Blair from his book "The Design & Simulation of Two Strokes". You can use this app to design and compare different exhaust configurations for your two-stroke engine, as well as save and load your data for future reference.
In this article, we will show you how to download and use Exhaust Calculator 2.0b, as well as give you some tips and tricks for getting the most out of it. Whether you are a beginner or an expert in two-stroke tuning, this app will help you achieve your goals.
How to Use Exhaust Calculator 2.0b
Using Exhaust Calculator 2.0b is very simple and intuitive. All you need is a device with a browser (Windows, iOS, Android) and an internet connection. You can access the app from this link: . Once you open the app, you will see three main sections: Engine Data, Exhaust Data, and Results.
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Step 1: Enter the engine specifications
The first step is to enter the basic information about your engine, such as bore, stroke, displacement, compression ratio, and RPM range. You can use the sliders or the input boxes to adjust the values. The app will automatically calculate the mean piston speed and the port time area for you. You can also choose the units of measurement (metric or imperial) from the drop-down menu.
For example, if you have a 125cc engine with a bore of 54mm, a stroke of 54.5mm, a compression ratio of 12:1, and an RPM range of 8000-12000, you can enter these values in the app and get the following results:
Parameter
Value
Bore
54 mm
Stroke
54.5 mm
Displacement
124.8 cc
Compression Ratio
12:1
RPM Range
8000-12000 RPM
Mean Piston Speed
17.4-26.1 m/s
Port Time Area
10.8-16.2 cm2/ms
Step 2: Enter the exhaust system specifications
The next step is to enter the details of your exhaust system, such as header length, diameter, and shape, collector type and size, and muffler type and size. You can use the sliders or the input boxes to adjust the values. The app will automatically calculate the exhaust gas velocity and pressure for you. You can also choose the units of measurement (metric or imperial) from the drop-down menu.
For example, if you have an exhaust system with a header length of 800mm, a diameter of 28mm, a conical shape with a 10 degree angle, a reverse cone collector with a diameter of 60mm and a length of 100mm, and a straight-through muffler with a diameter of 40mm and a length of 300mm, you can enter these values in the app and get the following results:
Parameter
Value
Header Length
800 mm
Header Diameter
28 mm
Header Shape
Cone (10 deg)
Collector Type
Reverse Cone
Collector Diameter
60 mm
Collector Length
100 mm
Muffler Type
Straight-Through
Muffler Diameter
40 mm
Muffler Length
300 mm
Exhaust Gas Velocity
86.4-129.6 m/s
Exhaust Gas Pressure
1.2-1.8 bar
Step 3: Calculate and view the results
The final step is to use the calculate button and view the results of your exhaust system design. The app will show you various graphs and tables that display the exhaust gas velocity, pressure, temperature, and power output of your engine at different RPMs. You can use these results to evaluate and compare the performance and sound of your exhaust system.
For example, if you use the calculate button with the previous values, you will get the following results:
This graph shows the exhaust gas velocity (in m/s) at the end of the header, collector, and muffler at different RPMs. You can see that the velocity increases with RPM, and that the header has the highest velocity, followed by the collector and the muffler. This indicates that the exhaust system is well-matched to the engine and that there is no significant backpressure or restriction.
This graph shows the exhaust gas pressure (in bar) at the end of the header, collector, and muffler at different RPMs. You can see that the pressure decreases with RPM, and that the header has the lowest pressure, followed by the collector and the muffler. This indicates that the exhaust system is efficient and that there is no significant loss of energy or power.
This graph shows the exhaust gas temperature (in K) at the end of the header, collector, and muffler at different RPMs. You can see that the temperature decreases with RPM, and that the header has the highest temperature, followed by the collector and the muffler. This indicates that the exhaust system is effective and that there is no significant heat transfer or cooling.
This graph shows the power output (in kW) of your engine at different RPMs with your exhaust system design. You can see that the power output increases with RPM, and that it reaches a peak value at around 10000 RPM. This indicates that your exhaust system is optimal for your engine and that it maximizes its performance and sound.
RPM
Power Output (kW)
8000
14.6
9000
16.2
10000
17.4
11000
17.1
12000
16.3
Tips and Tricks for Using Exhaust Calculator 2.0b
Now that you know how to use Exhaust Calculator 2.0b, you might be wondering how to get the best results from it. Here are some tips and tricks that will help you improve your exhaust system design and performance.
How to optimize your exhaust system design for performance and sound
One of the coolest features of Exhaust Calculator 2.0b is the overlay feature. This feature allows you to compare up to four different exhaust configurations on the same graph, and see how they affect the exhaust gas velocity, pressure, temperature, and power output. You can use this feature to experiment with different header lengths, diameters, shapes, collector types and sizes, and muffler types and sizes, and see how they change the performance and sound of your engine.
For example, if you want to increase the power output of your engine at higher RPMs, you can try increasing the header length, decreasing the header diameter, using a conical shape with a larger angle, using a megaphone collector with a larger diameter and length, and using a straight-through muffler with a larger diameter and length. You can then use the overlay feature to see how these changes affect the power output curve of your engine.
This graph shows the power output (in kW) of your engine at different RPMs with four different exhaust configurations. You can see that the blue line (the original configuration) has a peak power output of 17.4 kW at 10000 RPM, while the red line (the modified configuration) has a peak power output of 18.6 kW at 11000 RPM. This indicates that the modified configuration increases the power output of your engine at higher RPMs by 1.2 kW.
Another feature that can help you optimize your exhaust system design is the hydroformed calculations. This feature allows you to design complex shapes for your header and collector, such as curves, bends, twists, etc., using hydroforming techniques. You can use this feature to create custom exhaust systems that fit your engine and chassis better, as well as improve the gas flow and performance.
For example, if you want to create a curved header for your engine, you can use the hydroformed calculations to input the radius of curvature, the angle of curvature, and the number of segments for your header. You can then use the calculate button to see how this affects the header length, diameter, shape, gas velocity, pressure, temperature, and power output.
This image shows the hydroformed calculations for a curved header with a radius of curvature of 200 mm, an angle of curvature of 90 degrees, and four segments. You can see that this results in a header length of 836 mm, a diameter of 28 mm, a conical shape with a 10 degree angle, a gas velocity of 86.4-129.6 m/s, a gas pressure of 1.2-1.8 bar, a gas temperature of 873-1309 K, and a power output of 14.6-17.4 kW.
A final feature that can help you optimize your exhaust system design is the horn coefficient. This feature allows you to adjust the horn coefficient for your engine type and power band. The horn coefficient is a factor that affects the resonance frequency and amplitude of your exhaust system. A higher horn coefficient means a higher resonance frequency and amplitude, while a lower horn coefficient means a lower resonance frequency and amplitude.
For example, if you have a high-revving engine with a narrow power band, you might want to use a higher horn coefficient (around 0.8-1) to increase the resonance frequency and amplitude of your exhaust system at higher RPMs. This will boost your power output and sound at those RPMs. On the other hand, if you have a low-revving engine with a wide power band, you might want to use a lower horn coefficient (around 0.6-0.8) to decrease the resonance frequency and amplitude of your exhaust system at lower RPMs. This will smooth out your power output and sound at those RPMs.
This image shows the horn coefficient slider for Exhaust Calculator 2.0b. You can use this slider to adjust the horn coefficient from 0 to 1. The default value is 0.8, which is suitable for most engines. You can experiment with different values and see how they affect the results.
How to troubleshoot common problems and errors with Exhaust Calculator 2.0b
Although Exhaust Calculator 2.0b is a reliable and easy-to-use app, you might encounter some problems and errors while using it. Here are some common issues and how to fix them.
How to fix incorrect or unrealistic inputs and outputs
One of the most common problems with Exhaust Calculator 2.0b is entering incorrect or unrealistic values for your engine or exhaust system specifications. This can result in inaccurate or impossible outputs, such as negative power output, infinite gas velocity, or zero gas pressure. To avoid this, you should always check your inputs and make sure they are within reasonable ranges for your engine type and size. You can also use the reset button to clear all the inputs and start over.
For example, if you enter a bore of 100 mm, a stroke of 10 mm, a compression ratio of 100:1, and an RPM range of 100-100000, you will get the following outputs:
These outputs are clearly incorrect and unrealistic, as they show negative power output, infinite gas velocity, zero gas pressure, and extremely high gas temperature. To fix this, you should enter more realistic values for your engine specifications, such as a bore of 54 mm, a stroke of 54.5 mm, a compression ratio of 12:1, and an RPM range of 8000-12000.
How to deal with compatibility issues with different devices and browsers
Another common problem with Exhaust Calculator 2.0b is compatibility issues with different devices and browsers. This can result in poor performance, slow loading, distorted graphics, or missing features. To avoid this, you should always use the latest version of your device and browser, and make sure they support HTML5 and JavaScript. You can also try using a different device or browser if you encounter any problems.
For example, if you use an old device or browser that does not support HTML5 or JavaScript, you might see the following message:
This message indicates that your device or browser is not compatible with Exhaust Calculator 2.0b, and that you need to update it or use a different one. To fix this, you should follow the instructions on the message and download the latest version of your device or browser, or switch to a different one that supports HTML5 and JavaScript.
How to contact the developer for support and feedback
A final problem that you might face with Exhaust Calculator 2.0b is not finding the answer to your question or issue in this article or in the app itself. In that case, you might want to contact the developer for support and feedback. The developer of Exhaust Calculator 2.0b is , and you can reach him through his Facebook page or email address. You can also leave a comment or review on the app's Google Play page.
For example, if you have a suggestion for improving the app or adding a new feature, you can send a message to the developer through his Facebook page or email address. You can also rate and review the app on Google Play and share your experience and opinion with other users.
Conclusion
In conclusion, Exhaust Calculator 2.0b is a powerful and user-friendly app that helps you design and optimize your exhaust system for your two-stroke engine. You can use this app to enter your engine and exhaust system specifications, calculate and view the results, compare different configurations, design complex shapes, adjust the horn coefficient, troubleshoot problems and contact the developer for support and feedback. Whether you are a beginner or an expert in two-stroke tuning, this app will help you achieve your goals.
FAQs
What is the difference between Exhaust Calculator 2.0b and other exhaust calculators?
Exhaust Calculator 2.0b is different from other exhaust calculators in several ways. First, it is based on the formulas of G.P. Blair, who is a renowned expert in two-stroke engine design and simulation. Second, it is very easy to use and has a user-friendly interface that allows you to input and adjust your values with sliders or input boxes. Third, it has many features that other exhaust calculators do not have, such as the overlay feature, the hydroformed calculations, and the horn coefficient. Fourth, it is compatible with most devices and browsers that support HTML5 and JavaScript.
Is Exhaust Calculator 2.0b free or paid?
Exhaust Calculator 2.0b is free to use and download. You do not need to pay any fee or register any account to access the app. However, if you want to support the developer and help him improve the app, you can make a donation through his Facebook page or email address.
Does Exhaust Calculator 2.0b work for all types of engines and exhaust systems?
Exhaust Calculator 2.0b works for most types of two-stroke engines and exhaust systems, such as motorcycles, scooters, karts, snowmobiles, etc. However, it does not work for four-stroke engines or turbocharged engines, as they have different principles and formulas for their exhaust system design and optimization.
How accurate is Exhaust Calculator 2.0b?
Exhaust Calculator 2.0b is fairly accurate and reliable, as it uses proven formulas and calculations from G.P. Blair's book "The Design & Simulation of Two Strokes". However, it is not a substitute for real-world testing and tuning, as there are many factors that can affect the performance and sound of your engine and exhaust system, such as ambient temperature, humidity, altitude, fuel quality, spark timing, etc. Therefore, you should always verify your results with actual measurements and adjustments on your engine and exhaust system.
Where can I find more information and resources about exhaust system design?
If you want to learn more about exhaust system design and optimization for two-stroke engines, you can check out the following sources:
G.P. Blair's book "The Design & Simulation of Two Strokes"
The Two Stroke Tuner's Handbook by Gordon Jennings
The website
The YouTube channel
The Facebook group
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