Bmep hp x 6500 l x rpm 2 stroke l engine size in liters. In his design and simulation of two stroke engines, in chapter two entitled gas flow through twostroke engines, he gave the results of tests with pressure waves in pipes that proved the above explanation. We shall send you a pdf document with the templates for manufacturing your exhaust. Any donations greatly appreciated, please use paypal link. A performance exhaust system is a characterizing element for any internal combustion conveyance. Exhaust and intake tuning this article describes the principles involved in using tuned exhaust and intake systems on twocycle and fourcycle engines. We also have a simple 2stroke expansion chamber design program. My name is ed erlenbach, im a private tuner specializing in yamaha rd and tz performance in southern california. So whether you have a 50cc road bike, a 500cc motocrosser or a classic racer, we will design the perfect exhaust system for you. Our goal is to achieve the biggest power gains as possible, while maintaining reliability on your 2stroke engine. Two stroke engine and exhaust design software page 2.
Moreover you can have advices for the development of the engine thanks to the help of tested formulas for intake, exhaust. Improve the performance of your twostroke engine with a torqsoft designed exhaust system. The trend in high performance two strokes has continued towards more case volume, however each engine and application differ. Advanced two stroke tuned exhaust system the challenge the society of automotive engineers clean snowmobile challenge 2002 sae csc 2002 is an engineering design competition for college and university student members of the society of automotive engineers sae. Pagesotherbrandsoftware2 stroke design calculators. Twostroke high performance engine design and tuning. For manufacter and tuner of two stroke engine, ntproject has developed a series of software to help in the development of the engine and its components from the bellmouth of the carburetor, to the insert of the reed valve and the reed petals, at the studied of the cylinder ports, until to the balance of the crankshaft, thanks at our software you could optimize your engine and to develop new. How twostroke expansion chambers work, and why you should. Two stroke engine and exhaust design software post by dawid. With the traditional lubrication technique of mixing oil into the fuel, they also have the advantage of working in any orientation, as there is no oil reservoir dependent on gravity. For the same power developed, a two stroke cycle engine is lighter, less bulky and occupies less floor area. How twostroke expansion chambers work, and why you should care. But because of the limited worldwide activity in twostroke engine development, program sales were limited and further development was curtailed.
Two stroke engine and exhaust design software north. The basic design of the two stroke enginea and the book a. Software for fine tuning and design of two stroke engine. Purchase with immediate download from digital river, shareit. While twostroke engine development is on the rise again, the worldwide. The exhaust designer programme enables the user to design a two stroke exhaust system with ease, then with one click of the mouse, create a pdf document in any of the common paper sizes a4, a3, letter. The old adage of stuffing cases on every project just isnt true any more.
For further investigate of the operation of twostroke engines with tuned exhaust pipes it is most appropriate to analyze actual test data. Two stroke designmodification software the following are spreadsheets for different aspects of 2 stroke designmodification. The stateoftheart is presented in such design areas as unsteady gas dynamics, scavenging, combustion, emissions and silencing. Software for fine tuning and design of two stroke engine by ntproject. The basic design of two stroke engines internet archive. The calculations are assuming a speed of sound in the exhaust gas, which is not known exactly.
Scratch build an engine from a few odds and ends in your home workshop. In motocross its usually a compromise between best peak hp and good early off the pipe power. The intent of the competition is to provide universities with an. Designtune expansion chambers with live view of pressure waves. I use the tsr computer software to calculatepredict the horsepower. Torqsoft twostroke exhaust system designer programme. Two stroke engine expansion chamber design software. This software covers the 3 stage diffuser type expansion chamber exhaust as per equations provided in his book entitled design and simulation of two stroke engines published in 1996. This coefficient kh is called the horn coefficient, with typical values between one and two. Bimotion 2stroke software has been commercially available and in professional use since 1991. It seems to be trying to fix a non problem of two strokes, their pumping losses, two strokes dont have significant pumping losses.
The exhaust system of a car is one of the most commonly modified areas when a. Advanced twostroke tuned exhaust system the challenge the society of automotive engineers clean snowmobile challenge 2002 sae csc 2002 is an engineering design competition for college and university student members of the society of automotive engineers sae. Two stroke petrol engines are preferred when mechanical simplicity, light weight, and high powertoweight ratio are design priorities. Once i have that completed i would understand the geometry that i need and have an envelopescaffold defining the geometry. We shall send you a pdf document with the templates for. I found most other software work on outdated blair and jennings formulas. Two stroke exhaust pattern if i were doing this the first thing i would do is model the entire design as a single solid body no wall thickness, no separate components. As the forces in a two stroke pipe design have become more wellunderstood, designers have been able to create engines that take more advantage of them and in fact require an expansion chamber to run at all. This small java applet uses design rules according to, and, to size a tuned pipe for a 2 stroke piston engine. Twostroke petrol engines are preferred when mechanical simplicity, light weight, and high powertoweight ratio are design priorities. Two stroke engine and exhaust design software post by ede sun jan 17, 2016 5. Two stroke engine and exhaust design software post by dawid sat jan 16, 2016 7. The basic design of twostroke engines r104 this informative publication is a handson reference source for the design of twostroke engines. How to design a two stroke expansion chamber performance exhaust step 2 duration.
A two stroke cycle engine has twice the number of power strokes than the four stroke cycle engine at the same engine speed. The information used in the programs calculations was taken from the books a. How exhaust port timing affects two stroke performance. Two stroke tuners handbook 2 another mistake commonly made, sometimes even by those who have enjoyed some success in modifying twostroke engines, is to believe in a kind of mechanistic magic.
Software for fine tuning and design of two stroke engine by. This software covers the 3 stage diffuser type expansion chamber exhaust as per equations provided in his book entitled design and simulation of twostroke engines published in 1996. Racingsm software has features for many different areas 2 stroke exhausts development, drag racing features, simulators, carburetor tuning, connectingrod analysis etc with all this knowhow along with lufo racing heritage, we believe this is a very fair price. It covers not only two stroke motorbike engines, but also car engines as well. Softengine engine simulation software 2tbase seven software. Looking for downloadable 3d printing models, designs, and cad files. All engine development is done exclusively with tsr two stroke racing engine design software and. Lets see, he does have a home workshop, but no machine tools, no cad software or cnc milling machines, but since he understands how a two stroke engine operates, its simple, right.
It covers early development work and since it was written in 1968, does not have any of the powerful twostrokes of the later period. Defining the acoustic profile and influencing the powerband exhaust design is a more dynamic science than stringing together a few pipes and tacking on some mufflers. File type pdf two stroke engine expansion chamber design software two stroke engine expansion chamber design software unlocking the secrets of 2 stroke expansion chamber exhausts e1 this is the first video in a series looking at the science and mysteries of 2 stroke expansion chamber exhausts. Racingsm software has features for many different areas 2stroke exhausts development, drag racing features, simulators, carburetor tuning, connectingrod analysis etc with all this knowhow along with lufo racing heritage, we believe this is a very fair price. The basic design of two stroke engines r104 this informative publication is a handson reference source for the design of two stroke engines. The revisions were to be so extensive on the authors the basic design of two stroke engines that what was to be a second edition evolved into a new book. I would have to view it as a history book, but one that is necessary to any complete library of.
The information used in the programs calculations was taken from the books the basic design of the two stroke engine and the book design and simulation of two stroke engines. In his design and simulation of two stroke engines, in chapter two entitled gas flow through two stroke engines, he gave the results of tests with pressure waves in pipes that proved the above explanation. Advantages and disadvantages of twostroke engine over four. Despite internal program complexity, the simulation is straightforward and easy to use. Aussie twostroke engine invention motorbike writer. Engineering acousticssonic supercharging of 2 stroke engines. But because of the limited worldwide activity in two stroke engine development, program sales were limited and further development was curtailed. Twostroke waveaction engine simulation motion software, inc. A complete twostroke pipe has properly tuned header, convergent, belly, divergent and stinger sectionsa difficult process. A simple 3 stage two stroke exhaust calculator based on formulas of g. Thanks to the software two stroke design instead you can enter the data of your cylinder with extreme facility and precision, and then analyze the port areas and the timing area in the engine cycle timing for each phase. A complete two stroke pipe has properly tuned header, convergent, belly, divergent and stinger sectionsa difficult process.
Properly tuned systems can increase the charge of fuel delivered to the cylinders and a related phenomenon can aid. The exhaust designer programme enables the user to design a twostroke exhaust system with ease, then with one click of the mouse, create a pdf document in any of the common paper sizes a4, a3, letter. For this we can go to the tfx website where they demonstrate their testing and data analysis software, or read the paper referenced below titled exhaust gas flow behavior in a twostroke engine. From a 49cc racing engine, to a gp 125 engine, or a 1500 mercurial triple engine, or a 250 kart engine, racingsm software suits all. Tom turner, master two stroke tuner, pipe builder, and the man that developed tsr two stroke racing software designed and built his 424cc yamaha rd400 dragbike to develop and prove his racing design software and prove it, it did. You should try contact wayne wobbly wright he is the master of engmod, he posted recently a dyno sheet of rd400 developed by him in engmod for land speed racing hp on petrol.
Two stroke engine and exhaust design software post by ede. For more detailed info on this go to the bottom of this page. Improve the performance of your two stroke engine with a torqsoft designed exhaust system. Design and build a two stroke engine with no machine shop. For this we can go to the tfx website where they demonstrate their testing and data analysis software, or read the paper referenced below titled exhaust gas flow behavior in a two stroke engine. Nov 02, 2019 for further investigate of the operation of two stroke engines with tuned exhaust pipes it is most appropriate to analyze actual test data. This will get you started by providing, for your engine, the dimensions of an expansion. Two stroke design modification software the following are spreadsheets for different aspects of 2 stroke design modification. Graphic design web design software stroke 7 design. Bigger carburetors, higher compression ratios, altered port timings and expansion. Small values of kh are best suited to grand prix engines with narrow power bands, larger. At stroke 7 design, we shape your brand to be a big thing for tomorrow. Bimotion 2 stroke software has been commercially available and in professional use since 1991. Software for optimal setting and design of engines and racing.