Web site community for 2 stroke riders atv, dirt bikes, snowmobiles, quads and more. Cc specialty tools porting and polishing for 2 stroke engines. Head calculations using tsr software pilot odyssey. Twostroke basics how twostroke engines work science. Tsr twostroke racing engine design software at bikelinks. Apr 08, 2007 from an engineering standpoint the tsr software is pretty lowend, but if you dont have any experience with any cad or cfd software, it is probably your best bet. Assign fixed relationships between transfers and exhaust port. The 2 stroke engine is a type of internal combustion engine where one power cycle is completed with two strokes of the piston during only one rotation of crankshaft.
Stroke basically, means the sudden movement of piston which is converted into a rotary motion at crankshaft. A 2 stroke engine is an engine in which there are 2 phases in a cycle of operation of the engine. The other is how air density barometric pressure, temp, humidity, and elevation change, affects horsepower. The illustrated engine features a poppet intake valve. Tsr lan messenger encrypted interoffice communications with no outside interference. A 125cc four stroke engine combusts about 110cc of fa gasses but a 125cc two stroke engine combusts about 180cc of fa gasses. Software for fine tuning and design of two stroke engine. Tsr copy changed files free software for logging changed and modified files. Two stroke performance tuning chapter 3 porting and cylinder scavenging today, when we take a look down the cylinder of a twostroke engine, we find its walls literally filled with ports to handle the induction, transfer and exhaust phases of gas flow through the engine.
Two stroke engine boost bottle article courtesy of lowell horning at 2 stroke. Newpipe will probably generate an ok pipe but knowlegde, experiance and testing is better. A 125cc fourstroke engine combusts about 110cc of fa gasses but a 125cc twostroke engine combusts about 180cc of fa gasses. Tools of the trade, by eric gorr the dirt bike, mx. Tsr photo manager sort through thousand of images in minutes instead of days. The first commercial twostroke engine involving incylinder. Software for optimal setting and design of engines and racing. The software does complete cycle simulation of the whole internal combustion process including the gasdynamics in the pipesducts, ports and plenums air boxes, boost bottles, exhaust boxes etc. Simulation of a twostroke diesel engine for propulsion in waves. Calculates port heights from durations, or durations from port heights. Blair of queens university belfast, and published by the society of automotive engineers. Tsr continuously backup easy to use protection of files, never miss a file. You can estimate the octane requirements and the cranking psi of the engine. We believe that using this software will help your 2 stroke development or racing results on different types of competition.
A sydney engineering company has developed a new twostroke engine that they believe could be used in motorcycles. This is the unique supercharging effect of two stroke engines. From an engineering standpoint the tsr software is pretty lowend, but if you dont have any experience with any cad or cfd software, it is probably your best bet. The tsr software does take a bit more knowledge of engine theory and operation than the race logic templates do of course.
Tsrs programs will get a tuner 90% to the engines potential. Recently searched for tom turners two stroke racing website looking for his two stroke tuning software only to find out that he has retired and shut the website downbummer. The main advantage of twostroke engines is that they can combust more volume of fuelair mixture than the swept volume of the engine. Aussie twostroke engine invention motorbike writer. Those of us who have grown up in the japanese twostroke. 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.
Although a twostroke engine has fewer moving parts than a fourstroke engine, a twostroke is a complex engine with different phases taking place in the crankcase and in the cylinder bore at the same time. Basic 2stroke engine tuning information joe hunt rc. This is the unique supercharging effect of twostroke engines. Ignition accelerates the piston down, forcing the reeds to snap shut. The main advantage of two stroke engines is that they can combust more volume of fuelair mixture than the swept volume of the engine. The program runs mathematical calculations in order to provide a simulation of how the porting changes will affect the engines powerband. The software programs from blair, tsr and bimotion all include this feature as part of the two stroke engine design data crunching its probably the most important head design program to. Tsr seems to have a software program for everything there are many individual software programs involved here. Twostroke engines also have the potential to pack about twice the power into the same space because there are twice as many power strokes per revolution. Using tsr twostroke software tsr seems to have a software program for everything there are many individual software programs involved here. Its called crankcase independent twostroke cits and was invented by former south african motorsport engineer basil van rooyen, director of cits engineering, st ives he says advantages over fourstroke are that the cits engine is more powerful, lighter, smaller.
This time we will learn about the second type of engine i. The program runs mathematical calculations in order to provide a simulation of how the porting changes will affect the engine s powerband. You can estimate the octane requirements and the cranking psi of the engine ignore the squish width on this. The idea is to design each specific engine parameter as completely as possible, then assemble the separate components into an engine to make an outstanding finished product. 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. Simulation of a twostroke diesel engine for propulsion in. Tsr copy changed files free software for logging changed and modified. Checking to make sure your engine is getting air is the easiest part. Tsr two stroke racing software designed and built his 424cc yamaha rd400. Blair sae, dynomotion 2, mota v 50, and tom turners tsr software. Even though this is a complex threedimensional flow process, many researchers have suggested empirical models to describe the process. Vannik developments is the originator of two internal combustion engine simulation software suites engmod2t. With this design, the fuelair mixture is forced into the cylinder by a rotary blower supercharger driven by the engine.
You can work change variables with the bhp brake horsepower formulae. This is in contrast to a fourstroke engine, which requires four strokes of the piston to complete a power cycle during two crankshaft revolutions. On the other hand, while the twostroke engine does not commonly require large. The burnt exhaust gases are not positively forced out by the upwardtravelling piston, so it is essential that the exhaust system offers the minimum amount of resistance to the gases path. A 2stroke engine is an engine in which there are 2 phases in a cycle of operation of the engine. The software does complete cycle simulation of the whole internal combustion process including the gasdynamics in the pipesducts, ports and plenums air. Two stroke engines also have the potential to pack about twice the power into the same space because there are twice as many power strokes per revolution. Really cool two stroke cylinder porting software youtube. It seems to be trying to fix a non problem of two strokes, their pumping losses, two strokes dont have significant pumping losses. The software programs from blair, tsr and bimotion all include this feature as part of the two stroke engine design data crunching its probably the most important head design program to own. This is in contrast to a four stroke engine, which requires four strokes of the piston to complete a power cycle during two crankshaft revolutions.
I have only once in my life experienced air being the problem with a 2 stroke engine not starting. In the original twostroke cycle as developed in 1878, the compression and power stroke of the fourstroke cycle are carried out without the inlet and exhaust strokes, thus requiring only one revolution of the crankshaft to complete the cycle. Head calculations using tsr software by sainty ok here goes with the new specs after redoing both the stroke length and the exhaust opening the very first thing to be done is to calculate the compression ratios both corrected and uncorrected. Recently searched for tom turners two stroke racing website looking for his two stroke tuning software only to find out. We believe that using this software will help your 2stroke development or racing results on different types of competition. All engine development is done exclusively with tsr twostroke racing engine design software and vannik developments two stroke engine simulation 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. Two stroke engine and exhaust design software north. Two stroke engine and exhaust design software post by dawid sat jan 16, 2016 7. 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.
Bmep hp x 6500 l x rpm 2 stroke l engine size in liters. Typically just a visual inspection of the air filter and carburetor area is all it takes. Tsr s programs will get a tuner 90% to the engines potential. The two stroke engine employs both the crankcase and the cylinder to achieve all the elements of the otto cycle in only two strokes of the piston. With 2 stroke engine modification, porting and polishing is the ultimate choice. The fuelair mixture is first drawn into the crankcase by the vacuum that is created during the upward stroke of the piston. 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. Software for fine tuning and design of two stroke engine by. Port matching, porting and trenching twostroke engine cases duration. The combination of light weight and twice the power gives two stroke engines a great powertoweight ratio compared to many four stroke engine designs.
Two stroke engine boost bottle expert tuner lowell horning talks about boost bottles. Tsr two stroke racing software motorcycle engineering. A twostroke or twocycle engine is a type of internal combustion engine which completes a power cycle with two strokes up and down movements of the piston during only one crankshaft revolution. 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.
We have been advancing our 2stroke engines for over 37 years and we are now offering the software we designed to set many of our world records. In contrast, a twostroke engines valve timing may be altered simply by reshaping the holes in its cylinders, and its power output markedly changed by utilizing inertia and resonant effects in its intake and exhaust tracts. Part of the problem is understanding the pulse or charge nature of the airflow in a 2stroke engine. Shers paper sher, 1990 provides a good summary of those models.
Basically a tuner types in engine spec dimensions like the bore and stroke plus all the individual port measurements. 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. With 4 stroke engines, porting, when performed correctly and with the right tools, will result in positive horsepower gains, along with increased fuel efficiency and a smoother running engine. 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. Tsr software creating simple solutions to complex problems. I use the tsr computer software to calculatepredict the horsepower.
A two stroke or two cycle engine is a type of internal combustion engine which completes a power cycle with two strokes up and down movements of the piston during only one crankshaft revolution. Suggested by umg lady gaga stupid love official music video song just dance a cappella artist lady gaga. In my previous article, we learned how 4 stroke engines work. But because of the limited worldwide activity in two stroke engine development, program sales were limited and further development was curtailed. Dragbike to develop and prove his racing design software and prove it, it did.
Tsr watermark image professional watermarking tool. This software is classified as a two cycle wave action simulator it will visually display the wave activity of a running two stroke engine. Jan 19, 2008 i use tsr hemihead, squish and degreeit. Are you tring to determind optimal port timing, build jetting charts.
Crankcase and cylinder porting is probably the most controversial subject among performance 2stroke engine builders. I think mota is a good program for the money, but dont think the results from any engine modeling program are carved in stone. Moreover you can have advices for the development of the engine thanks to the help of tested formulas for intake, exhaust, blowdown and transfer. Tom turner, master two stroke tuner, pipe builder, and the man that developed. It is also important that the validation process is time and money e. How exhaust port timing affects two stroke performance.
The combination of light weight and twice the power gives twostroke engines a great powertoweight ratio compared to many fourstroke engine designs. The design of the exhaust is more critical in a two stroke engine than it is in a four stroke engine. This software is classified as a two cycle wave action simulator it will visually display the wave activity of a running twostroke engine. Two stroke engine boost bottle article courtesy of lowell horning at. But because of the limited worldwide activity in twostroke engine development, program sales were limited and further development was curtailed. At the moment, we have a special 2 stroke bike collection. At the moment, we have a special 2stroke bike collection. The two stroke was recognized as having substantial theoretical promise, as it delivered a power stroke for each 360 degrees. Two stroke engine and exhaust design software post by dawid. It took a little longer than i anticipated to receive a copy of dynomation 2 for this article but part of the delay was on my end i took a long vacation a day or two after it arrived. Software for optimal setting and design of engines and. The port is opened or closed as the piston passes up and down the cylinder. Only ten years ago the two stroke engine was widely and quite understandably thought to be a reasonable alternative to the four stroke only when minimum weight and manufacturing cost were allimportant considerations.
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