Two stroke porting software

This is the third of a series of videos on the topic of 2 stroke engine. The cylinder pressure drops, and the fresh charge transfers thru the transfer ports, over the top of the piston, and out the. The two heat release curves from above could also represent 2 different types of cylinder head geometries with the same fuel. Changing the power of 2stroke engine is really very simple when you know the basic techniques of 2stroke engines. Bimotion 2stroke software has been commercially available and in professional use since 1991. Two strokes are all about making their power with high rpms. We use computer design software to maximize power and torque at any elevation. Scavenging system redesign is more accurate, and doing so can entail complete overhauls of cylinder designs.

Another quick note on 2 strokes you can change the dynamics and power of a 2 stroke engine a lot just with simple porting. The next link will go over some basic principles behind the goal of porting and polishing. Everyone has their own style of porting the cylinder. The tsr software does take a bit more knowledge of engine theory and operation than the race logic templates do of course. Each company sells a full compliment of accessories for all sorts of hobbyist activities. Softengine engine simulation software 2tbase seven software. Fink is open source distribution software specifically designed for porting applications in mac os x. This is the height of the piston from the lower edge to the perimeter of the. Software for fine tuning and design of two stroke engine by. My name is ed erlenbach, im a private tuner specializing in yamaha rd and tz performance in southern california. It keeps track of the pressure waves moving in the intake and exhaust systems and their effects on portpipe pressures and flow. Moreover you can have advices for the development of the engine thanks to the help of tested formulas for intake, exhaust. The businesses and individuals that purchased the original dynomation 2 stroke program were pleased with the capability and accuracy of the software. New version of 2t exhaust calculator it is a freeware 2 stroke.

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. Two stroke boost bottles race gas high octane fuel cylinder base gasket. Piston height mandatory parameter if performing any timing calculation. Since modifying the 2stroke engines require not only a big. This means that to run motax, you will need a post 2010 computer which is preferably a desktop, driven by an intel i7 4core processor. 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. There is one or more forwardlocated exhaust ports, two or more side transfer ports, and one rear intake port. Unless you have a deep passion for two stroke tuning, are willing to spend money on software and porting equipment, and are comfortable throwing away botched cylinders, i would recommend having a reputable professional carry out any desired port modifications. So whether you have a 50cc road bike, a 500cc motocrosser or a classic racer. New feature of racingsm software, the 2stroke exhaust segment splitter.

Everything you need to know about the twostroke cylinder. Heres how shaving off miniscule ammounts of metal can drastically improve your speed. 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 north. Bimotion 2 stroke software has been commercially available and in professional use since 1991. Compared to a four stroke, it is pretty easy getting equal or better torque to horsepower numbers from four strokes. Part of the problem is understanding the pulse or charge nature of the airflow in a 2stroke engine. Porting and polishing twostroke motorcycle engines. Test your own theories on porting and exhaust pipe design. Two stroke engine and exhaust design software post by gerrit sun jan 17, 2016 10.

Each part of the 2stroke cycle can be evaluated and designed with computer software programs. Two stroke cylinder porting tips watch this before you start cutting. The exhaust port opens and combustion gas starts down the pipe at supersonic speeds. Not all porting is the same even the word porting has been mis used over the years. Many things will affect the power delivery of twostroke motorcycle engines. Processors with a lower number of cores will run the motax expansion chamber optimiser, as will the latest.

No one has the real answer as to what is the best port and polish job. Two stroke engine porting zmod for android apk download. So whether you have a 50cc road bike, a 500cc motocrosser or a classic racer, we will design the perfect exhaust system for you. It requires values for stroke, piston height, conrod length, and wrist pin offset. The trick to porting a two stroke is knowing what changes to make. Blair of queens university belfast, and published by the society of automotive engineers.

Enlarging the easy to get at bits without knowing what you are doing is unlikely to yield an improvement. Two stroke design modification software the following are spreadsheets for different aspects of 2 stroke design modification. Twostroke waveaction engine simulation motion software, inc. The first 3 videos will cover simple mapping of the exhaust port and transferring that in to 2t exhaust calc software for the purpose of expansion. Most of the errors is to choose a less appropriate combination of engine components so that the engine actually ran worse than standart, ever experienced. Pipes, silencers, carburetors, reeds and valves are all popular bolton modifications.

Hi performance two stroke porting software program youtube. These two links are a great guide, and will help you and your understanding of porting and polishing. Software for fine tuning and design of two stroke engine. Great tool for those who are building exquisite format exhausts, one of the largest benefits of this module is that it can be used with any exhaust formula results. 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. We are known to use huge amounts of epoxy to redesign transfer tunnels to make power where the competition wont. Macdizzys two stroke technology exchange trx yfs yfz. Im working on gathering enough parts to build a triple cylinder rd400 and at some point ill need to sort out the porting and exhaust. 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.

Oct 04, 2011 changing the power of 2 stroke engine is really very simple when you know the basic techniques of 2 stroke engines. The best way for the cylinder is to use a slip roller like the one in picture 1. This first link will discuss terms and the 2 stroke cycle. The first curve could use a high efficient squish band, which speeds up the combustion by adding more kinetic velocity dependent energy to the gas mixture. Many things will affect the power delivery of two stroke motorcycle engines. No previous knowledge of the two stroke cycle engine is required just input the required data and then run mota to set in motion this powerful process. Assign fixed relationships between transfers and exhaust port. We shall send you a pdf document with the templates for manufacturing your exhaust. Cc specialty tools will always be the company to go to for all your porting and polishing tools and equipment. Great book, but ill guess the world has moved past that info.

Improve the performance of your two stroke engine with a torqsoft designed exhaust system. Aug 09, 2014 each company sells a full compliment of accessories for all sorts of hobbyist activities. Hi performance two stroke porting software program diospeeddemon. 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. Port matching, porting and trenching twostroke engine cases. 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. Note that we want the actual stroke, not the crankshaft throw which will be half the stroke. Two stroke designmodification software the following are spreadsheets for different aspects of 2 stroke designmodification. This software is classified as a two cycle wave action simulator it will visually display the wave activity of a running twostroke engine. The computer allows us to compare the variables with existing. Split your calculated 2stroke exhaust up to 42 sections with regular length or even more with irregular lengths. Macdizzys two stroke technology exchange the two stroke engine capital of the internet. It gradually rolls the metal tighter and tighter until you have a nice cylinder, then the top roller lifts and you slip the metal off the end of the roller pictures 27.

There are many places in which we can send our cylinder to and get it ported and polished. Porting calculator calculate the amount of exhausttransfer overlap to see if you need to change the port height for. Crankcase and cylinder porting is probably the most controversial subject among performance 2stroke engine builders. This software is classified as a two cycle wave action simulator it will visually display the wave activity of a running two stroke engine. I didnt mess around with the porting yet, but a good port job combined with a tuned pipe work far better than just a tuned pipe by itself. Calculates port heights from durations, or durations from port heights.

It was this concept which ultimately brought success to the two stroke, both as an economical power source for transport and as a powerful, lightweight power source for competition. Each intake port can be locked to a fixed timing relation with the exhaust port. But because of the limited worldwide activity in twostroke engine development, program sales were limited and further development was curtailed. The measurement required is the vertical distance from the crankshaft axis to the bottom edge of the inlet port. The most popular source for cylinder porting tools and accessories is cc specialty in tennessee 18007626995. Our goal is to achieve the biggest power gains as possible, while maintaining reliability on your 2 stroke engine. Bigger carburetors, higher compression ratios, altered port timings and expansion. This toolkit offers some basic two stroke engine calculators in hand but also extends to some advanced as well tuning menu. But because of the limited worldwide activity in two stroke engine development, program sales were limited and further development was curtailed. 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. There are two ways to form the metal for cones or cylinders. Calc software for the purpose of expansion chamber exhaust calculations. Our porting leads the way in performance and technology. 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.

The tool handles and bits are the secret to porting. The other is how air density barometric pressure, temp, humidity, and elevation change, affects horsepower. Improve the performance of your twostroke engine with a torqsoft designed exhaust system. 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.