Two stroke exhaust design software

For a 2 stroke engine the tuned pipe is the section of the exhaust system that begins at the exhaust port and ends at. Engineering acousticssonic supercharging of 2 stroke. By rayivers, november 5, 2009 in motorcycle engineering. Two stroke design software the following are spreadsheets for different aspects of 2 stroke design modification. We shall send you a pdf document with the templates for manufacturing your exhaust. Improve the performance of your two stroke engine with a torqsoft designed exhaust system. There are many ways to boost the power, one of which is by installing a tuned pipe.

A performance exhaust system is a characterizing element for any internal combustion conveyance. But because of the limited worldwide activity in two stroke engine development, program sales were limited and further development was curtailed. They are so simple and fun that ive always enjoyed tinkering with them. If you are aiming for these qualities, modifying your 2 stroke engine is a great strategy.

Our goal is to achieve the biggest power gains as possible, while maintaining reliability on your 2 stroke engine. Calculates port heights from durations, or durations from port heights. Here is the official description for 2 stroke wizard tuned pipe. After our trial and test, the software was found to be official, secure and free. A simple 3 stage two stroke exhaust calculator based on formulas of g. Two stroke engines often have a high powertoweight ratio, power being available in a narrow range of rotational speeds called the power. How to design a two stroke expansion chamber performance exhaust step 6 duration. Exhaust tuning theory and system design weve all heard the magazines talk about back pressure and most of what they say is utter cac so how do we ensure we have a good, efficient, exhaust system bearing in mind that back pressure, any back pressure, is a. Two stroke engine and exhaust design software page 2. Specificaly written for gokarts engines, but will do any 2 stroke. The suter mmx 500 racing motorcycle is an impressive beast. That part of the overlap design is common to all 4 stroke engines in order to gain additional charging of the cylinder with fuel mix at high rpm. Many had crankcases that were not part of the induction system and they had intake vales but the exhaust was a port in the cylinder wall, most required a blower to run.

Performance fabrications is dedicated to manufacturing the finest bespoke hand crafted exhaust systems available. The official home page of our 2 stroke wizard tuned pipe. New version of 2t exhaust calculator it is a freeware 2 stroke expansion chamber exhaust calculator program download at. Twostroke waveaction engine simulation motion software.

Everything2stroke forum since 2004 a forum community dedicated to all 2 stroke engine vehicle owners and enthusiasts. Improve the performance of your two stroke engine now with these pre designed exhaust plans. 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. Small values of kh are best suited to grand prix engines with narrow power bands, larger. Simply overlay the supplied pdf templates on mild steel sheet and cut the metal section using tin snips. I guess 2 stroke exhaust system design is all about tradeoffs, and i. This small java applet uses design rules according to, and, to size a tuned pipe for a 2 stroke piston engine. Two stroke engine and exhaust design software north. For a 2 stroke engine the tuned pipe is the section of the exhaust system that 2 stroke wizard tuned pipe design software ian williams tuning 15 replies. Racingsm software 2stroke exhaust calculator lufo youtube.

North american two strokes general two stroke discussion. 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. On a two stroke engine, an expansion chamber or tuned pipe is a tuned exhaust system used to enhance its power output by improving its volumetric efficiency. Come join the discussion about your favorite engines performance, classifieds, troubleshooting, maintenance, and more. Direct comparison between different types of exhausts for the two stroke engine, on the left you can see the engine and its exhaust, in the. In a twostroke engine, the end of the combustion stroke and the beginning of the compression stroke happen simultaneously, with the intake and exhaust or scavenging functions occurring at the same time. Software for fine tuning and design of two stroke engine. The one i have been using is call mota, from ian williams tuning. You can also save and load the data by using the provided functions. However, you shouldnt just pick any business that you can find anywhere. New feature of racingsm software, the 2 stroke exhaust segment splitter.

A complete two stroke pipe has properly tuned header, convergent, belly, divergent and stinger sectionsa difficult process. 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. I found most other software work on outdated blair and jennings formulas. The cylinder pressure drops, and the fresh charge transfers thru the transfer ports, over the top of the piston, and out the. This program calculates the dimensions for both double and triple stage diffuser expansion chambers from a few basic engine dimensions. 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. 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.

How twostroke expansion chambers work, and why you should. This coefficient kh is called the horn coefficient, with typical values between one and two. How to design a two stroke expansion chamber performance exhaust step 2. Exhaust and intake tuning building, tips and techniques. For introductory material on 2 stroke engines please see the following links. 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. Once i have that completed i would understand the geometry that i need and have an envelopescaffold defining the geometry. This small java applet uses design rules according to 22, 23, and 24, to size a tuned pipe for a 2 stroke piston engine. You should only rely on the experience of the very best. The intent of the competition is to provide universities with an.

Moreover you can have advices for the development of the engine thanks to the help of tested formulas for intake, exhaust. For port work, one company that will help you is 2 stroke porting. The author, having designed and developed many two stroke engines, offers practical and empirical assistance to the engine designer on many topics ranging from porting layout, to combustion chamber profile, to tuned exhaust. My professional 2 stroke expansion chamber design software is more sophisticated than other programs that only use a few basic formulas. It is also very good for expansion chamber designs. Once again before i start thanks to the author of the website. The compromises in the 2 stroke design to be cleverly efficient in producing power pulses eliminates the opportunity to do the things. There are pipes and silencers for racing, recreation, quiet riding and even usfs approved spark arrestors. We use computer design software to maximize power and torque at any elevation. All this is mated to an srt six speed cassette gearbox. The higher the rpm we design for, the greater the intake and exhaust overlap we build into the cam lobes.

This v4 576cc features a double counter rotating crankshaft, an electronic fuel injection, 56 x 58. Assign fixed relationships between transfers and exhaust port. He is a master pipe welder and has software based on the engine parameters that will make a pipe that will work. Split your calculated 2 stroke exhaust up to 42 sections with regular length or even more with irregular lengths. 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. Exhaust pipe design with cone layout software by paul crowe if you have ever tried to layout a conic section on sheet metal, cutting just the right piece, that when rolled over and joined on edge, you have a cone with the exact shape, size and angled openings desired, you know its not easy. The worlds leading 2stroke engine simulation software for 3. But the real star of the show is its heart, the high tech two stroke engine. There are a few software programs available for 2 stroke simulations.

Without a pair of really good chambers you will never get much power from you rd 350 ypvs. The exhaust port opens and combustion gas starts down the pipe at supersonic speeds. This is the place to talk about anything related to two stroke road race bikes. Aussie twostroke engine invention motorbike writer. So whether you have a 50cc road bike, a 500cc motocrosser or a classic racer, we will design the perfect exhaust. How eccalc agrees with the real life exhaust pressure graphs from blair. 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. Near the end you will be presented with the latest and best software for design and analysis of 2 stroke pipes. The pipe builder would make a pipe as the program dictated and then chunk the. So whether you have a 50cc road bike, a 500cc motocrosser or a classic racer, we will design the perfect exhaust system for you. The way a two stroke motor works causes them to be f. We offer two stroke exhaust for all of the popular motorcycles and atvs. How to design a two stroke expansion chamber performance.