Two stroke exhaust design software

But the real star of the show is its heart, the high tech two stroke engine. Once again before i start thanks to the author of the website. A performance exhaust system is a characterizing element for any internal combustion conveyance. Two stroke engine and exhaust design software north. By rayivers, november 5, 2009 in motorcycle engineering. They are so simple and fun that ive always enjoyed tinkering with them. 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. There are pipes and silencers for racing, recreation, quiet riding and even usfs approved spark arrestors. Pro circuit has built a reputation around our exhaust systems. All this is mated to an srt six speed cassette gearbox. The pipe builder would make a pipe as the program dictated and then chunk the.

Here is the official description for 2 stroke wizard tuned pipe. 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. But because of the limited worldwide activity in two stroke engine development, program sales were limited and further development was curtailed. It is also very good for expansion chamber designs. New version of 2t exhaust calculator it is a freeware 2 stroke expansion chamber exhaust calculator program download at. I found most other software work on outdated blair and jennings formulas. Assign fixed relationships between transfers and exhaust port. So whether you have a 50cc road bike, a 500cc motocrosser or a classic racer, we will design the perfect exhaust system for you. Design and simulation of twostroke engines is a unique handson information source. 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.

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. 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. Our goal is to achieve the biggest power gains as possible, while maintaining reliability on your 2 stroke engine. 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. How to design a two stroke expansion chamber performance exhaust step 2. 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. This v4 576cc features a double counter rotating crankshaft, an electronic fuel injection, 56 x 58. So whether you have a 50cc road bike, a 500cc motocrosser or a classic racer, we will design the perfect exhaust. There are a few software programs available for 2 stroke simulations.

How to design a two stroke expansion chamber performance. A simple 3 stage two stroke exhaust calculator based on formulas of g. Improve the performance of your two stroke engine now with these pre designed exhaust plans. For introductory material on 2 stroke engines please see the following links. The suter mmx 500 racing motorcycle is an impressive beast. Near the end you will be presented with the latest and best software for design and analysis of 2 stroke pipes. Two stroke engine and exhaust design software page 2.

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. We shall send you a pdf document with the templates for manufacturing your exhaust. 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. This program calculates the dimensions for both double and triple stage diffuser expansion chambers from a few basic engine dimensions. New feature of racingsm software, the 2 stroke exhaust segment splitter. He is a master pipe welder and has software based on the engine parameters that will make a pipe that will work. The exhaust port opens and combustion gas starts down the pipe at supersonic speeds. 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. We offer two stroke exhaust for all of the popular motorcycles and atvs. Once i have that completed i would understand the geometry that i need and have an envelopescaffold defining the geometry. We use computer design software to maximize power and torque at any elevation. You should only rely on the experience of the very best.

The chambers is the single most important thing when it comes to tuning the 2 stroke engine. 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. Calculates port heights from durations, or durations from port heights. Simply overlay the supplied pdf templates on mild steel sheet and cut the metal section using tin snips. This is the place to talk about anything related to two stroke road race bikes. The higher the rpm we design for, the greater the intake and exhaust overlap we build into the cam lobes. For port work, one company that will help you is 2 stroke porting. How eccalc agrees with the real life exhaust pressure graphs from blair. Free 2 stroke expansion chamber calculator software update. I guess 2 stroke exhaust system design is all about tradeoffs, and i. The way a two stroke motor works causes them to be f. You can also save and load the data by using the provided functions. Racingsm software 2stroke exhaust calculator lufo youtube. For a 2 stroke engine the tuned pipe is the section of the exhaust system that begins at the exhaust port and ends at.

This small java applet uses design rules according to 22, 23, and 24, to size a tuned pipe for a 2 stroke piston engine. However, you shouldnt just pick any business that you can find anywhere. Performance fabrications is dedicated to manufacturing the finest bespoke hand crafted exhaust systems available. The intent of the competition is to provide universities with an. Small values of kh are best suited to grand prix engines with narrow power bands, larger.

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. Moreover you can have advices for the development of the engine thanks to the help of tested formulas for intake, exhaust. A complete two stroke pipe has properly tuned header, convergent, belly, divergent and stinger sectionsa difficult process. Engineering acousticssonic supercharging of 2 stroke. Come join the discussion about your favorite engines performance, classifieds, troubleshooting, maintenance, and more. 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 compromises in the 2 stroke design to be cleverly efficient in producing power pulses eliminates the opportunity to do the things. The calculations are assuming a speed of sound in the exhaust gas, which is not known exactly. Without a pair of really good chambers you will never get much power from you rd 350 ypvs. How to design a two stroke expansion chamber performance exhaust step 6 duration. My professional 2 stroke expansion chamber design software is more sophisticated than other programs that only use a few basic formulas. After our trial and test, the software was found to be official, secure and free.

Everything2stroke forum since 2004 a forum community dedicated to all 2 stroke engine vehicle owners and enthusiasts. This coefficient kh is called the horn coefficient, with typical values between one and two. 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. The cylinder pressure drops, and the fresh charge transfers thru the transfer ports, over the top of the piston, and out the. If you are aiming for these qualities, modifying your 2 stroke engine is a great strategy. Two stroke engines often have a high powertoweight ratio, power being available in a narrow range of rotational speeds called the power. 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.

The official home page of our 2 stroke wizard tuned pipe. How twostroke expansion chambers work, and why you should. North american two strokes general two stroke discussion. Two stroke design software the following are spreadsheets for different aspects of 2 stroke design modification. The one i have been using is call mota, from ian williams tuning. Improve the performance of your two stroke engine with a torqsoft designed exhaust system. 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 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. Aussie twostroke engine invention motorbike writer. There are many ways to boost the power, one of which is by installing a tuned pipe. Exhaust and intake tuning building, tips and techniques.

Twostroke waveaction engine simulation motion software. Split your calculated 2 stroke exhaust up to 42 sections with regular length or even more with irregular lengths. Mota software, 2 stroke engine simulation software, 2 stroke exhaust design. Specificaly written for gokarts engines, but will do any 2 stroke. Software for fine tuning and design of two stroke engine. This small java applet uses design rules according to, and, to size a tuned pipe for a 2 stroke piston engine. The worlds leading 2stroke engine simulation software for 3.