2 stroke tuned pipe software

This small java applet uses design rules according to, and, to size a tuned pipe for a 2 stroke piston engine. The pipe on our tuned 2strokes is gradually expanding in diameter from the engine to the point where it enters the muffler. Engineering acousticssonic supercharging of 2 stroke. I am looking for any equations or rules of thumb for calculating theoretical 2stroke engine horsepower. 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.

Free 2 stroke expansion chamber calculator software update. Ask our shadetree mechanics 2 stroke wizard pipe builder. The way a two stroke motor works causes them to be f. Varying 2stroke stinger diameter motorcycle engineering.

Improving the performance of twostroke motorcycle with tuned adjustable exhaust pipe article pdf available in research journal of applied sciences, engineering and technology 12. I know the less exhaust pipe curves the better and where it does curve try and make them long and flowing. The text makes it seem as if a smaller stinger enhances performance over the entire tuned range of the pipe, but i always thought that it was mainly a lowend boost too. But because of the limited worldwide activity in two stroke engine development, program sales were limited and further development was curtailed. 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. We will collect all comments in an effort to determine whether the 2 stroke wizard tuned pipe software is reliable, perform as expected and deliver the promised features and functionalities. Near the end you will be presented with the latest and best software for design and analysis of 2 stroke pipes. Split your calculated 2stroke exhaust up to 42 sections with regular length or even more with irregular lengths. After our trial and test, the software was found to be official, secure and free. However, you shouldnt just pick any business that you can find anywhere. You should only rely on the experience of the very best. The basic principle of the tuned pipe is making use of the moving air masses in the exhaust to assist in the scavenging the process whereby the exhaust gases are removed and replaced with unburnt mixture of a 2stroke engine. 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.

Available in a full range of sizes for kids and adults. Enthusiasts, tuners, mechanics, gp, drag racing, mx, enduro. You know that changing the exhaust pipe and pipe length on your boat can have a marked effect on the engines power characteristics, but do you by how much and why. As the forces in a twostroke 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. If you try to run a stock carb and pipe on a big bore kit, with no tuning, have fun. If you are aiming for these qualities, modifying your 2stroke engine is a great strategy. I didnt like bimotions pipe design software so i bought and used yours. Road to the most powerful two stroke ever part 2 i can do this. That shape is an important part of the exhaust tuning. This will get you started by providing, for your engine, the dimensions of an expansion chamber with a 2stage or 3stage diffuser. I use the tsr computer software to calculatepredict the horsepower. You only have to put one cylinder value in, note from eliot.

Pete tibbitts emerged victorious with his torqsoft designed exhaust system. The calculations are assuming a speed of sound in the exhaust gas, which is not known exactly. Bigger carburetors, higher compression ratios, altered port timings and expansion. Bsa bantams only have three gears and thus the exhaust design had to give a wide power band. Test your own theories on porting and exhaust pipe design.

Developed by pedro, with more than 20 000 lines of code, all the knowhow applied to software comes from us and also a lot from the legendary portuguese 2stroke tuner lufo racing, this software is directed for all 2stroke. A complete twostroke pipe has properly tuned header, convergent, belly, divergent and stinger sectionsa difficult process. The shape of the exhaust pipe is not simply that of a constant diameter pipe, such as on a 4stroke engine. Note that you do not require a paypal account as you can use your credit card. Everything2stroke forum since 2004 a forum community dedicated to all 2 stroke engine vehicle owners and enthusiasts. Exhaust length,exhaust pipe,induction calculation, tuned exhaust pipe length calculation for singletwinsfours. Direct comparison between different types of exhausts for the twostroke engine, on the left you can see the engine and its exhaust, in the center the progression curves of the. Ive only ever heard of on belt driven supercharged 2 stroke that made the buggy faster then bone assed stock, and i am the one that built it. Racingsm software 2stroke exhaust calculator lufo youtube. Scalvini pipes usa products handcrafted italian pipes.

You seem to be a plug and play guy, with no mindset on tuning. A two stroke 125cc engine with standard exhaust system can combust no more than 125cc of fuel air mix. The software uses mathematical formulas that are approximations of. We also have a simple 2stroke expansion chamber design program. The formulas on this page were taken from fourstroke performance tuning by a graham bell.

But if the baffle uses many cones of differing angles then using a formula cant accurately determine the tuned length because a formula doesnt take into account the modified. The cylinder pressure drops, and the fresh charge transfers thru the transfer ports, over the top of the piston, and out the. Best expansion chamber motorized bicycle forum motored. I got an email saying the new version of the two stroke wizard tuned pipe program is out, and they have a new add on program which creates plans for a duel power pipe, which is a cone inside the expansion chamber made of perforated metal looks like. Kxguru discussion forum for kx dirt and dual sport bikes, others welcome. The shape of the exhaust pipe is not simply that of a constant diameter pipe, such as on a 4 stroke engine. Developed by pedro, with more than 20 000 lines of code, all the knowhow applied to software comes from us and also a lot from the legendary portuguese 2 stroke tuner lufo racing, this software is directed for all 2 stroke. Exhaust length,exhaust pipe,induction calculation, speaking of 4 2 1 extractors, this is the wrong way to do it on a four cylinder engine. The basic principle of the tuned pipe is making use of the moving air masses in the exhaust to assist in the scavenging the process whereby the exhaust gases are removed and replaced with unburnt mixture of a 2 stroke engine. Mota for windows slide show of features millions of tuning variations possible. New feature of racingsm software, the 2stroke exhaust segment splitter. There are many ways to boost the power, one of which is by installing a tuned pipe. Show your love for twostrokes and order yours today. A tuned pipe is made of between 3 and 4 characteristic sections depending on the desired effect.

Finally, enter the exhaust duration of 184deg and the peak power speed of 12500 revsmin and click the design now button. How twostroke expansion chambers work, and why you should care. Belt driven superchargers are a waste of time on a 2 stroke. I dont have access to a 2 stroke engine simulation program. Please dont dismiss this page as just another regurgitation of common knowledge. The worlds leading 2stroke engine simulation software for 3. Download it here go to the 2t exhaust calc menu item. This site contains both well known pipe info and details never before discussed. When the descending piston first exposes the exhaust port on the cylinder wall, the exhaust flows out powerfully due to its pressure without assistance from the expansion chamber so the diameterarea over the length of the first portion of the pipe is constant or near constant with a divergence of 0 to 2 degrees which preserves wave energy. The official home page of our 2 stroke wizard tuned pipe. The way a two stroke motor works causes them to be fairly noisy and a bit inefficient. 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. Return to the 2 stroke wizard tuned pipe details page. Mota software, 2 stroke engine simulation software, 2 stroke exhaust design mota and the new motax.

Has anyone experimented with varying the diameter of the tailpipe section including silencer to dial in a 2 stroke pipe. A simple 3 stage two stroke exhaust calculator based on formulas of g. Near the end you will be presented with the latest and best software for design and analysis of 2. On a twostroke engine, an expansion chamber or tuned pipe is a tuned exhaust system used to enhance its power output by improving its volumetric efficiency history. Twostroke waveaction engine simulation motion software. The book was published 25 years ago and is still published. The program creators had read and used some of gordon jennings. Two strokes can function with significantly better power if they are aided in these 4 ways. The tuned pipe is critical to the performance of twostroke motors because it greatly enhances the motors ability to remove exhaust gases from the cylinder as well as improve the flow of fresh mixture into the cylinder for the next combustion cycle. The pipe on our tuned 2 strokes is gradually expanding in diameter from the engine to the point where it enters the muffler.

The result was 25hp at the rear wheel with the engine coming on the pipe at 7000 revsmin and producing usefull power to 1 revsmin using the original cast iron 125cc. These bikes has been known to punch out big hp with twin carbs and exhaust. Here is the official description for 2 stroke wizard tuned pipe. You can also save and load the data by using the provided functions. We now have a simple 2 stroke expansion chamber design program. This expansion chamber is not the product of simple correlations as for other products that abound on the web, but an automatic design created by mota which is a full wave action 2 stroke engine simulator. Engineering acousticssonic supercharging of 2 stroke engines. I have modded a dirtbikes expansion pipe before with decent results. Two stroke engine and exhaust design software north. I am looking for any equations or rules of thumb for calculating theoretical 2 stroke engine horsepower. Those used in this program have been chosen for petrol engines, and are in the range 50cc up to about 500cc per cylinder. This coefficient kh is called the horn coefficient, with typical values between one and two.

Look very good and i understand this program gave excellent performing pipes to others. A complete two stroke pipe has properly tuned header, convergent, belly, divergent and stinger sectionsa difficult process. The other day, i noticed the physical similarity between those motors and the motor in my ms390. Jun 08, 2015 2 stroke exhaust calculator racingsm software this is a module for complex 2 stroke exhaust calculation having in account several variables according to lufo racing tuner philosophy. I dont have access to a 2stroke engine simulation program. The books ive read seem to indicate a tradeoff between enhanced pipe action and power output reducing diameter and motor overheating with a toosmall pipe has anyone found this to be a problem in real life. More by who is weekly newsletter of discounts, coupons and latest offers for software like 2 stroke wizard tuned pipe 1. Also, bimotion is professional software, designed to calculate anything.

A tuned pipe has a set of cones divergent meaning the cone gets bigger and convergent meaning the cone gets smaller that are built to cause echoes or pressure waves to reflect back, which if done properly can increase the power of the engine. Pdf improving the performance of twostroke motorcycle. Scalvini 2 stroke 4life tee shirt this tee shirt is made from a cottonpolyester blend and features the scalvini logo on the front plus logos on left and right sleeves. Come join the discussion about your favorite engines performance, classifieds, troubleshooting, maintenance, and more. For a 2 stroke engine the tuned pipe is the section of the exhaust system that begins at the exhaust port and ends at the end of the converging section. I like the fact that i can see what pressurevacuum is present in. Bmep hp x 6500 l x rpm 2 stroke l engine size in liters. Scalvini 2stroke 4life tee shirt this tee shirt is made from a cottonpolyester blend and features the scalvini logo on the front plus logos on left and right sleeves. The official home page of the 2 stroke wizard tuned pipe 4t exhaust header wizard software. I got a 4 stroke for reliability, but have done mods. Next enter the cylinder bore and stroke which are 40. They are so simple and fun that ive always enjoyed tinkering with them. Mota software, 2 stroke engine simulation software, 2 stroke exhaust design. I then fine tuned my formulas to match his results for the pressure waves and horsepower graph.

Small values of kh are best suited to grand prix engines with narrow power bands, larger. No, there for small cc 2 strokes engines used on rc cars, go carts, scooters, pit bikes, etc. It is shaped like an elongated cone when viewed from the side. As javapipe is meant for small rc car engines, like 2 to 10ccs or so. You could create a hardcopy of the program window, though, using your. For port work, one company that will help you is 2strokeporting.