Calculate the needed exhaust and transfer port durations to match the desired peak power rpm. This is the place to talk about anything related to two stroke road race bikes. For 4t the free lotus singlecylinder engine simulation is supposed to be quite good but like engmod it wants a lot of data to be gathered and entered. The way a two stroke motor works causes them to be f. The businesses and individuals that purchased the original dynomation 2 stroke program were pleased with the capability and accuracy of the software. Dirt bike home dirt bike parts exhaust 2 stroke exhausts due to the covid19 virus shipping may be delayed and some shipping methods are not available 2 stroke dirt bike exhausts. The measurement required is the vertical distance from the crankshaft axis to the top edge of the exhaust port. An engines exhaust port can be thought of as a sound generator. This phenomenon was first discovered in the 1950s by walter kaaden, who was working at the east german company mz. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Four 4 stroke exhaust pipe calculator download apk free. These bikes has been known to punch out big hp with twin carbs and exhaust. I know the less exhaust pipe curves the better and where it does curve try and make them long and flowing. Assign fixed relationships between transfers and exhaust port.
We will include automatic pipe squelton and cad support in order to have. I tried a few free ones, but the first attempt at making a pipe from those didnt. For introductory material on 2 stroke engines please see the following links. For a 2 stroke with expansion chamber and no boost bottle then everywhere. Our example has an after market 50cc performance cylinder with a bridged exhaust port. A simple 3 stage two stroke exhaust calculator based on formulas of g. This small java applet uses design rules according to, and, to size a tuned pipe for a 2 stroke piston engine. Design and simulation of two stroke engines gordon p. Two stroke engines often have a high powertoweight ratio, power being available in a narrow range of rotational speeds called the power. Expansion chamber exhaust design software i have just bought and installed this 2 stroke wizard tuned pipe expansion chamber design software package. 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.
We now have a simple 2 stroke expansion chamber design program. So whether you have a 50cc road bike, a 500cc motocrosser or a classic racer, we will design the perfect exhaust system for you. Exhaust designer programme the exhaust designer programme enables the user to design a two stroke exhaust system with ease, then with one click of the mouse, create a pdf document in any of the common paper sizes a4, a3, letter. They are so simple and fun that ive always enjoyed tinkering with them.
Bimotion 2 stroke software has been commercially available and in professional use since 1991. The 2 stroke exhaust system uses an expansion chamber the prominent bulge in the exhaust pipe to increase the engines horsepower. Top of exhaust port location entering a value for this parameter will produce exhaust timing figures. Two 2 stroke exhaust expansion chamber calculator apps on. It requires values for stroke, piston height, conrod length, and wrist pin offset. The objectives of this project are to study, develop and maybe sell a software for pipe designing. The calculations are assuming a speed of sound in the exhaust gas, which is not known exactly. The official home page of our 2 stroke wizard tuned pipe.
In short, the expansion chamber creates a pump, by using the momentum and pressure of the exhaust gases, and squeezes more air and fuel into the cylinder during the intake stroke. The revisions were to be so extensive on the authors the basic design of two stroke engines that what was to be a second edition evolved into a new book. The inputs will be engine specification and the outputs will be pipe dimensions. Bigger carburetors, higher compression ratios, altered port timings and expansion. 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. New feature of racingsm software, the 2 stroke exhaust segment splitter. For a 2 stroke engine the tuned pipe is the section of the exhaust system that begins at the exhaust port and ends at. In the design form first select the water cooled and reed induction options from the dropdown menus. So, i got a gas powered 2 stroke craftsman leaf blower for free from a coworker.
Using apkpure app to upgrade 2 stroke exhaust calculator, fast, free and save your internet data. This coefficient kh is called the horn coefficient, with typical values between one and two. Twostroke waveaction engine simulation motion software. Performance fabrications is dedicated to manufacturing the finest bespoke hand crafted exhaust systems available. Mota software, 2 stroke engine simulation software, 2 stroke exhaust design mota and the new motax. The exhaust port opens and combustion gas starts down the pipe at supersonic speeds. Type in the duration eg 180, and the program calculates all the other variables. The worlds leading 2stroke engine simulation software for 3. Torqsoft twostroke exhaust system designer programme. How a 2 stroke works your 2 stroke motor is an air pump. This app can be use for finding inside diameter and length of four 4 stroke exhaust pipe with specifictype of an engine e.
Free 2 stroke expansion chamber calculator software update. This program calculates the dimensions for both double and triple stage diffuser expansion chambers from a few basic engine dimensions. There are many ways to boost the power, one of which is by installing a tuned pipe. You can also save and load the data by using the provided functions.
Two stroke engine and exhaust design software page 2. Improve the performance of your two stroke engine with a torqsoft designed exhaust system. In a two stroke 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. In a 2 stroke, we want to maximize the retention of that finite fuel charge. Pro circuits clearance corner holds many products from 2 stroke exhaust, graphic kits, engine parts to apparel, all at discounted prices. After our trial and test, the software was found to be official, secure and free. This cylinder has two exhaust ports and five transfer ports so enter 2 in the no. Read my expansion chamber theory page to get a full understanding of how expansion chambers work and click here to read more of the details of this spreadsheet calculator. Two stroke tuners handbook 2 another mistake commonly made, sometimes even by those who have enjoyed some success in modifying two stroke engines, is to believe in a kind of mechanistic magic.
The expansion chamber program will guide you to design a basic well working pipe. Two stroke design software the following are spreadsheets for different aspects of 2 stroke design modification. Here is the official description for 2 stroke wizard tuned pipe. Kaaden understood that there was power in the sound waves coming from the exhaust system, and opened up a whole new field in two stroke theory and tuning.
This will get you started by providing, for your engine, the dimensions of an expansion chamber with a 2 stage or 3stage diffuser. It is designed to make it easy to test different approaches of tuning degrees and usage of bimotions input editor for the simulation program modelno2. Mota software, 2 stroke engine simulation software, 2 stroke exhaust design. North american twostrokes general two stroke discussion. Two stroke engine and exhaust design software north. My professional 2 stroke expansion chamber design software is more sophisticated than other programs that only use a few basic formulas. The description of 2 stroke exhaust calculator a simple 3 stage two stroke exhaust calculator based on formulas of g. Free 2 stroke exhaust expansion chamber calculator. Engineering acousticssonic supercharging of 2 stroke. The story goes, his brother in law and family were all over his house this past weekend. Calculates port heights from durations, or durations from port heights. It was nice outside, so the bil and my coworker decided to go out and do.
Dedicated to the free exchange of information among two stroke road racing motorcycle enthusiasts around the world. We shall send you a pdf document with the templates for manufacturing your exhaust. How to bend a conetwo stroke pipe model solidworks forums. Two stroke cylinder porting tips watch this before you start cutting. But because of the limited worldwide activity in two stroke engine development, program sales were limited and further development was curtailed. 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. Two 2 stroke exhaust expansion chamber calculator using 3 methods. Method 1 and method 2 two and three stage diffuser. The objective of this work is to present the software tool antonia, which has been developed to facilitate a quantitative analysis of perfusionweighted mri pwi datasets in general as well as the subsequent multiparametric analysis of additional datasets for the specific purpose of acute ischemic stroke patient dataset evaluation.
978 201 1294 1201 22 1485 71 1370 628 107 818 277 1030 409 943 1399 1205 792 488 1064 50 1113 358 244 1479 696 1365 448 246 318 1468 436 762 413 529 1028