Calculates port heights from durations, or durations from port heights. Twostroke race bikes for superrich motorbike writer. Discover over 419 of our best selection of 2 stroke racing engines on with topselling 2 stroke racing engines brands. A twostroke cylinder consists of exhaust, transfer, and occasionally inlet ports true inlet ports are only found on piston or rotary valve controlled engines. Each part of the 2stroke cycle can be evaluated and designed. Computer input requirements are indicated for the following software programs. The calculated specific timearea and blowdown are shown. This fuel is suitable for motocross racing, dirt track racing, long. The home of ultimate two stroke motorcycle road racing. Twostroke oil is expensive, and you need about 4 ounces of it per gallon of gas. Two stroke designmodification software the following are spreadsheets for different aspects of 2 stroke designmodification. Twostroke race bikes for superrich posted on 12th october, 2015 by mark hinchliffe it seems there is a lucrative market in making limitededition gp race bikes for superrich clients, with two european companies making twostroke racers.
I am very proud of the riders i helped and sponsored and there is an appendix. They engaged the services of an engineer named zoller to build a 250 racer, which ultimately won the isle of man tt in 1938. They were in the business of manufacturing economical twostroke motorcycles and stood to profit from changing the twostrokes image. There is quite a large section on changing the face of production racing and into the marlboro series and the lc era and through the kr1s and rgv eras. Moreover you can have advices for the development of the engine thanks to the help of tested formulas for intake, exhaust. Msd single cylinder programmable ignition boxes 4217. The 500 cc 2stroke racing motorcycles that used to be popular in the 500gp races would produce peak power output of around 180 hp, but in a very narrow rpm range. Software for fine tuning and design of two stroke engine. Below are notes on my free spreadsheet of free 2 stroke calculators. Portuguese website, related to 2stroke performance tuning with many diferent prototypes, such as supermotards, quads, road racing bikes, motocross. You can also save and load the data by using the provided functions.
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. In motocross its usually a compromise between best peak hp and good early off the pipe power. The way a two stroke motor works causes them to be f. From a 49cc racing engine, to a gp 125 engine, or a 1500 mercurial triple engine, or a 250 kart engine, racingsm software suits all. Each intake port can be locked to a fixed timing relation with the exhaust port. Tech tune racing motorcross race winning performance 2. Port matching, porting and trenching twostroke engine cases. Free 2stroke tuning info, pdfs and software free tuning and maintenance info, plus links to our original tuning pages that started it all off. They are so simple and fun that ive always enjoyed tinkering with them. Taking 49 national records and holding the world record set in. Red line synthetic oil two cycle oils free shipping on.
The engine porting determines whether high rpm or mid range rpm is where the engine. Small values of kh are best suited to grand prix engines with narrow power bands, larger. Two stroke engine and exhaust design software post by gerrit. We use computer design software to maximize power and torque at any elevation. Looking for downloadable 3d printing models, designs, and cad files. To say that they were ultimately successful would be gross understatement. Two stroke engine and exhaust design software north. 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. 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.
A simple 3 stage two stroke exhaust calculator based on formulas of g. My name is ed erlenbach, im a private tuner specializing in yamaha rd and tz performance in southern california. Its called crankcase independent twostroke cits and was invented by former south african motorsport engineer basil van rooyen, director of cits engineering, st ives he says advantages over fourstroke are that the cits engine is more powerful, lighter, smaller, cheaper. 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. With 2 stroke engine modification, porting and polishing is the ultimate choice. There are 3 exhaust ports one large central port flanked by 2 smaller side ports boosters. Best value 2 stroke racing engines great deals on 2. We believe that using this software will help your 2stroke development or racing results on different types of competition. At least 512 mb ram and 2 gb free in the hard disk for best windows. Software for fine tuning and design of two stroke engine by ntproject. Processors with a lower number of cores will run the motax expansion chamber optimiser, as will the latest. Twostroke petrol engines are preferred when mechanical simplicity, light weight, and high powertoweight ratio are design priorities. Turbo and even supercharger setups of various configurations can be very useful, however, they are often more complicated with 2 stroke tuning than with 4 stroke applications on a tangent, i did witness a 50cc turbo 2 stroke bike that would do over 150mph, but i digress. Diy moto fix website for fixing rebuilding repairing.
A sydney engineering company has developed a new twostroke engine that they believe could be used in motorcycles. This coefficient kh is called the horn coefficient, with typical values between one and two. This is of some benefit in a fourstroke engine, but can be a big gain in twostroke engines. Mota software, 2 stroke engine simulation software, 2 stroke exhaust design. Cc specialty tools porting and polishing for 2 stroke engines. It is important to us that you are happy with all the work that is carried out so you come back to us and share positive feedback with others about the service you received. Download my free calculators spreadsheet to check your computers ability. There are many ways to boost the power, one of which is by installing a tuned pipe. Our goal is to achieve the biggest power gains as possible, while maintaining reliability on your 2stroke engine. I found most other software work on outdated blair and jennings formulas. So whether you have a 50cc road bike, a 500cc motocrosser or a classic racer, we will design the perfect exhaust system for you. Support racingsm by subscribing our youtube channel. The physics of a 2stroke engine is very complex compared to that of a 4stroke when we are trying to optimize horsepower, reliability, and reasonable width of the power band. They deliver increased spark energy and voltage through the entire rpm range and provides the user with a variety of programmable.
Petals reed valve in the 2 stroke engine with reed valve admission, the identification of petals more adapted to the reed valve and to the engine is essential to maximize the performance starting from the intake phase. The old adage of stuffing cases on every project just isnt true any more. So whether you have a 50cc road bike, a 500cc motocrosser or a classic racer. This toolkit offers some basic two stroke engine calculators in hand but also extends to some advanced as well tuning menu. We believe that using this software will help your 2 stroke development or racing results on different types of competition. He will do one of two things,hang up, or if he is a good one,start explaining the complex nature of fluid dynamics, sonic wave pressures and the effects temperature on the speed and timing it takes to hit an open exhaust port at 6500 rpmsthis being said. For manufacter and tuner of two stroke engine, ntproject has developed a series of software to help in the development of the engine and its components.
The trend in high performance two strokes has continued towards more case volume, however each engine and application differ. Assign fixed relationships between transfers and exhaust port. We shall send you a pdf document with the templates for manufacturing your exhaust. The port heights, widths, areas, directions they flow, and relationships to one another all have a significant influence on how the engine will behave. Aussie twostroke engine invention motorbike writer.
If you are aiming for these qualities, modifying your 2stroke engine is a great. Software for optimal setting and design of engines and. It covers my early days in the motorcycle trade, on to starting my own mc business then forming my tuning business. The software in addition to defining the geometry of the insert, it also indicates the processing steps for its craft realization. Improve the performance of your twostroke engine with a torqsoft designed exhaust system. These msd single cylinder programmable ignition boxes are designed for use on a variety of single cylinder motorcycle type 2 and 4stroke engines. The tz250b is a vtwin road racing motorcycle produced by yamaha for the 1991 racing season. At the moment, we have a special 2 stroke bike collection. Motor oil, all sport twostroke, synthetic, 1 gallon, set of 4. Softengine engine simulation software production 2tbase seven software.
With 4 stroke engines, porting, when performed correctly and with the right tools, will result in positive horsepower gains, along with increased fuel efficiency and a smoother running engine. Twostroke waveaction engine simulation motion software, inc. Improve the performance of your two stroke engine with a torqsoft designed exhaust system. You would burn about a gallon of oil every 1,000 miles if you used a twostroke engine in a car. From the bellmouth of the carburetor, to the insert of the reed valve and the reed petals, at the studied of the cylinder ports, until to the balance of the crankshaft, thanks at our software you could optimize your engine and to develop new.
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