There are many ways to boost the power, one of which is by installing a tuned pipe. This section describes the basic function and the most important processes in the 2stroke cycle a tuner need to consider in general and with the bimotion tuning software in particular. The computer allows us to compare the variables with existing. Fourstroke carbs need to atomize the fuel more so than a twostroke carb because so much of the fuel shears along the intake port and separates from the mixture stream. 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. Hey chris, im really sorry but when it comes to 2 stroke tuning i cant offer any help. Two stroke engine and exhaust design software north. The software uses mathematical formulas that are approximations of. Two stroke performance tuning volume of the cylinder with the piston at tdc figure 2.
An engine port is an open window in the cylinder wall for the intake or exhaust of fuel mixture airgas. Two stroke motors are more efficient that four strokes for a few reasons. Porting calculator calculate the amount of exhausttransfer overlap to see if you need to change the port height for. I have the book, but its nice to have as a pdf as well and a good reference for those who dont know about it. A typical state of the art fourstroke carb is the kehin cr. Our goal is to achieve the biggest power gains as possible, while maintaining reliability on your 2stroke engine.
They are so simple and fun that ive always enjoyed tinkering with them. 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. Ive simply never had any experience with 2 stroke engines and have never had any reason to do my own research into their tuning. Assign fixed relationships between transfers and exhaust port. It allows tuners to program virtually any combination of engine control, power adders and auxiliary devices, and accurately delivers proper amounts of fuel and correct ignition timing for.
Software for fine tuning and design of two stroke engine by ntproject. The intake and transfer ports allow fuel mixture to enter the cylinder, and. Ktm300tpi and husky 300i 2018on complete rebuild kit tsp. Following any tuning product purchased, we offer trackside assistance to ensure that the bike is set up correctly. They are easy to work with and do not require excessive motor knowledge to achieve desired engine performance. There is one or more forwardlocated exhaust ports, two or more side transfer ports, and one rear intake port.
Contemporary twostroke technology was introduced initially to suzuki, and later to yamaha in japan when ernst degner defected from east germany to join suzuki. Each part of the 2stroke cycle can be evaluated and designed with computer software programs. The exhaust tuning of a 2stroke is designed to preserve the positive pulse going down the pipe and reflect that positive pulse back up the pipe. Bigger carburetors, higher compression ratios, altered port timings and expansion. Check the porting of your cylinder and compare to the recommendations given by proff. Twostroke carburetors are perfect practice for novice mechanics.
Ktm300excxc and husky 300tetx carby 2017on top end rebuild kit tsp. Everything you need to know about the twostroke cylinder. Racingsm software for 2stroke development, also for 4strokes in some modules, create 2t exhaust. The idea is to get an education in cause and effect. The way a two stroke motor works causes them to be f. 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. An excellent academic book on the theory behind performance tuning for 2stroke motorcycles. By combining designs which degner brought from mz with japanese technology in. Bimotion 2stroke software has been commercially available and in professional use since 1991. Racingsm software has features for many different areas 2stroke exhausts development, drag racing features, simulators, carburetor tuning, connectingrod analysis etc with all this knowhow along with lufo racing heritage, we believe this is a very fair price. The businesses and individuals that purchased the original dynomation 2 stroke program were pleased with the capability and accuracy of the software. 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.
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. Two stroke performance engine tuning performance parts. But because of the limited worldwide activity in twostroke engine development, program sales were limited and further development was curtailed. Processors with a lower number of cores will run the motax expansion chamber optimiser, as will the latest. A lesser work would have surely passed into nostalgia. After our trial and test, the software was found to be official, secure and free. The software in question the inexpensive stuff is great for someone who just does not have the math skills to wade through what seem to be a text book of complex formulas. For introductory material on 2 stroke engines please see the following links.
The engine porting determines whether high rpm or mid range rpm is where the engine. The software in addition to defining the geometry of the insert, it also indicates the processing steps for its craft realization. The official home page of our 2 stroke wizard tuned pipe. The trend in high performance two strokes has continued towards more case volume, however each engine and application differ. Mota is an engine simulation program suitable for everyone from the enthusiast to the university researcher from the beginner racer to the professional tuner. For a 2 stroke engine the tuned pipe is the section of the exhaust system that begins at the exhaust port and ends at. Are you tring to determind optimal port timing, build jetting charts. Hi performance two stroke porting software program youtube. Split your calculated 2stroke exhaust up to 42 sections with regular length or even more with irregular lengths. This toolkit offers some basic two stroke engine calculators in hand but also extends to some advanced as well tuning menu. Each part of the 2stroke cycle can be evaluated and designed. Setup two stroke is the universal software for optimal tuning of all 2stroke engines. 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. Ktm300excxc and husky 300tetx 20172018 complete rebuild kit tsp.
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. Geared specifically for gp and kart racers, this hardcover treasure has turned out to be a great reference source for questions on the logic and concepts that pertain to tuning a 2stroke for maximum performance. The way a two stroke motor works causes them to be fairly noisy and a bit inefficient. A racing engine exhaust system uses an expansion chamber at the end of the pipe which is basically two cones that reverse themselves prior to the end stinger where the spent exhaust is allowed to.
Below are notes on my free spreadsheet of free 2 stroke calculators. The old adage of stuffing cases on every project just isnt true any more. In motocross its usually a compromise between best peak hp and good early off the pipe power. Computer input requirements are indicated for the following software programs. New feature of racingsm software, the 2stroke exhaust segment splitter. Mota for windows slide show of features millions of tuning variations possible. We are 2 stroke dirt bike specialists and offer a variety of services to meet your needs, situated just off the a50 in stoke on trent, which means we are easily accessible from the motorway. We shall send you a pdf document with the templates for manufacturing your exhaust. Twostroke carbs are usually found on leaf blowers, motorized bikes and mopeds.
Unless you have a deep passion for twostroke tuning, are willing to spend money on software and porting equipment, and are comfortable. Tech tune racing motorcross race winning performance 2. Port matching, porting and trenching twostroke engine cases. If nobody else on here can step in with their experience. Performance engineering 2stroke tuning we specialise in honda 2strokes, covering the cr range of motorcross bikes, the nsr250 street bikes, and hrc grand prix 125, 250, and 500s. Here is the official description for 2 stroke wizard tuned pipe. Improve the performance of your twostroke engine with a torqsoft designed exhaust system. A tuned pipe has a set of cones divergent meaning the cone gets bigger and convergent meaning the cone gets smaller. Two stroke motors are very touchy in the tuning process, if they run too rich, they bog down and quit. Ktm300excxc and husky te300 20082016 top end rebuild kit tsp.
547 1338 124 505 468 1023 371 296 1502 431 557 555 1132 1489 1153 1568 927 291 651 1020 465 507 674 1180 841 1096 43 688 1181 344 1486 642 1238