2 stroke porting software free

Part of the problem is understanding the pulse or charge nature of the airflow in a 2stroke engine. What distance from the edge of the exhaust port is the temp measured at when the parameter is entered. Im working on gathering enough parts to build a triple cylinder rd400 and at some point ill need to sort out the porting and exhaust. A dremel is for wood working or engraving your favorite paper weight, but not for porting and polishing on a 2 stroke.

Bimotion 2stroke software has been commercially available and in professional use since 1991. Some 2 stroke porting enhancements you can make to make airflow better in your engine with simple tools. Careful care must be taken to assure that engine will not end up making less power then it did before the engine porting was done. In the design form first select the water cooled and reed induction options from the dropdown menus. Two stroke cylinder porting tips watch this before you start cutting. Crankcase and cylinder porting is probably the most controversial subject among performance 2stroke engine builders.

Not all porting is the same even the word porting has been mis used over the years. The cylinder pressure drops, and the fresh charge transfers thru the transfer ports, over the top of the piston, and out the. The software in addition to defining the geometry of the insert, it also indicates the processing steps for its craft realization. Rk tek uses the latest in 2 stroke design and simulation software, coupled with, practical knowledge that can only be gained through experience and trial and error, to properly modify any engine.

Two stroke designmodification software the following are spreadsheets for different aspects of 2 stroke designmodification. Double cut cylinder shape with radius end sf5l4, size. Ive been waiting to open up my 07 cr250 engine for about 18 months now, pretty much since the day i bought it. Dynomationtwostroke engine simulation motion software, inc. Two stroke engine porting zmod for android apk download. The other is how air density barometric pressure, temp, humidity, and elevation change, affects horsepower. Most of the errors is to choose a less appropriate combination of engine components so that the engine actually ran worse than standart, ever experienced. The worlds leading 2stroke engine simulation software for 3. The businesses and individuals that purchased the original dynomation 2 stroke program were pleased with the capability and accuracy of the software. Bigger carburetors, higher compression ratios, altered port.

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. Calculates port heights from durations, or durations from port heights. It is pretty simple to use provided you have all the data and seems to be pretty accurate from any checks i have done. You can also save and load the data by using the provided functions. An excellent academic book on the theory behind performance tuning for 2stroke motorcycles. We now have a simple 2 stroke expansion chamber design program. This cylinder has two exhaust ports and five transfer ports so enter 2 in the no. The morbidelli 125 twin road racer is a rotary valve engine. Two cycle engine port timing calculator csgnetwork. Software for fine tuning and design of two stroke engine.

After our trial and test, the software was found to be official, secure and free. 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. If this is your first visit, be sure to check out the faq by clicking the link above. Petals reed valve in the 2stroke 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. We call upon twostroke genius ted boyko for the final word. There is no 2stroke displacement limit for our software, for example you can have a 125, 250, 500, 700 singlecylinder and our modules will work flawlessly.

A simple 3 stage two stroke exhaust calculator based on formulas of g. Alvarsson also informed me that he sends out free updates to bimotion software programs to its owners. The newest info i have is the twostroke tuners handbook by gordon jennings. Porting and trenching twostroke engine cases duration. Diy cr250 engine porting honda 2 stroke thumpertalk.

Another quick note on 2 strokes you can change the dynamics and power of a 2 stroke engine a lot just with simple porting. Files are great for busting out of prison or maybe a gal to do her nails, but not for professional porting of any kind. But because of the limited worldwide activity in twostroke engine development, program sales were limited and further development was curtailed. Port matching, porting and trenching twostroke engine cases. Our goal is to achieve the biggest power gains as possible, while maintaining reliability on your 2stroke engine. Im going to show you my single skidoorotax 33578mm x 70mm vs my skidoorotax 340 tnt78mm x 70mm intake ports for comparison. Use this mode if you would like to see the effect of crank size, or rod length changes on the port durations. Changing the power of 2stroke engine is really very simple when you know the basic techniques of 2stroke engines.

Open ofice doesnt allow macros though which makes program usage a bit more time consuming. The description of two stroke engine porting zmod this software made for help out team in first time, but some friend advise this is the time to share. I was reading a thread about a 2 stroke versus a 4 stroke and it occurred to me that if the porting, or timing, of a 2 stroke could be changed, that maybe its maximum torque range could be lowered to an rpm comparable to the 4 stroke, and thus swing the same prop as the 4 stroke. I didnt mess around with the porting yet, but a good port job combined with a tuned pipe work far better than just a tuned pipe by itself. Using apkpure app to upgrade two stroke engine porting zmod, fast, free and save your internet data. Fink is open source distribution software specifically designed for porting applications in mac os x. Scavenging system redesign is more accurate, and doing so can entail complete overhauls of cylinder designs. Service masterlist for 2 strokes finish line engines. Really cool two stroke cylinder porting software youtube. We are known to use huge amounts of epoxy to redesign transfer tunnels to make power where the.

The piston crown opens and closes the exhaust and transfer ports. By combining designs which degner brought from mz with japanese technology in the field. The program calculates the new durations based on the port height adjustments, stock cylinder specs, and barrel height. Assign fixed relationships between transfers and exhaust port. There is no 2 stroke displacement limit for our software, for example you can have a 125, 250, 500, 700 singlecylinder and our modules will work flawlessly.

I only have a dremel and was wondering if i could do anything at all myself to my yz125 before i put it together. Download this app from microsoft store for windows 10 mobile, windows phone 8. We use computer design software to maximize power and torque at any elevation. When set to calculate duration fig 2, you enter the port height adjustments. Our porting leads the way in performance and technology. Crankcase and cylinder porting is probably the most controversial subject among performance 2 stroke engine builders. The exhaust port opens and combustion gas starts down the pipe at supersonic speeds. 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. Great book, but ill guess the world has moved past that info. From beginners in porting,to brazen speed phreaks, this is a great tool if your not a molecular, thermohydrus calculus genius space physicist math scientist. Porting and polishing twostroke motorcycle engines. Download my free calculators spreadsheet to check your computers ability.

Free download here this program is not a part of mota, but it has been put together by the same engineers as a starting point for those wishing to begin from scratch. Two stroke performance tuning a disc partially cut away and attached to the end of the crankshaft opens and closes an inlet port in the side of the crankcase. The litterature on which the website is based on, are the books. Many things will affect the power delivery of twostroke motorcycle engines. This coefficient kh is called the horn coefficient, with typical values between one and two. I have been fascinated with 2 strokes for years but never knew much about how they really worked ports, squish, head design, reeds, etc, etc. Free 2 stroke expansion chamber calculator software update. Each part of the 2stroke cycle can be evaluated and designed with computer software programs. This toolkit offers some basic two stroke engine calculators in hand but also extends to some advanced as well tuning menu. Contemporary twostroke technology was introduced initially to suzuki, and later to yamaha in japan when ernst degner defected from east germany to join suzuki. Part of the problem is understanding the pulse or charge nature of the airflow in a 2 stroke engine. Pipes, silencers, carburetors, reeds and valves are all popular bolton modifications.

The following are spreadsheets for different aspects of 2 stroke designmodification. Since modifying the 2stroke engines require not only a big. After entering the stroke and rod length, select either field to calculate. Processors with a lower number of cores will run the motax expansion chamber optimiser, as will the latest. Port timing basics airgasoline enters the engine from the carburetor at a ratio close to 15. The computer allows us to compare the variables with existing. 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. Two stroke engine and exhaust design software north. Processors with a lower number of cores will run the motax expansion chamber. Small values of kh are best suited to grand prix engines with narrow. It enters via the intake port as the piston rises into the crankcase and then is transferred to the combustion area via the transfer ports as the piston descends and the piston top uncovers the.