Free 2 stroke porting software

Has any one done any kind of porting or polishing to a 2 stroke cylinder themselves. You should only rely on the experience of the very best. Softengine engine simulation software 2tbase seven software. Those of us who have grown up in the japanese twostroke. There is one or more forwardlocated exhaust ports, two or more side transfer ports, and one rear intake port.

Buy products related to porting tools and see what customers say about porting tools on free delivery possible on eligible purchases. Each part of the 2stroke cycle can be evaluated and designed with computer software programs. They make more torque and in my experiences, more reliable. 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. My name is ed erlenbach, im a private tuner specializing in yamaha rd and tz performance in southern california. Next enter the cylinder bore and stroke which are 40. Software for fine tuning and design of two stroke engine. Two stroke performance tuning chapter 3 porting and cylinder scavenging today, when we take a look down the cylinder of a twostroke engine, we find its walls literally filled with ports to handle the induction, transfer and exhaust phases of gas flow through the engine. Port heights port durations required ranges of port mean areas possible ring flutter rpm mean piston speed suggests carburettor size power meter you input expected bmep value adjust port shapes for target areas in cad window.

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. 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. An engine port is an open window in the cylinder wall for the intake or exhaust of fuel mixture airgas. Changing the power of 2stroke engine is really very simple when you know the basic techniques of 2stroke engines. If you are aiming for these qualities, modifying your 2stroke engine is a great strategy. A simple 3 stage two stroke exhaust calculator based on formulas of g. Enthusiasts, tuners, mechanics, gp, drag racing, mx, enduro. Assign fixed relationships between transfers and exhaust port. Port matching, porting and trenching twostroke engine cases. Porting and polishing twostroke motorcycle engines. One field must have a value to calculate the other. 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.

Every 2 stroke engine is different in what can be done to make more hp, since this thread is about porting will try to focus on just that aspect. Two stroke engine porting zmod for android apk download. The worlds leading 2stroke engine simulation software for 3. 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. Type in the duration eg 180, and the program calculates all the other variables. 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. The newest info i have is the twostroke tuners handbook by gordon jennings. Two stroke engine and exhaust design software north.

Mota for windows slide show of features millions of tuning variations possible. Kick ass and take names with this baby software located on the web at this address. Twostroke waveaction engine simulation motion software. How to tips from tj on porting and polishing 2 strokes. Two stroke tuner s 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. The trend in high performance two strokes has continued towards more case volume, however each engine and application differ. These are the files that can function manually without using macros by using open office. Calculates port heights from durations, or durations from port heights. 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. Bigger carburetors, higher compression ratios, altered port timings and expansion. Im looking to start doing all my own porting and was thinking about buying the tsr 2 stroe porting software, has anyone used it, and is there any better software out there. Great book, but ill guess the world has moved past that info. Bimotion 2stroke software has been commercially available and in professional use since 1991. Part of the problem is understanding the pulse or charge nature of the airflow in a 2 stroke engine.

When set to calculate duration fig 2, you enter the port height adjustments. However, you shouldnt just pick any business that you can find anywhere. Two stroke design software the following are spreadsheets for different aspects of 2 stroke design modification. The old adage of stuffing cases on every project just isnt true any more. The software in addition to defining the geometry of the insert, it also indicates the processing steps for its craft realization. Alvarsson also informed me that he sends out free updates to bimotion software programs to its owners. Just a quick update on the progress of the freeware 2 stroke expansion chamber calculator software. Mota software, 2 stroke engine simulation software, 2 stroke exhaust design mota and the new motax. For port work, one company that will help you is 2strokeporting. The other is how air density barometric pressure, temp, humidity, and elevation change, affects horsepower. Since modifying the 2stroke engines require not only a big. Main reason for wanting the software is to play with the port timing, head geometry, and most important of all, pipe design on the computer to. 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. Specialty tools for porting 2 stroke, 4 stroke, cylinders, cylinder heads, 2 stroke case porting, and intakes.

Using apkpure app to upgrade two stroke engine porting zmod, fast, free and save your internet data. Note that you do not require a paypal account as you can use your credit card. At least 512 mb ram and 2 gb free in the hard disk for best windows. If this is your first visit, be sure to check out the faq by clicking the link above. Vannik developments is the originator of two internal combustion engine simulation software suites engmod2t. Determine the level of porting you wish to achieve before you start cutting or grinding. Racingsm software has features for many different areas 2 stroke 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. Show flow efficiency by rpm help you modify port better before action. But because of the limited worldwide activity in twostroke engine development, program sales were limited and further development was curtailed. This software made for help out team in first time, but some friend advise this is the time to share. Finally, enter the exhaust duration of 184deg and the peak power speed of 12500 revsmin and click the design now button. The computer allows us to compare the variables with existing.

Purchase the porting tools you need at our online store. Download my free calculators spreadsheet to check your computers ability. After entering the stroke and rod length, select either field to calculate. Bimotion 2 stroke software has been commercially available and in professional use since 1991. If you are aiming for these qualities, modifying your 2 stroke engine is a great strategy. Software that can accurately be used to design engines and mechanical systems is more in the order of. In motocross its usually a compromise between best peak hp and good early off the pipe power. Test your own theories on porting and exhaust pipe design. Free 2 stroke expansion chamber calculator software update. Intake by piston port and by rotary valve systems is also included in the program. This coefficient kh is called the horn coefficient, with typical values between one and two. Many things will affect the power delivery of twostroke motorcycle engines.

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. Crankcase and cylinder porting is probably the most controversial subject among performance 2 stroke engine builders. This kit is one of the best options for doing mx and dirt bikes of the 100cc, 80cc, 70cc, 50cc, and even down to 30cc, 2 stroke variety. You can also save and load the data by using the provided functions. I only have a dremel and was wondering if i could do anything at all myself to my yz125 before i put it together. This project aims to port extex, a high quality typesetting system developed for unix operating system to macintosh os x using fink, a package management this project aims to port extex, a high quality typesetting system developed for unix operating system to macintosh os x using fink, a package management system. 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. 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. The following are spreadsheets for different aspects of 2 stroke designmodification. Lowell horning 2strokeporting master modified as i felt fitting you have two three really critical elements in a 2 stroke engine that generate power and are porting areas that yield real results if done correctly and in concert with intakecombustionexhaust quality purpose built pipe is critical. Small values of kh are best suited to grand prix engines with narrow power bands, larger. Pipes, silencers, carburetors, reeds and valves are all popular bolton modifications. 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.