Two stroke cylinder porting software for free

Feb 16, 2017 two stroke cylinder porting tips watch this before you start cutting. There are many ways to boost the power, one of which is by installing a tuned pipe. Our many years of 2 stroke engine tuning includes our never ending work in performance cylinder modifications. Two stroke cylinder porting tips watch this before you. These are the intake ports sorry i couldent find a better picture the water jackets run through the. Bigger carburetors, higher compression ratios, altered port timings and expansion. We have two pipes available for the popular 292 yamaha single engine. If you are aiming for these qualities, modifying your 2stroke engine is. Contrast this with the pro stock ports shown below note. A twostroke or twocycle engine is a type of internal combustion engine which completes a. Two stroke performance tuning chapter 3 porting and cylinder scavenging today, when we take a look down the cylinder of a two stroke engine, we find its walls literally filled with ports to handle the induction, transfer and exhaust phases of gas flow through the engine.

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. Finally, enter the exhaust duration of 184deg and the peak power speed of 12500 revsmin and click the design now button. Website designed at homestead list your business for free. Great book, but ill guess the world has moved past that info. All 2stroke porting packages include the following. 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. Macdizzys two stroke technology exchange the two stroke engine capital of the internet. Cleaningup the rough edges of the port windows inside of the cylinder bore is really all you need to do to the port windows, as anything further, and youre messing with the port timing keep in mind, were out to build a little twostroke screamer, not make a boat anchor out of your cylinder. Discussion in chainsaw started by ndigity26, jan 5, 20. Each intake port can be locked to a fixed timing relation with the exhaust port. Service masterlist for 2 strokes finish line engines.

Thats what all the ports on the cylinder wall are for. 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. My name is ed erlenbach, im a private tuner specializing in yamaha rd and tz performance in southern california. Cylinder porting ski doo as of 2005 rk tek is porting cylinders using cnc vertical machining centers cnc porting.

Porting is a metal finishing process performed to the passageways of a twostroke cylinder and crankcases, that serves to match the surface texture, shapes and sizes of port ducts, and the timing and angle aspects of the port windows that interface with the cylinder bore. Oct 04, 2011 changing the power of 2 stroke engine is really very simple when you know the basic techniques of 2 stroke engines. This toolkit offers some basic two stroke engine calculators in hand but also. It will simulate one of the cylinders of a multi cylinder two stroke engine provided that the cylinders are identical in layout and dimensions and each cylinder has a seperate exhaust and induction system. Each company sells a full compliment of accessories for all sorts of hobbyist activities. Simple twostroke cylinder porting tutorial youtube. Macdizzys two stroke technology exchange trx yfs yfz. Check out mcdizzys 2 stroke page, there is alot of info on there on some of the software available, as well a cylinder port mapping. 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. However, you shouldnt just pick any business that you can find anywhere. For port work, one company that will help you is 2strokeporting. Just a quick update on the progress of the freeware 2 stroke expansion chamber calculator software. Cleaningup the rough edges of the port windows inside of the cylinder bore is really all you need to do to the port windows, as anything further, and youre messing with the port timing keep in mind, were out to build a little twostroke screamer, not make a.

Sep 30, 2012 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. Crankcase and cylinder porting is probably the most controversial subject among performance 2 stroke engine builders. 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. A typical ktm 2 stroke from the factory will easily do 210 psi and pound out plenty of torque more than a 250 or 300cc 4 stroke could ever hope for. Dynomationtwostroke engine simulation motion software, inc. Software for fine tuning and design of two stroke engine. The full race pipe is developed for modified oval racing and delivers 70 hp at 9000 rpm with full race porting, reed valve intake and a larger carb. Late model cylinder castings are extremely efficient and, in most cases, not much can be done to increase air flow without destroying the velocity of the charge. Really cool two stroke cylinder porting software youtube.

Two stroke performance tuning amazed at the gains to be made, particularly in reliability, and to a lesser extent in. The ford twoliter shown above in stock trim was capable of delivering 115 horsepower at 5500 rpm for a bmep of 6 psi. The pistonport type engines intake timing opens and closes before and after top dead center at the. Porting calc, jetting calc, squish calc, crank calc, oil ratio calc, and boost bottle calc. They are so simple and fun that ive always enjoyed tinkering with them.

Porting is a metal finishing process performed to the passageways of a two stroke cylinder and crankcases, that serves to match the surface texture, shapes and sizes of port ducts, and the timing and angle aspects of the port windows that interface with the cylinder bore. All engine development is done exclusively with tsr two stroke racing engine design software and. But because of the limited worldwide activity in twostroke engine development, program sales were limited and further development was curtailed. 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. Since modifying the 2stroke engines require not only a big. Design and subsequent cylinder head port modification are two different fields of expertise. Intake by piston port and by rotary valve systems is also included in the program. The clear mods button clears all porting mods, restoring the stock cylinder timing. Those of us who have grown up in the japanese two stroke. May 07, 2018 we have two pipes available for the popular 292 yamaha single engine.

Two stroke engine and exhaust design software north. Late model cylinder castings are extremely efficient and, in most cases, not much can be done to increase air. You should only rely on the experience of the very best. 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. Jul 18, 2017 porting and polishing two stroke motorcycle engines. Unless you have a deep passion for two stroke tuning, are willing to spend money on software and porting equipment, and are comfortable throwing away botched cylinders, i would recommend having a reputable professional carry out any desired port modifications. Part of the problem is understanding the pulse or charge nature of the airflow in a 2 stroke engine.

I only have a dremel and was wondering if i could do anything at all myself to my yz125 before i put it together. Slim profile head for tiny two stroke engines or motors 2c, 2 cycle cylinders. 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. It will simulate one of the cylinders of a multicylinder twostroke engine provided that the cylinders. 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. The twostroke cylinder head certainly doesnt look very exciting but its design has a large bearing on how well your engine will run. The old adage of stuffing cases on every project just isnt true any more. Here are some useful resources with several 2 stroke porting theories and formulas. 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. A high compression 4 stroke can do as little as 120 psi per cylinder. In motocross its usually a compromise between best peak hp and good early off the pipe power. Cylinder porting takes time, patience, special tools and more than a basic knowledge of air flow and velocity. Everything you need to know about the twostroke cylinder.

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. As of 2005 rk tek is porting cylinders using cnc vertical machining centers cnc porting. The higher resolutions will give finer port outlines, but you must have photo software that will allow you to print in actual size. Apr, 2015 has any one done any kind of porting or polishing to a 2 stroke cylinder themselves. Update 2011 free air case made that could handle both 277f72mm cylinders and 550f76mm cylinders. Mota and its related set of programs have been developed to simulate the performance of highoutput single cylinder two stroke engines. Unlocking the secrets of 2 stroke porting, part 2 how to trace and measure ports. We also have a milder pipe that is turned for 7500 rpm and delivers 5055 hp depending on cylinder porting. This is a poor example that confuses cylinder head design with cylinder head porting techniques. Heres how shaving off miniscule ammounts of metal can drastically improve your speed. Softengine engine simulation software 2tbase seven software. The worlds leading 2stroke engine simulation software for 3. 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.

Unless you have a deep passion for twostroke tuning, are willing to spend money on software and porting equipment, and are comfortable throwing away botched cylinders, i would recommend having a reputable professional carry out any desired port modifications. The most popular source for cylinder porting tools and accessories is cc specialty in tennessee 18007626995. Software for fine tuning and design of two stroke engine by. At least 512 mb ram and 2 gb free in the hard disk for best windows. Next enter the cylinder bore and stroke which are 40. Rk tek uses the latest in 2 stroke design and simulation software, coupled with, practical knowledge that can only be gained through. 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. But because of the limited worldwide activity in two stroke engine development, program sales were limited and further development was curtailed. It will simulate one of the cylinders of a multicylinder twostroke engine provided that the cylinders are identical in layout and dimensions and each cylinder has a seperate exhaust and induction system. If you are aiming for these qualities, modifying your 2stroke engine is a great strategy.

There is no 2 stroke displacement limit for our software, for example you can have a 125, 250, 500, 700 single cylinder and our modules will work flawlessly. All 2 stroke porting packages include the following. The 14sr kit is the 2 stroke porting kit for 100cc and under mx bikes, chainsaws, scooters, mini bikes, rc vehicles, dirtbikes, and all small displacement 2 strokes. We use porting tools that work, and with such a vast experience in this very delicate and demanding area we can usually provide a job that is the equal of anything from across the globe. Twostroke waveaction engine simulation motion software. If you are aiming for these qualities, modifying your 2 stroke engine is a great strategy. Intro to using spreadsheets, my spreadsheets overview. All engine development is done exclusively with tsr twostroke racing engine design software and. Mota and its related set of programs have been developed to simulate the performance of highoutput single cylinder twostroke engines.

Changing the power of 2stroke engine is really very simple when you know the basic techniques of 2stroke engines. Port matching, porting and trenching twostroke engine cases. Bimotion 2stroke software has been commercially available and in professional use since 1991. Buy products related to porting tools and see what customers say about porting tools on free delivery possible on eligible purchases. The tool handles and bits are the secret to porting. Calculates port heights from durations, or durations from port heights.

To purchase from a list of all porting and polishing kits offered by cc specialty tools, including cylinder head kits, porting abrasive kits, 2 stroke porting kits, rubber abrasive kits, cross buff abrasive kits, 220 230 240 volt motor kits and many other porting kits click this link. May 07, 2018 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. The newest info i have is the twostroke tuners handbook by gordon jennings. Porting and polishing twostroke motorcycle engines. Note that you do not require a paypal account as you can use your credit card. Those of us who have grown up in the japanese twostroke. I see a lot of people asking questions about porting feel free to add to this thread all you fellow modders first things first here you got to understand how 2 stroke engines operate just because you know the basics dont mean nothing here is a. Download my free calculators spreadsheet to check your computers ability. Mota software, 2 stroke engine simulation software, 2 stroke exhaust design. Two stroke cylinder porting tips watch this before you start cutting. 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.

You can print the image on transparancy film to use as a porting. Moreover you can have advices for the development of the engine thanks to the help of tested formulas for intake, exhaust. Two stroke design software the following are spreadsheets for different aspects of 2 stroke designmodification. Has any one done any kind of porting or polishing to a 2 stroke cylinder themselves. Free 2 stroke expansion chamber calculator software update. Tips on how to port a two stroke cylinder, what to donot do and how to do it right. The newest info i have is the two stroke tuners handbook by gordon jennings. This aftermarket racing gm pro stock head was capable of 0 horsepower at 9500 rpm with a bmep of 238 psi.