Macdizzy two stroke porting software

Thermaldynamics is in the automobile manufacturers industry. 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. Visit the glamis sand dunes and see the trx250r, lt80s yfs200s blasters and banshees yfz350s in action. Two stroke principles although a two stroke engine has less moving parts than a four stroke engine, a two stroke is a complex engine because it relies on gas dynamics. Think of this membrane such as the valve on the engine 4 stroke. Come join the discussion about your favorite engines performance, classifieds, troubleshooting, maintenance, and more. This book is not a beginners manual for learning 2 stroke engines it is more of a study of the intricacies of these type of engines. 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. Two stroke engine and exhaust design software north. The computer allows us to compare the variables with existing. 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 basic video of a two stroke.

Two stroke cylinder porting tips watch this before you. In fact, and some of you arent going to believe this it is possible to make most two stroke engines so reliable theyll keep. Cc specialty tools porting and polishing for 2 stroke, 4 stroke, rotary engines. That is how a two stroke engine completes a power cycle in only 360 degrees of. Twostroke waveaction engine simulation motion software. Ive been waiting to open up my 07 cr250 engine for about 18 months now, pretty much since the day i bought it. 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. The other is how air density barometric pressure, temp, humidity, and elevation change, affects horsepower.

North american two strokes general two stroke discussion two stroke engine and exhaust design software this is the place to talk about anything related to two stroke road race bikes. I have lots of other two stroke documents, this is a piston port engine. This manual provides comprehensive, step by step, instructions for the use of sport port from race logic. Assign fixed relationships between transfers and exhaust port. The old adage of stuffing cases on every project just isnt true any more. It took a little longer than i anticipated to receive a copy of dynomation 2 for this article but part of the delay was on my end i took a long vacation a day or two after it arrived.

Macdizzy is ok, there is all the formulas on his site as well as some cool project bikes. More modern porting designs use 2 additional smaller ports in addition to this. Jul 18, 2017 porting and polishing two stroke motorcycle engines. Hi all, does anyone have an original set of tsr, engmod2t or mota v5 two stoke tuning software. Best cylinder porting, engine porting, 2stroke porting, 4. Subsequently, the meshing process is implemented using avl fire software. Two stroke tuners handbook 2 another mistake commonly made, sometimes even by those who have enjoyed some success in modifying two stroke engines, is to believe in a kind of mechanistic magic.

We use computer design software to maximize power and torque at any elevation. Each part of the 2stroke cycle can be evaluated and designed with computer software programs. Part of the problem is understanding the pulse or charge nature of the airflow in a 2stroke engine. Working with paul gast of fast by gast, don hardy orange county jet ski and ed miller of performance jetski pjs in the 80s, and kawasaki in the 90s and yamaha in 2000. The ports found within a twostroke cylinder in combination with the. High end piston port 2 stroke don terrills speedtalk. Everything on a rotary valve engine except the intake port is the same and yamaha started with piston ported engines so there is information about them also. Port timing is related directly to the characteristics of the power band. My new youtube video on the newest version of porting calculator is at this new version includes a. Crankcase and cylinder porting is probably the most controversial subject among performance 2stroke engine builders.

Apr, 2015 has any one done any kind of porting or polishing to a 2 stroke cylinder themselves. First i been using sims since the last days of the macdizzy. Motorcycle mechanic institute motorcyle education programs a. Page 2 of 2 porters posted in mach z mach 1 formula iii triples. Many things will affect the power delivery of twostroke motorcycle engines. No previous knowledge of the two stroke cycle engine is required just input the required data and then run mota to set in motion this powerful process. Hi performance two stroke porting software program youtube. The state closed off much of it on account of the tree huggers who were more concerned with the vegetation attaching itself to the soft ground than people using the land for anything fun like camping or riding. In motocross its usually a compromise between best peak hp and good early off the pipe power.

Cylinder heads are made for porting, the more fuel and air you can get in, and the faster you can do it, the faster you will go. If you are aiming for these qualities, modifying your 2 stroke engine is a great strategy. Pismo river macdizzys two stroke technology exchange. Other books to his credit are modern engine tuning, twostroke performance tuning and forced induction performance tuning.

Membranes with tongue totaling 6 or more will be leaders in the race, when the engine with reed valve number 2 or 4 out of breath. As most of you know i martin marino am a world leader in two stroke 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. Once the dataentry part is finished with this software, the fun really begins. The trend in high performance two strokes has continued towards more case volume, however each engine and application differ. Yamaha is still at it, i would like to pull apart a brand new yz250 and see whats going on in there but there is only so much that you can do to these little motors before you run out of. Visit the glamis sand dunes and see the trx250r, lt80s. Thanks for the info, ive been reading all macdizzy s stuff, thats. Improve the performance of your two stroke engine with a torqsoft designed exhaust system. Cc specialty tools will always be the company to go to for all your porting and polishing tools and equipment. 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. Its amazing just how willing 4 stroke guys are to give out ideas.

The user manual to this software is the book design and simulation of twostroke engines which is 623 pages in length. Porting and polishing twostroke motorcycle engines. If you are aiming for these qualities, modifying your 2stroke engine is a great strategy. Pismo is somewhere around 2000 acres of pure silica, though it used to be much larger. 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. The first 3 videos will cover simple mapping of the exhaust port and transferring that in to 2t exhaust calc software for the purpose of expansion. Simple twostroke cylinder porting tutorial youtube. Piston port is the simplest of the designs and the most common in small twostroke engines. Macdizzy s two stroke technology exchange the two stroke engine capital of the internet. Small changes have major implications in two stroke porting. Even a few degrees here can make a substantial difference. Macdizzys two stroke technology exchange trx yfs yfz. Pipes, silencers, carburetors, reeds and valves are all popular bolton modifications. Thanks for the info, ive been reading all macdizzy s stuff, thats where i got that boost bottle post but everyone here thinks hes an idiot.

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. 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. The gas temperature effects the speed of sound within the pipe, and in turn the time it takes for the sonic pressure waves that we are trying to harness to valve the exhaust port and create suction to drive scavenging the point of the pipe. Sep 30, 2012 hi performance two stroke porting software program diospeeddemon. For port work, one company that will help you is 2strokeporting. Two stroke design software the following are spreadsheets for different aspects of 2 stroke designmodification. You should only rely on the experience of the very best. As far as removing the casting marks, i dont see an issue. But because of the limited worldwide activity in two stroke engine development, program sales were limited and further development was curtailed.

Calculates port heights from durations, or durations from port heights. Millions of fluid and thermodynamic calculations are made by mota representing the conditions inside your two stroke engine throughout its complete operating cycle. It seems that progress is slow among 2 stroke software developers and that accurate data taken from a cylinder is not put to its best use. This software is classified as a two cycle wave action simulator it will visually display the wave activity of a running two stroke engine. Oct 17, 2017 tips on how to port a two stroke cylinder, what to donot do and how to do it right. This can easily ruin your eninge, but can also increase performance by alot. Compared to macdizzy s two stroke technology exchange, r. Feb 08, 20 well i have been reminded lately that this is a dirtbike forum where i can ask questions so i figured id give it a shot. Two stroke engine technology database, large two stroke engine building porting section. 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. Banshee stroke porting wisdom 4 ya banshee repairs and. We shall send you a pdf document with the templates for manufacturing your exhaust. 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.

Those of us who have grown up in the japanese two stroke. Schnuerle porting is a system to improve efficiency of a valveless twostroke engine by giving better scavenging. Software for fine tuning and design of two stroke engine. Bigger carburetors, higher compression ratios, altered port timings and expansion. Considering that a 2 stroke motor delivers all of its power in about 85 to 95 degrees of crank duration as compared to a 4 stroke where there is almost a complete stroke to accomplish this. With 2 stroke engine modification, porting and polishing is the ultimate choice. Its very much a system, and all parts have to be understood before consistent improvements can be made. A critical parameter in two stroke pipe design is the gas temperature within the pipe. There are different phases taking place in the crankcase and in the cylinder bore at the same time. There are two ways to decrease the duration of the exhaust port, one is to weld up the top of the port so that the piston uncovers it later in the stroke, the other is to machine a little off the bottom of the cylinder so that it drops the whole cylinder exhaust and transfer port in relation to the piston. Heres how shaving off miniscule ammounts of metal can drastically improve your speed. Software for fine tuning and design of two stroke engine by. I only have a dremel and was wondering if i could do anything at all myself to my yz125 before i put it together.

Other than macdizzy s site and camatv on banshee hq, nobody talks about their work. These modifications can be extremely effective when used in the right combinations. Whether you want more power, torque, or both, i can help. Thermaldynamics is a private company that was founded in ontario, california in 1957. Test your own theories on porting and exhaust pipe design. Unlocking the secrets of 2 stroke porting, part 2 how to trace and.

Youd be doing well to find this much info about 2 stroke porting in any amount of time. Our many years of 2 stroke engine tuning includes our never ending work in performance cylinder modifications. However, you shouldnt just pick any business that you can find anywhere. I would really like to see some new two stroke porting books. Moreover you can have advices for the development of the engine thanks to the help of tested formulas for intake, exhaust. 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. Cc specialty tools porting and polishing for 2 stroke engines. 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. Professional grade 2 stroke porting and polishing kit includes. Tips on how to port a two stroke cylinder, what to donot do and how to do it right. 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.

Everything2stroke forum since 2004 a forum community dedicated to all 2 stroke engine vehicle owners and enthusiasts. So whether you have a 50cc road bike, a 500cc motocrosser or a classic racer. Diy cr250 engine porting honda 2 stroke thumpertalk. 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 2 stroke tuner lufo racing, this software is directed for all 2 stroke. If you have two identical cylinders, id be interested in polishing one, and leaving the other stock and see what kind of instant differences you notice. Each intake port can be locked to a fixed timing relation with the exhaust port. Efficiency, velocity, trajectory all play a role, and there is no way to get this right without the proper porting tools.

Graham bell is an acknowledged expert on engine tuning, with many years experience in this field. The engmod software was developed by neels van niekerk, who may well be a macdizzy member. 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. 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. This page was created to educate others on the benefits of two stroke porting. Our goal is to achieve the biggest power gains as possible, while maintaining reliability on your 2stroke engine. Four strokes porting these days is mostly just blueprinting, clean up work and small subtle changes to the ports that tend to go unnoticed to the average person looking at the port. The larger valve area with a wide area would be very beneficial to squeeze strength at high rpm. Two stroke cylinder porting tips watch this before you start cutting. 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. Enthusiasts, tuners, mechanics, gp, drag racing, mx, enduro.

Everything you need to know about the twostroke cylinder. A dremel is for wood working or engraving your favorite paper weight, but not for porting and polishing on a 2 stroke. I wanted to just enter the actual port area as measured but there is no way to do it. Additionally when the exhaust port is raised the effective power stroke is reduced. Oct 04, 2011 changing the power of 2 stroke engine is really very simple when you know the basic techniques of 2 stroke engines. Scavenging ports optimal design of a twostroke small. You should read about how the two stroke enigne works before you attempt this. Macdizzys two stroke technology exchange competitors.