2 stroke sport timing software

Initially the application has been used for the last few years in our existing company for manual backups in addition to our electronic timing systems. These modifications can be extremely effective when used in the right combinations. Determine the level of porting you wish to achieve before you start cutting or grinding. Tool kits free delivery possible on eligible purchases. New version of 2t exhaust calculator it is a freeware 2 stroke expansion chamber exhaust calculator program download at. With 2 stroke engine modification, porting and polishing is the ultimate choice. Software for fine tuning and design of two stroke engine. Duration degrees after entering the stroke and rod length, select either field to calculate.

International sports timing scoreboards and timing equipment. Timing belt kits free delivery possible on eligible purchases. Note that you do not require a paypal account as you can use your credit card. A taller port restored lost power but made the power band unacceptably narrow. What is the significance of port timing diagram in 2.

Valve timing is the regulation of the points in the cycle at which the valves are set to open and close. I have a 1996 sportsman 400 4x4 2 stroke and am having issues with it overheating in warmer weather. On a twostroke engine, an expansion chamber or tuned pipe is a tuned exhaust system used to enhance its power output by improving its volumetric efficiency. 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. 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. An 850 cc version was available in the 1966 saab sport a standard trim. Cc specialty tools porting and polishing for 2 stroke engines. I am not the original owner and cannot find a reliable place to get an owners manual to look over the parts. This will get you started by providing, for your engine, the dimensions of an expansion chamber with a 2 stage or 3stage diffuser. An engine port is an open window in the cylinder wall for the intake or exhaust of fuel mixture airgas. This will increase the mid range hit as the pressure in the cylinder will rise quicker. In the ideal cycle inlet and exhaust valves open and close at dead centres, but in actual cycles they open or close before or after dead centres as explained below.

For port work, one company that will help you is 2 stroke porting. The idea is to get an education in cause and effect. We use computer design software to maximize power and torque at any elevation. Kits are available in multiple piston oversizes, depending on what your machine shop recommends. The way a two stroke motor works causes them to be f. It is evident that the down stroke angle is 90 deg atdc but the up stroke angle is 272. Allows inspection and adjustment of ignition timing. Oct 04, 2011 changing the power of 2 stroke engine is really very simple when you know the basic techniques of 2 stroke engines. The figure below shows the output screen for the same engine parameters, but this time calculating the angle given a piston position of 27. Algetiming is the undisputed market leader in timing devices for alpine skiing. Mylaps timing systems are renowned for the high quality and used. If you are aiming for these qualities, modifying your 2 stroke engine is a great strategy. And, if you advance the timing too much in a 2 stroke or a 4 stroke engine you raise the cylinder pressure too early, reducing the peak rpm, but enhancing the midrange, making the engine pull harder at.

Eventmanager consists of different modules that cover each aspect of the event cycle. One field must have a value to calculate the other. With symmetric timing, the transfer port opens after the exhaust port and closes before the exhaust port. Software for optimal setting and design of engines and. Since a 2 stroke has combustion once every crank cycle whereas the 4 stroke combusts once every 2 cycles then the pistons top temperature can get high enough to melt it at high engine revolutions with the timing advance equal to that of a 4 stroke engine.

The advantage of a rotary valve is that it enables the two stroke engines intake timing to be asymmetrical, which is not possible with pistonport type engines. Two cycle engine port timing calculator csgnetwork. You should only rely on the experience of the very best. Timing systems for all types of sports overview mylaps sports. For the kart world, ntproject has developed a series of software fundmentals to obtain the optimal setting of the kart on track. Twostroke waveaction engine simulation motion software. Ive been using this software for about 3 weeks now, and i think its pretty good. Squish is an effect in internal combustion engines which creates sudden turbulence of the fuelair mixture as the piston approaches top dead center tdc. Mota software, 2 stroke engine simulation software, 2 stroke exhaust design. Two stroke moped tuning two stroke timing moped tuning.

Page 1 of 3 asymmetric timing in the two stroke engines posted in the technical forum. Exhaust and main transfer timing can be entered by mouse click on graph, or typed in. Actual valve timing of four stroke petrol spark ignition engine. Improvement of fuel consumption with variable exhaust port. 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. The pistonport type engines intake timing opens and closes before and after top dead center at the same crank angle, making it symmetrical, whereas the rotary valve allows the. Kits are available for most makes and models of motorcycles fitted with ecus. In a 2 stroke, we want to maximize the retention of that finite fuel charge. The pistonport type engines intake timing opens and closes before and after top. Valve timing diagram for ic 2 stroke and 4 stroke petrol. 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.

They are so simple and fun that ive always enjoyed tinkering with them. Recmar timing belt for yamaha outboard 4stroke 6p24624102. Exhaust and main transfer timing can be entered by mouse click on graph, or typed. With 4 stroke engines, porting, when performed correctly and with the right tools, will result in positive horsepower gains, along with increased fuel efficiency and a smoother running engine. Many things will affect the power delivery of twostroke motorcycle engines. I fear some modded saws out there with stock ignition timing are knock limited as it comes to powertorque delivery. Changing the power of 2stroke engine is really very simple when you know the basic techniques of 2 stroke engines. Kit includes a dial indicator with extensions and a 14 mm spark plug thread adapter. One may think that a change in valve timing would do wonders for a four stroke s power, but getting a camshaft made to order costs hundreds of dollars. Pipes, silencers, carburetors, reeds and valves are all popular bolton modifications. Includes dial indicator with extensions and a 14mm spark plug thread adapter.

It requires values for stroke, piston height, conrod length, and wrist pin offset. There are many ways to boost the power, one of which is by installing a tuned pipe. A narrow port reduced power but improved reliability. Moreover you can have advices for the development of the engine thanks to the help of tested formulas for intake, exhaust, blowdown and transfer. Time is required to pass from the opening of the exhaust port till the opening of the transfer port translated into. Two stroke tuners handbook 2 another mistake commonly made, sometimes. Here are some useful resources with several 2 stroke porting theories and.

Advancing the timing will make the spark fire earlier. Do you have any recommended readings on tuning of 2 stroke engines. 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. We cant afford to waste any of it by having it escape out the exhaust port this is not a concern in the 4 stroke because the intake flow of fresh mixture is unlimited, or at least limited only by the duration of the intake valve timing. Induction types catered for are crankshaft induction, drum valve, normal disc valve and zimmerman disc valve. How exhaust port timing affects two stroke performance. International sports timing offers the best scoreboards and timing equipment around.

The official home page of our 2 stroke wizard tuned pipe. I had a bad cdi that the advance was way off and the bike ran like crap even after doing a dial gauge setting. Mota for windows slide show of features millions of tuning variations possible. Two stroke engine and exhaust design software post by gerrit. We also have a simple 2stroke expansion chamber design program. Ignition timing can be varied, and curves accepted. However, the top end performance will suffer some as a result. After entering the stroke and rod length, select either field to calculate. This expansion chamber is not the product of simple correlations as for other products that abound on the web, but an automatic design created by mota which is a full wave action 2 stroke engine simulator. Buy motion pro timing kit for 2 stroke watercooled engines 080250. As you probably know, in four stroke engines, you advance the timing that is, it happens before the tdc to impulse the piston at the right moment.

Has anyone ever herd of or tried a two stroke simulation software called engmod2t. Entering a value will produce inlet timing figures. From the jetting, to the ignition timing, for the engine setup, from the tyres pressure, at the balance and adjustments, for the chassis setup, until to the choice of the transmission ratio, and the brake balance, every aspect is cured to allow you to get the best. Once a source of stymied lust in the united states, the 250cc twostroke streetbike has come of age, and a new era dawns.

Purchase the porting tools you need at our online store. How to tips from tj on porting and polishing 2 strokes. The kit does work on yamaha rd two stroke twins with engine out of frame. I am yet to check my saws stock ignition advance, but i reckon itll be more than 2 stroke motorcycle engines with tuned pipes.

The exhaust designer programme enables the user to design a two stroke exhaust system with ease, then with one click of the mouse, create a pdf document in any of the common paper sizes a4, a3, letter. To draw the port timing diagram of given two stroke cycle petrol engine. I can ride for about an hour and the light come on. Buy recmar timing belt for yamaha outboard 4 stroke 6p24624102. Exhaust and intake tuning building, tips and techniques. There is one or more forwardlocated exhaust ports, two or more side transfer ports, and one rear intake port. Two stroke engine and exhaust design software north. We offer various timing systems for races as well as trainings. Finally, enter the exhaust duration of 184deg and the peak power speed of 12500 revsmin and click the design now button.

Two stroke design software the following are spreadsheets for different aspects of 2 stroke designmodification. A twostroke or twocycle engine is a type of internal combustion engine which completes a. Softengine engine simulation software 2tbase seven software. 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 port work, one company that will help you is 2stroke porting. I might tune 2 stroke engines in the not so near futurea year from now, maybe. Simplest way to measure exhaust port timing on a two stroke engine duration. Due to limited space between the cylinder head and upper frame rails, the two stroke timing kit with adapter kit does not fit on yamaha rd two stroke twins with the engine installed in the frame. There are different phases taking place in the crankcase and in the cylinder bore at the same time. The oncebanned 250cc twostroke sportbike enters a new. Some kits have the advantage of having realtime displays or recording capabilities to enable the owner or mechanic to make adjustments that ensure the correct fuel ratio matches the ignition timing and that both remain inside the safe operating parameters of the engine. Free also means unsupported, so if you need more advanced features youll need to consider upgrading to a professional package. But because of the limited worldwide activity in two stroke engine development, program sales were limited and further development was curtailed. Other than the tsr boostbottle dos application and the iwt racing freeware pipedesign utility, i havent tried any of the other software packages out there, but since this one came highly recommended and had a good.

Torqsoft twostroke exhaust system designer programme. 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 already have some plans for an inertial dyno and was looking for pressure sensors which could be put inside a 2 stroke exhaust. Hi guys, does anybody know why 2stroke ignition advance curves are opposite to 4 stroke. Later, its possible to input the timing the ports phases and durations, and.

The majority of classic 2strokes have ignition systems that fall into one of two types. Hi performance two stroke porting software program youtube. The measurement required is the vertical distance from the crankshaft axis to the bottom edge of the inlet port. Enthusiasts, tuners, mechanics, gp, drag racing, mx, enduro.

Those of us who have grown up in the japanese two stroke. North american twostrokes 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. 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. Enables all transfer port heights to be calculated automatically by just entering exhaust timing. Many things will affect the power delivery of two stroke motorcycle engines. Aug 17, 2017 how to use a dial gauge to adjust the timing points on a vintage yamaha 2 stroke see description. And, if you advance the timing too much in a 2 stroke or a 4 stroke engine you raise the cylinder pressure too early, reducing the peak rpm, but enhancing the.

In the case of two stroke cycle engines the inlet and exhaust valves are not present. Each intake port can be locked to a fixed timing relation with the exhaust port. Next enter the cylinder bore and stroke which are 40. If no critical damage is found, we can supply rebuild kits to bring it back to life. Since modifying the 2 stroke engines require not only a big. This website and app will help you tune your moped or any two stroke engine. Two stroke performance tuning back in europe twostroke engineers were battling excessive ring and cylinder wear, due to the exhaust port width being too great. We also have a simple 2 stroke expansion chamber design program. Two systems are in use, lowpressure airassisted injection, and high.