For manufacter and tuner of two stroke engine, ntproject has developed a series of software to help in the development of the engine and its components. Engine tuning for radio controlled planes will ensure proper acceleration and keep top speed without harm the engine. When engine starts, move throttle to 1 2 throttle and then remove glow driver. This works just fine but misses out on the additional push we could get from the engine by tuning the exhaust. At the moment, we have a special 2 stroke bike collection. An engine simulation software, ricardo wave, is utilized in this research. The most common mistake is to choose the wrong combination of engine components, making the engine run worse than stock. Twostroke waveaction engine simulation motion software. Ngh have become known for building quality gas engines that offer light weight, power and reliability at a very affordable price. 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. Properly tuned systems can increase the charge of fuel delivered to the cylinders and a related phenomenon can aid.
A myriad of different aftermarket accessories is available for you to custom tune your bike to better suit your needs. Our detail and craftsmanship of our work goes far beyond most in the industry. 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. You could create a hardcopy of the program window, though, using your. The af gauge utilizes a lambda sensor that is inserted into the center of the exhaust stream, approximately six inches from the piston in the header pipe of a four stroke and in the baffle cone of a two stroke engine. The most affordable 2 stroke engines for nitro powered rc planes. For port work, one company that will help you is 2strokeporting. Australian dollars including gst and delivery within australia or exported to most countries. The 4 stroke ignition system fires on every second stroke so in theory the 4 stroke is not as powerful as a same size 2 stroke. The way a two stroke motor works causes them to be f. Cold rolled sheet metal i used 18 gaugelots of welding rod i used a 110v wire feed welderrubber stoppers for isolation.
Yes, i use the same mix in both two and four cycle engines, always with some castor in the blend. The official home page of our 2 stroke wizard tuned pipe. Novarossi engine motoren 2,1cc 3,5cc 4,22cc rcspecialist. Neal smith, the nitro shop, winnipeg, canada, using datamite mini on their rc inertia.
In the model tuning tips chapters of this book, all the. The high performance 2 stroke engine is a pulse resonance engine which means that the operation in general and the scavenging in particular is not only. There are many ways to boost the power, one of which is by installing a tuned pipe. The engines will not bog down with these props, they just wont quite develop all the power they could. This software enables you to modify the zenoah and cy sikk engines and as well as others by following the step by step instructions and illustrations. To understand how to tune your engine for best performance, it helps to first understand the function of the carburetor. The trend in high performance two strokes has continued towards more case volume, however each engine and application differ. Millions of fluid and thermodynamic calculations are made by mota representing the conditions inside your two stroke engine throughout its complete operating cycle. Richen it about an 18th of a turn until the engine starts at a low throttle 15 throttle setting. Neat little 2stroke transfer porting drillpress machining. Xipp engine tuning method salsa petrol gas engine tuning carbs arent too difficult to tune up if you know what youre doing. 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.
Two stroke performance tuning two stroke all of these detonation triggers are virtually unavoidable, with the exception of excessive spark lead. Often youve been forced to use the reed petals proposals on the market, without being able to take significant action. We shall send you a pdf document with the templates for manufacturing your exhaust. Bbr tuning 49cc 5g pull start bicycle engine kit 4. Two stroke engines have lower velocity so the needle jet has a halfmoon shaped hood protruding into the venturi to produce a low pressure area that aids in drawing the fuel up through the needle jet. Two stroke motors are very touchy in the tuning process, if they run too rich, they bog down and quit. Oil in the exhaust is normal and necessary for long life for a 2stroke engine. This is a compilation of technical papers created over the past 12 years dealing with many technical rc nitro engine topics. Thought i would transfer this over from tha cirkus rip. Mobile raspberry pi remote control reuse robots sensors software. Figure 2 shows the complete 1d engine schematic modelled in ricardo wave.
It is a couple of articals that xipp wrote in response to my engine tuning question that got a great response from the rc community. A little bit of background information on scott schneider. The analysis is conducted on a 1d model of a ktm 510 cc single cylinder, fourstroke sl engine. 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. This month i will discuss the basic setup and tuning of two stroke glow engines without a fuel pump, still by far the most commonly used engines in our models. Whether you need glow or gas, 2 cycle or 4cycle, single cylinder or multicylinder, horizon has an engine to suit your needs. We also manufacture and modify numerous components for the large scale model car market including engine ecu system, clutches, diffs, radio trays, servos.
My thanks to both of you for giving me a tool to tune tally investment. Those of us who have grown up in the japanese two stroke. If you are aiming for these qualities, modifying your 2stroke engine is a great strategy. I always had problems with my rc car traxxis tmaxx, went through 5 carbs and 4 motors. Software for optimal setting and design of engines and racing. Tuning 2 and 4 cycle glow engines may 15, 2008 tuning any glow engine for peak performance is a relatively simple process, but is made more difficult for the typical novice rc flyer because of a lack of knowledge of carburetor basics and engine instructions that leave a lot to be desired. This is the kind of engine and carburetor we will be referring to in this article and the tuning techniques presented.
Flmlf 29cc gas engine 2 stroke gasoline engine motor for 15 hpi baja lois 5ivet dbxl fg goped redcat car. 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. Expand your options of fun home activities with the largest online selection at. Improve the performance of your two stroke engine with a torqsoft designed exhaust system. Here are some useful tips for tuning your gas engine. A rc 2 stroke is just like any other 2 stroke engine when it comes to tuning only they tend to be a lot more cranky. We have the optimum case modifications to suit each application and engine developed over countless hours.
We are known for our work with 2 stroke engines, tuning them for many different applications including large scale model cars, helicopters, aeroplanes, boats, scooters and goped markets. The diameter and length of the five main sections of a pipe, are critical to producing the desired power band. Mount an old piston to the table of a drillpress and using a carbide cutting bit, you can shave off. Software for optimal setting and design of engines and. The 500 cc 2 stroke racing motorcycles that used to be. 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. Modify your own 2 stroke engine for more power and torque with our 2 stroke modified rc engine program.
The physics of a 2 stroke engine is very complex compared to that of a 4 stroke when we are trying to optimize horsepower, reliability, and reasonable width of the power band. In a four stroke engine, there is only one working stroke against three negative strokes induction, compression, and discharge. Bigger carburetors, higher compression ratios, altered port timings and expansion. 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. For manufacter and tuner of two stroke engine, ntproject has developed a series of software to help in the development of the engine and its components from the bellmouth of the carburetor, to the insert of the reed valve and the reed petals, at the studied of the cylinder ports, until to the balance of the crankshaft, thanks at our software you could optimize your engine and to develop new. The worlds leading 2stroke engine simulation software available readytorun on your pc, at only. Changes in fuel type, or in wear as the engine breaks in, may also call for re tuning. There are two versions of the program, so choose which is best for you. Researchers have found that it is the gases at the very outer limits of the combustion chamber, called the end gases, that selfignite to cause detonation. Engine displacement question 2 stroke vs 4 stroke rc groups. Great deals on 2 stroke engine hobby rc gasnitro engines. In the 2 stroke 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. When the rpms remain the same for several minutes the engine is likely broken in. Building a strong reliable engine is always the result of much trial and error, and the information posted here is simply to give you ideas.
Return the needle valve to 2 turns out from closed. Mar 02, 2009 the gauge displays af ratios from 1016. Two stroke cylinder porting tips watch this before you start cutting. We offer exactly what we race no matter who gets them. Modify your own 2 stroke engine for more power and to rque with our 2 stroke modified rc engine program. This is a modified tube on the front of the engine. The difference between a two stroke and four stroke engine is intake velocity. Too often, i see newcomers to our hobby ask online how many turns do i set my needle valves, or i messed up the factory setting, how do i setup my low end needle so i can start my engine. Two stroke motors are more efficient that four strokes for a few reasons. It is a fact however that these techniques would apply to many other types and brands of 2 stroke engines and carburetors.
If engine wont start, try more throttle until it does. As with any 4 stroke the rc airplane 4 stroke has pushrods, rocker arms and valves. Performance trends features engine simulation software as well as data. This is the area of the racing hobby that i am most interested in and compete in. If engine will only start above 1 2 throttle, it means your initial low end needle setting was too lean. But youll need to get a glow plug that suits the type of engine you are using but also the fuel. The five sections of the pipe are the head pipe, diffuser cone, dwell, baffle cone, and the stinger. The majority of classic 2 strokes have ignition systems that fall into one of two types. All tools and parts are in the house to do full service, tuning or rebuilding your zenoah engine. However, you shouldnt just pick any business that you can find anywhere.
From the bellmouth of the carburetor, to the insert of the reed valve and the reed petals, at the studied of the cylinder ports, until to the balance of the crankshaft, thanks at our software you could optimize your engine and to develop new. If engine will only start above 12 throttle, it means your initial low end needle. Scott has been working with and tuning 2 stroke engines for 25 years. Until very recently i had no idea how to do this and while im still no expert, the understanding is coming. Software zenoah modified engines by performance unlimited. Exhaust tuning of an internal combustion engine by the combined. 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.
We at performance unlimited are racers ourselves and know what it takes to make a reliable and very powerful zenoah modified rc engine as well as professionally built hulls that are above the standard of other manufactures. So whether you have a 50cc road bike, a 500cc motocrosser or a classic racer. Exhaust pipe the exhaust pipe of a twostroke engine attempts to harness the energy of the pressure waves from combustion. Ngh gt9 pro 9cc twostroke engine nghgt9pro motion rc. The 2 stroke engine cycle the characteristic feature of the two stroke engine is its means of operation. Basic 2stroke engine tuning information joe hunt rc. The exhaust pipe of a twostroke engine attempts to harness the energy of the pressure waves from combustion. The businesses and individuals that purchased the original dynomation 2 stroke program were pleased with the capability and accuracy of the software. They are so simple and fun that ive always enjoyed tinkering with them. Computer design software is used to calculate the msv for head designs. Here are some great tips to make you an expert engine tuner. The five sections of the pipe are the head pipe, diffuser cone, dwell.
We believe that using this software will help your 2 stroke development or racing results on different types of competition. Sep, 2016 engine displacement question 2 stroke vs 4 stroke why is there such a big difference in horse power between 4 stroke and two stroke engines. Since step and iges format files will work many kinds of software autocad, inventor, solidworks, solidedge. Oct 24, 2017 10 ways to gain power in a 2 stroke engine for free. Ic engines for free flight, control line and rc models. Mount an old piston to the table of a drillpress and using a carbide cutting bit, you can shave off some of the bridgeportjust be sure to knife the. How to restore an old rc nitro engine for the glass showcase duration. Gt9 pro 9cc two stroke engine from ngh nghgt9pro here at motion rc we are pleased to present our customers with the ngh line of gas engines.
In reality, development of the modern 4 stroke has increased the power output to high levels, closing the power gap between 2 and 4 stroke rc plane engines. The 4 stroke glow engine shares many similar features to the 2 stroke with the obvious exception of the valve design. In motocross its usually a compromise between best peak hp and good early off the pipe power. In a two stroke engine, every stroke leaving top dead center is an expansion stroke i. 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. But because of the limited worldwide activity in two stroke engine development, program sales were limited and further development was curtailed.
The faliure of the 50 mph trike was most likely not caused by wear and tear on the engine, or even damaged parts, but by a simple mistake in the tuning process. Oil in the exhaust is normal and necessary for long life for a 2 stroke engine. You should only rely on the experience of the very best. Basic 2 stroke tuning changing the power band of your dirt bike engine is simple when you know the basics. Along with the engine technical papers are also an assortment of articles with interest to rc nitro model boaters. It would be fair to say that these recommended props are often much larger than those typically used in the usa but this helps significantly with noise reduction and therefore we will go with a larger prop.
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