4 stroke porting software

The newest info i have is the two stroke tuners handbook by gordon jennings. Bigger carburetors, higher compression ratios, altered port timings and expansion. Calculate your exhaust port duration given a certain stroke, connectingrod length, distance to cylinder top and also deck. Eric gorr racing offers allinclusive porting packages for all types of 2stroke and. Kick ass and take names with this baby software located on the web at this address. 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 two stroke screamer, not make a boat anchor out of your cylinder. In motocross its usually a compromise between best peak hp and good early off the pipe power.

The license only admits the registred owner to use the software. A slightly rough intake finish helps with atomization, polish your exhaust side. Two stroke cylinder porting tips watch this before you start cutting. Using our flow bench, dynomometer, and advanced computer simulation software along with hard work and testing, we offer industry leading performance. In general, it is possible to increase the trapping efficiency by about 4% at the engine. Eric is well trained in the use of the latest software programs that the. You should only rely on the experience of the very best.

Our services include high flow carb mods, highperformance camstiming, high compression pistons, cylinder machining, high flow head porting of the intake and exhaust cavaties for maximum flow. I use a snapon burr set 1 4 ball tipped cylinder, 12 ball, 12 to 1 4 taper are my 3 favorite carbides. In addition to all the considerations given to a fourstroke engine port. Everything you need to know about the twostroke cylinder. Four stroke porting and performance finding reliable, quality power you can feel on modern four strokes is very challenging. Scavenging ports optimal design of a twostroke small. Effect of ports configuration on trapping efficiency of a twostroke. If you are aiming for these qualities, modifying your 2 stroke engine is a great strategy. Our cnc ported head services are perfect additions to our bigbore kits. Software for fine tuning and design of two stroke engine. We use mathmatical calculations based on your engine come up with the required air flow. All dri 4stroke head porting includes valve seat machining serdi. Since modifying the 2 stroke engines require not only a big.

Precision high performance porting for any outboard. Engine geometry is modeled using commercial proe software. Kinda like f3 porting on a full mod 94 zr 700 that couldnt catch a 95. Typically when a new engine is designed the port characteristics are.

Has any one done any kind of porting or polishing to a 2 stroke cylinder themselves. Changing the power of 2 stroke engine is really very simple when you know the basic techniques of 2 stroke engines. We specialize in optimizing flow characteristics of your 4 stroke head. An engine port is an open window in the cylinder wall for the intake or exhaust of fuel mixture airgas. Cylinder head porting can make dramatic results on your 4 stroke machine. Assign fixed relationships between transfers and exhaust port. Two stroke marine outboard applications impose several uniquely individual circumstances that are very different from other two stroke engine uses. If you keep your compression high and do not go crazy on your exhaust timing, you can get plenty of torque out of a. Exhaust and intake tuning building, tips and techniques. From the analysis of results, it is found that, increasing exhaust port area relative to total. The trend in high performance two strokes has continued towards more case volume, however each engine and application differ.

But because of the limited worldwide activity in twostroke engine development, program sales were limited and further development was curtailed. I only have a dremel and was wondering if i could do anything at all myself to my yz125 before i put it together. How to make portmaps, find port duration, port corner radius, port flow width, and port height, heres a great tool for converting piston travel. Different from conventional fourstroke engines equipped with. Guides are removed for head porting most models guides are modified or replaced with upgraded design most models. Our goal is to achieve the biggest power gains as possible, while maintaining reliability on your 2 stroke engine.

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. Porting tool ah9018332pt works great on most 100cc engines and larger. The businesses and individuals that purchased the original dynomation 2 stroke program were pleased with the capability and accuracy of the software. Purchase the porting tools you need at our online store.

Proscons of head porting 4strokes general dirt bike. We use computer design software to maximize power and torque at any elevation. Through our partnerships with the best builders in the country, we are able to provide fully developed cnc ported cylinder head services to our retail and dealer. Cylinder head porting refers to the process of modifying the intake and exhaust ports of an. However, you shouldnt just pick any business that you can find anywhere. 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. Harris performance engineering hp race development. Porting goes hand and hand with high performance camshafts. 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. The combination of cnc and cam software give the porter full control over. Porting 4stroke cnc head porting through our partnerships with the best builders in the country, we are able to provide fully developed cnc ported cylinder head services to our retail and dealer customers. Dynomatontwostroke is a dosbased simulation that was originally released. I contacted them and, indeed, they provide the services for the ttr230 as do other outfits. Seriously, i asked the question because i had never transported a 4 stroke and didnt know if the recommended positioning actually worked ok under all circumstances.

In order to obtain proper comparison data, two engines were simulated in gt power software. This handpiece extends telescopically, adding an extra 3. Add a left hand cut burr for contraangles on port windows. The term is used interchangeably when referring to the changes made to hardware when it has to be made compatible with other environments. This allows the negative exhaust pulse the reflection of the positive pulse to actually pull more fresh mixture past the intake valve and into the cylinder. 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. For port work, one company that will help you is 2 strokeporting. The computer allows us to compare the variables with existing. 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.

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. Port matching, porting and trenching twostroke engine cases. Thank you for the lesson on two stroke nomenclature. Prc precision racing components offers head porting and claims they do not port in stages, each and every head is ported to maximim prc race specs. Those of us who have grown up in the japanese two stroke. Hi performance two stroke porting software program youtube. Racingsm software for 2 stroke development, also for 4 strokes in some modules, create 2t exhaust, create 2 stroke exhaust. We will make your cylinder head flow propperly at the propper lift points. There is one or more forwardlocated exhaust ports, two or more side transfer ports, and one rear intake port. Porting is the process of adapting software in an environment for which it was not originally written or intended to execute in. For the future info seekers who stumble onto this thread.

Each part of the 2stroke cycle can be evaluated and designed with computer software programs. The 421 system gives good allround power, with no special power peaks or dips, while a 41 system give the best power at higher revs. Moreover you can have advices for the development of the engine thanks to the help of tested formulas for intake, exhaust. Kb5 4 stroke mods kb5 offers custom cams, pistons and performance valve train parts. Whether youre into racing motocross or recreational dirtbikes, for maximum performance, 2 stroke cylinder and 4 stroke head porting from richs taylord porting puts the power in powersports. Port timing of typical piston ported two stoke engine a, and valve.

Determine the level of porting you wish to achieve before you start cutting or grinding. 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. The old adage of stuffing cases on every project just isnt true any more. Each intake port can be locked to a fixed timing relation with the exhaust port. The official home page of our 2 stroke wizard tuned pipe. We work on porting to achive the best results for you and your applicaton. Twostroke waveaction engine simulation motion software. Great book, but ill guess the world has moved past that info. 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. For road, youll be best off with a 421 system on a four cylinder engine. How to tips from tj on porting and polishing 2 strokes.

Specialty tools for porting 2 stroke, 4 stroke, cylinders, cylinder heads, 2 stroke case porting, and intakes. Port match if necessary, smooth out your short side radii, keep your intake finish smooth, but not polished. Dynomationtwostroke engine simulation motion software, inc. On a 4stroke, the intake valve begins to open while the exhaust valve is still off its seat. Calculates port heights from durations, or durations from port heights. Two stroke engine and exhaust design software north. Subsequently, the meshing process is implemented using avl fire software. All 4stoke parts and valve seat work is done inhouse by master technicians.