4 stroke engine porting software

With my porting, head modifications, and pipe i am able to make 110. In other words, the engine will, after tuning, produce more power from the same displacement. Support for windows not only makes the program easier to use, but it also allows. We believe that using this software will help your 2 stroke development or racing results on different types of competition. But because of the limited worldwide activity in two stroke engine development, program sales were limited and further development was curtailed.

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. Blair of queens university belfast, and published by the society of automotive engineers. Thats over a 50% increase in horsepower and 11 ftlbs more torque. Unlike on a twostroke, fourstroke porting is done in the head. If you are looking for a cam for your machine, we can find you one to go with our porting. However, you shouldnt just pick any business that you can find anywhere. A stroke refers to the full travel of the piston along the cylinder, in either direction. Kinda like f3 porting on a full mod 94 zr 700 that couldnt catch a 95 efi zr580 on ufa purple. Rk tek uses the latest in 2 stroke design and simulation software, coupled with, practical knowledge that can only be gained through experience and trial and error, to properly modify any engine. Assign fixed relationships between transfers and exhaust port. The complete engine geometry together with these two exhaust systems is simulated using an engine simulation software package virtual 4.

Jul 28, 2006 what exactly is done when porting a 4 stroke same as a 2 stroke. Cylinder head porting refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve quantity of the air flow. Scavenging ports optimal design of a twostroke small. Feb 16, 2017 two stroke cylinder porting tips watch this before you start cutting. 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. Doing the finishing touches on the spx cylinder and wanted to give you a quick tour of my porting setup. Proscons of head porting 4strokes general dirt bike. For example, a cc engine may produce 125 hp in stock form and 175 hp after race tuning.

Mar 27, 2010 i have just got my son an old 1985 xr 250. Two stroke engine and exhaust design software north. You should only rely on the experience of the very best. Part of the problem is understanding the pulse or charge nature of the airflow in a 2stroke engine. If you are aiming for these qualities, modifying your 2stroke engine is a great.

The other is how air density barometric pressure, temp, humidity, and elevation change, affects horsepower. The objective of tuning is to improve the volumetric efficiency of the engine. May 07, 2018 i made this video long ago, but forgot to upload it. While two stroke engine development is on the rise again, the worldwide interest in a professional two stroke engine simulation is still limited. The ttr230 is aircooled does the porting increase the likelihood of overheatingseizure. The first 3 videos will cover simple mapping of the. Heres how shaving off miniscule ammounts of metal can drastically improve your speed. We know more power is good, but creating rideable, reliable horsepower that you can make the most of is the key to faster lap times. Twostroke waveaction engine simulation motion software, inc. An engine port is an open window in the cylinder wall for the intake or exhaust of fuel mixture airgas. Optimization of exhaustpipe tuning on a 4stroke engine using. Those of us who have grown up in the japanese two stroke. Engine performance simulation software has become an integral part of the engine designers toolkit. A four stroke also fourcycle engine is an internal combustion ic engine in which the piston completes four separate strokes while turning the crankshaft.

Racingsm software has some specific modules that can help tunersbuilders on their race engines bikes in order to improve performance and reduce lap times. These bikes has been known to punch out big hp with twin carbs and exhaust. Merakit mesin rx king full porting harian duration. To properly port the head on a fourstroke requires an understanding of. I have over 38 years experience working with some of the best 2 stroke engineers in the world. We use computer design software to maximize power and torque at any elevation. Simple twostroke cylinder porting tutorial youtube. Our cnc ported head services are perfect additions to our bigbore kits. Each intake port can be locked to a fixed timing relation with the exhaust port. In most cases, the connecting rod is shortened the same distance that the big end bearing is moved. Careful care must be taken to assure that engine will not end up making less power then it did before the engine porting was done. The way i see it correct me if i am wrong the 4 stroke wouldnt loose bottom end by porting alone until you change cam profile and timing to which need to do to get the most out of your porting and to achive 170 hp which would then ruin driveability.

Mar 16, 2012 to stroke an engine, a tuner relocates the bigend bearing further outboard on the crank halves. If you are aiming for these qualities, modifying your 2 stroke engine is a great strategy. Head porting and valve seat service tbt racing engine modifications improve lowend, topend and just make the bike pull harder from idle to the rev limiter. Best cylinder porting, engine porting, 2stroke porting, 4. For road, youll be best off with a 4 21 system on a four cylinder engine. Cylinder heads, as manufactured, are usually suboptimal for racing. 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. The combination of cnc and cam software give the porter full control over the port shape and. We believe that using this software will help your 2stroke development or racing results on different types of competition. Porting and polishing two stroke motorcycle engines.

Port matching, porting and trenching two stroke engine cases duration. Crankcase and cylinder porting is probably the most controversial subject among performance 2 stroke engine builders. I know the less exhaust pipe curves the better and where it does curve try and make them long and flowing. The cutaway of the cylinder shown details the port arrangement and. In contrast, a two stroke engine s valve timing may be altered simply by reshaping the holes in its cylinders, and its power output markedly changed by utilizing inertia and resonant effects in its intake and exhaust tracts. Calculates port heights from durations, or durations from port heights. Softengine engine simulation software 2tbase seven software. The twostroke engine is a common power source for small and. The cost to convert this program into a full windows program like our dynomation5, four stroke simulation would prevent it from ever being released. There is one or more forwardlocated exhaust ports, two or more side transfer ports, and one rear intake port. Two stroke engine porting zmod for android apk download.

Porting and polishing twostroke motorcycle engines. Two stroke cylinder porting tips watch this before you start cutting. Part of the problem is understanding the pulse or charge nature of the airflow in a 2 stroke engine. The 4 21 system gives good allround power, with no special power peaks or dips, while a 4 1 system give the best power at higher revs at the expense of low end power. 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. The worlds leading 2stroke engine simulation software for 3. If you keep your compression high and do not go crazy on your exhaust timing, you can get plenty of torque out of a chainsaw engine for its displacement. The newest info i have is the two stroke tuners handbook by gordon jennings. Build 2 stroke exhausts, know how to change gear ratios depending on racetrack, simulate realworld performance with our bike dynamics simulator. For port work, one company that will help you is 2 strokeporting.

Our goal is to achieve the biggest power gains as possible, while maintaining reliability on your 2 stroke engine. 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 description of 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. We specialize in optimizing flow characteristics of your 4 stroke head. 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. Diy moto fix website rebuild your dirt bike engine. There are no ports in the cylinder wall of a fourstroke. Subsequently, the meshing process is implemented using avl fire software. Crankcase and cylinder porting is probably the most controversial subject among performance 2stroke engine builders. Moreover, interest factors like the port parameters are computed even if the. While twostroke engine development is on the rise again, the worldwide. Many things will affect the power delivery of two stroke motorcycle engines.

This is the third of a series of videos on the topic of 2 stroke engine ports. The information used in the programs calculations was taken from the books the basic design of the two stroke engine and the book design and simulation of two stroke engines. On the other hand, while the two stroke engine does not commonly require large. In order to obtain maximum results matching the carbs. Unlocking the secrets of 2 stroke porting, part 2 how to trace and measure ports. Pipes, silencers, carburetors, reeds and valves are all popular bolton modifications. 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. 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. You should read about how the two stroke enigne works before you attempt this. Are other modifications necessary to get the enhancement from the porting.

However, optimization of a particular design using such. Everything you need to know about the twostroke cylinder. Dynomationtwostroke engine simulation motion software, inc. Cc specialty tools will always be the company to go to for all your porting and polishing tools and equipment. It is very important to understand that tuning a single item fitting bigger. Porting goes hand and hand with high performance camshafts. Support for windows not only makes the program easier to use, but it also allows the growing number. This is the third of a series of videos on the topic of 2 stroke engine ports that you need to know if you are intending to modify your 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. My porting setup affordable and functional 2 stroke tuning.