A twostroke or twocycle engine is a type of internal combustion engine which completes a power cycle with two strokes up and down movements of the piston during only one crankshaft revolution. That shape is an important part of the exhaust tuning. However, you shouldnt just pick any business that you can find anywhere. How to pick the best 2stroke exhaust for your dirt bike. 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. I like the fact that i can see what pressurevacuum is present in the port at the different pistonport positions. How to bend a conetwo stroke pipe model solidworks forums. I didnt like bimotions pipe design software so i bought and used yours.
By rayivers, november 5, 2009 in motorcycle engineering. Longer center section nontapered section, typically the second or third section gives more low end. Flow rate and pipe pressure drop calculator pipe flow wizard is our amazingly easytouse software utility for calculating flow rate in a pipe, calculating pressure drop in a pipe and sizing a pipe diameter. You should only rely on the experience of the very best. Discussion in motorcycle talk started by mitch f, nov 8, 2010. Its pretty easy to identify a 2 stroke exhaust design from a 4 stroke exhaust. Im building a pipe for my wild thing just because i would like to play a little. Dans motorcycle two stroke motorcycle exhaust pipes. Feb 16, 2017 two stroke cylinder porting tips watch this before you start cutting. Calculates port heights from durations, or durations from port heights. Free 2 stroke expansion chamber calculator software update.
The worlds leading 2stroke engine simulation software for 3. Enthusiasts, tuners, mechanics, gp, drag racing, mx, enduro. Nov 05, 2009 has anyone experimented with varying the diameter of the tailpipe section including silencer to dial in a 2 stroke pipe. If youre looking to upgrade or replace the exhaust system on your 2 stroke youve come to the right place. An expansion chamber is an exhaust system used on a twostroke cycle engine to. Motas twostroke dyno will give you and your pc the equivalent of many experts knowledge. The way a two stroke motor works causes them to be f. The program lies within education tools, more precisely science tools. Nov 02, 2019 for further investigate of the operation of two stroke engines with tuned exhaust pipes it is most appropriate to analyze actual test data. After our trial and test, the software was found to be official, secure and free. The charging pressure is often in the region of two atmospheres bar and far over that. The calculations are assuming a speed of sound in the exhaust gas, which is not known exactly. The official home page of our 2 stroke wizard tuned pipe. The pipe flow wizard software calculates pressure drop in the pipe due to friction loss, fitting loss and change in elevation.
The official home page of the 2 stroke wizard tuned pipe 4t exhaust header wizard software. Twostroke oil is expensive, and you need about 4 ounces of it per gallon of gas. I have attach a sample doing similar but using a boundary surface. Engineering acousticssonic supercharging of 2 stroke. Varying 2stroke stinger diameter motorcycle engineering. Did you scroll all this way to get facts about wizard pipe. He is a master pipe welder and has software based on the engine parameters that will make a pipe that will work. Twostroke engines do not use fuel efficiently, so you would get fewer miles per gallon. Here are a few of the very basics regarding pipe design. You can also save and load the data by using the provided functions.
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 2stroke tuner lufo racing, this software is directed for all 2stroke. Our goal is to protect you from all the mental roost thrown your way so you can make an informed decision on the best 2 stroke exhaust system for your ride. There are many ways to boost the power, one of which is by installing a tuned pipe. For port work, one company that will help you is 2strokeporting. Mar 14, 20 i got an email saying the new version of the two stroke wizard tuned pipe program is out, and they have a new add on program which creates plans for a duel power pipe, which is a cone inside the expansion chamber made of perforated metal looks like the same stuff used for the smallest pipe in a silencer. 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. Checking fitup of new pipe notice pipe is only tacked at this stage welding of front pipe 74cc cobra drag bike. Return to the 2 stroke wizard tuned pipe details page.
The shape of the exhaust pipe is not simply that of a constant diameter pipe, such as on a 4 stroke engine. 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. Motax contains all the features found in mota plus expansion chamber. Longer smaller diameter stinger gives more top end. Millions of fluid and thermodynamic calculations are made by mota representing the conditions inside your two stroke engine throughout its complete operating cycle. Expansion chamber calculations by an excel workbook file. As part of the pipe pressure loss results it also calculates and displays the type of flow laminar flow or turbulent flow, reynolds number, friction factor and fluid velocity.
This will get you started by providing, for your engine, the dimensions of an expansion chamber with a 2 stage or 3stage diffuser. Our goal is to protect you from all the mental roost thrown your way so you can make an informed decision on the best 2stroke exhaust system for your ride. Longer and larger head pipe the 1st section gives more low end. North american twostrokes general twostroke discussion two stroke engine and exhaust design software this is the place to talk about anything related to twostroke road race bikes. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Oct 02, 20 2 stroke wizard tuned pipe is the best pc program for your expansion chamber exhaust design needs. Just remember if your cutting a pipe to fit you need to space every cut the same width of the band saw cut to keep the pipe the same length. This project required a specially designed pipe due to the lack of ground clearance. It is the twostroke equivalent of the tuned pipes or headers used on fourstroke cycle engines. A simple 3 stage two stroke exhaust calculator based on formulas of g.
I use the 2 stroke tuners pipe builder program for my pipes and i try to make them as close as possible to dead on modifying existing pipes that pipe is gonna be a super skinny pipe with a 54mm duameter max expansion in the center and a 26 12 lengththat tells ya that theres alot of porting done to the cylinder and are a few mms on each port from running a straightpipe and having. The exhaust gas rushes out into the header pipe and a pressure wave is created. Weekly newsletter of discounts, coupons and latest offers for software like 2 stroke wizard tuned pipe 1. The pipe on our tuned 2strokes is gradually expanding in diameter from the engine to the point where it enters the muffler. Use these basic facts to tweek your pipe to move your power band around. Two stroke design software the following are spreadsheets for different aspects of 2 stroke designmodification. If youre looking to upgrade or replace the exhaust system on your 2stroke youve come to the right place.
The shape of the exhaust pipe is not simply that of a constant diameter pipe, such as on a 4stroke engine. The most popular versions of the pipe flow wizard 1. Small values of kh are best suited to grand prix engines with narrow power bands, larger. We will collect all comments in an effort to determine whether the 2 stroke wizard tuned pipe software is reliable, perform as expected and deliver the promised features and functionalities. 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. Sketch the two conic arches on two perpendicular planes, then sketch the guide lines for the bend. We will collect all comments in an effort to determine whether the 2 stroke wizard tuned pipe software is reliable, perform as expected.
Twostroke waveaction engine simulation motion software. It is shaped like an elongated cone when viewed from the side. This coefficient kh is called the horn coefficient, with typical values between one and two. Racingsm software 2stroke exhaust calculator lufo youtube. Here is the official description for 2 stroke wizard tuned pipe. It have to fit the exhaust port and even the transfer ports too. Torqsoft twostroke exhaust system designer programme. This pc software was developed to work on windows xp, windows vista, windows 7, windows 8 or windows 10 and is compatible with 32bit systems. Ask our shadetree mechanics 2 stroke wizard pipe builder. But because of the limited worldwide activity in two stroke engine development, program sales were limited and further development was curtailed. This is in contrast to a fourstroke engine, which requires four strokes of the piston to complete a power cycle during two crankshaft revolutions. Just remember if your cutting a pipe to fit you need to space every cut the same width of the. Two stroke engine and exhaust design software north. For this we can go to the tfx website where they demonstrate their testing and data analysis software, or read the paper referenced below titled exhaust gas flow behavior in a two stroke engine.
The books ive read seem to indicate a tradeoff between enhanced pipe action and power output reducing diameter and motor overheating with a toosmall pipe has anyone found this to be a problem in real life. Engineering acousticssonic supercharging of 2 stroke engines. I got an email saying the new version of the two stroke wizard tuned pipe program is out, and they have a new add on program which creates plans for a duel power pipe, which is a cone inside the expansion chamber made of perforated metal looks like. Assign fixed relationships between transfers and exhaust port. When combustion occurs in a two stroke, the piston is pushed down by the expanding gases uncovering the exhaust port. But because of the limited worldwide activity in twostroke engine development, program sales were limited and further development was curtailed. Apr 06, 2012 part of the two stroke pipe building process by. More by who is weekly newsletter of discounts, coupons and latest offers for software like 2 stroke wizard tuned pipe 1. I like the fact that i can see what pressurevacuum is. How to plot two stroke expansion chamber cones on paper from software duration.
Just a quick update on the progress of the freeware 2 stroke expansion chamber calculator software. The exhaust pipe of a twostroke engine attempts to harness the energy of the pressure waves from combustion. Two stroke cylinder porting tips watch this before you start cutting. Most use purchased software or use a bells two stroke tuning calculations. It calculates results for a single length of pipe between a start elevation and an end elevation, allowing for the addition of pipe fittings to represents valves.
If you are aiming for these qualities, modifying your 2stroke engine is a great strategy. 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. You would burn about a gallon of oil every 1,000 miles if you used a twostroke engine in a car. Those of us who have grown up in the japanese twostroke. This is why the pressurization of the pipe needs to be well investigated together with the exhaust port, we simply cannot fit any pipe to an engine. Do it right by doing it yourself this screenshot is sheet 1 of 4 sheets. They are so simple and fun that ive always enjoyed tinkering with them. This small java applet uses design rules according to, and, to size a tuned pipe for a 2 stroke piston engine. Our products consist of flange aligners, twohole pins, centering heads, wraparounds, angle and saddle markers, levels, conventional and plasma burning guides, along with various other layout tools. Exhaust and intake tuning building, tips and techniques. This is beneficial for two stroke engines because unlike four stroke engines, they do not have dedicated intake and exhaust strokes and valves. Bike is the cobra cx50 motocross bike with large bore cylinder and an extended swinging arm.
I found most other software work on outdated blair and jennings formulas. We also have a simple 2 stroke expansion chamber design program. This wave can be either positive or negative in pressure. Mota software, 2 stroke engine simulation software, 2 stroke exhaust design. The exhaust designer programme enables the user to design a twostroke 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. Exhaust pipe design with cone layout software by paul crowe if you have ever tried to layout a conic section on sheet metal, cutting just the right piece, that when rolled over and joined on edge, you have a cone with the exact shape, size and angled openings desired, you know its not easy. Its pretty easy to identify a 2stroke exhaust design from a 4stroke exhaust.
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