I then fine tuned my formulas to match his results for the pressure waves and. When the descending piston first exposes the exhaust port on the cylinder wall, the exhaust flows out powerfully due to its pressure without assistance from the expansion chamber so the diameterarea over the length of the first portion of the pipe is constant or near constant with a divergence of 0 to 2 degrees which preserves wave energy. Although there is really no shortage of books on the subject of 2 stroke tuning and preparation, i knew that an active software programme would be able to offer so much more. It is the twostroke equivalent of the tuned pipes or headers used on. Scalvini pipes for twostroke factory works are handassembled conebycone to make an exhaust that looks as good as it performs. 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. A new version of pipe designer is currently in test. 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 history. Ask our shadetree mechanics 2 stroke wizard pipe builder. They are so simple and fun that ive always enjoyed tinkering with them. 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. Fundamentals of database systems elmasri navathe 5th edition. For port work, one company that will help you is 2strokeporting. Just a quick update on the progress of the freeware 2 stroke expansion chamber calculator software.
Great book, but ill guess the world has moved past that info. I got sick of the silly free programs and the expensive for sale programs and that wasteoftime 2 stroke wizard and so made my own expansion chamber. This version will include export data for cone designer if you want to roll your pipes instead of hydroforming your pipe. Bigger carburetors, higher compression ratios, altered port timings and expansion. This section describes the basic function and the most important processes in the 2stroke cycle a tuner need to consider in general and with the bimotion tuning software in particular. 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. Bsa bantams only have three gears and thus the exhaust design had to give a wide power band. Improving the performance of twostroke motorcycle with tuned.
After our trial and test, the software was found to be official, secure and free. Engineering acousticssonic supercharging of 2 stroke. Jun 08, 2015 2 stroke exhaust calculator racingsm software this is a module for complex 2 stroke exhaust calculation having in account several variables according to lufo racing tuner philosophy. Its a full time job to scrub it with steel wool and wipe it down with wd40 to keep it rust free. 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. Mota software, 2 stroke engine simulation software, 2 stroke exhaust design mota and the new motax. 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.
Oct 25, 2016 download 2 stroke wizard tuned pipe 1. Look very good and i understand this program gave excellent performing pipes to others. This small java applet uses design rules according to, and, to size a tuned pipe for a 2 stroke piston engine. You should only rely on the experience of the very best. 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. We also have a simple 2 stroke expansion chamber design program. Small values of kh are best suited to grand prix engines with narrow power bands, larger.
If anyone happens to have a copy of 2 stroke wizard and wants to either lend me a copy or draw something up for me and email me some plans, it would. Do it right by doing it yourself this screenshot is sheet 1 of 4 sheets. There was a procircuit works pipe on my cr250 when i bought it. You can also save and load the data by using the provided functions. Direct comparison between different types of exhausts for the twostroke engine, on the left you can see the engine and its exhaust, in the center the progression curves of the. Free download full movie gandhi my father 3 mp4 movies. The official home page of our 2 stroke wizard tuned pipe. Enthusiasts, tuners, mechanics, gp, drag racing, mx, enduro. The calculations are assuming a speed of sound in the exhaust gas, which is not known exactly.
Oct 27, 2018 just a quick update on the progress of the freeware 2 stroke expansion chamber calculator software. Fundamentals of database systems elmasri navathe 5th. This will get you started by providing, for your engine, the dimensions of an expansion chamber with a 2stage or 3stage diffuser. Here is the official description for 2 stroke wizard tuned pipe. The result was 25hp at the rear wheel with the engine coming on the pipe at 7000 revsmin and producing usefull power to 1 revsmin using the original cast iron 125cc. Improving the performance of twostroke motorcycle with tuned adjustable exhaust pipe article pdf available in research journal of applied sciences, engineering and technology 12 august. I got sick of the silly free programs and the expensive for sale programs and that wasteoftime 2 stroke wizard and so made my own expansion chamber calculator spreadsheet. However, you shouldnt just pick any business that you can find anywhere. Engineering acousticssonic supercharging of 2 stroke engines. Improving the performance of twostroke motorcycle with tuned adjustable exhaust pipe article pdf available in research journal of applied sciences, engineering and technology 12. The tuned pipe is critical to the performance of twostroke motors because it greatly enhances the motors ability to remove exhaust gases from the cylinder as well as improve the flow of fresh mixture into the cylinder for the next combustion cycle. This will get you started by providing, for your engine, the dimensions of an expansion chamber with a 2 stage or 3stage diffuser.
Each scalvini exhaust cone is hand cut, pounded, and welded to our stringent manufacturing guidelines. A tuned pipe is made of between 3 and 4 characteristic sections depending on the desired effect. It is pretty simple to use provided you have all the data and seems to be pretty accurate from any checks i have done. If you are aiming for these qualities, modifying your 2stroke engine is a great strategy. 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 1 2 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. Oct 02, 20 2 stroke wizard tuned pipe is the best pc program for your expansion chamber exhaust design needs. This coefficient kh is called the horn coefficient, with typical values between one and two. A simple 3 stage two stroke exhaust calculator based on formulas of g.
I tried a few free ones, but the first attempt at making a pipe from those didnt. Database system concepts and architecture fundamentals of database systems, elmasri navathe 5th edition solution manualpdf fundamentals of database systems elmasri navathe 5th edition solution manual. A tuned pipe has a set of cones divergent meaning the cone gets bigger and. The newest info i have is the twostroke tuners handbook by gordon jennings. 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. 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. Pdf improving the performance of twostroke motorcycle.
Im hoping to eventually build an expansion chamber for my little kawi project plug but dont see myself building to many more expansion chambers in the near future. Pete tibbitts emerged victorious with his torqsoft designed exhaust system. We will recheck 2 stroke wizard tuned pipe when updated to assure that it remains clean. We offer free download for windows, mac, linux, mobile applications. There are many ways to boost the power, one of which is by installing a tuned pipe. The official home page of the 2 stroke wizard tuned pipe 4t exhaust header wizard software. The way a two stroke motor works causes them to be f. I really thought we would have a copy at school, but alas, we do not. Using apkpure app to upgrade 2 stroke exhaust calculator, fast, free and save your internet data.
Free 2 stroke expansion chamber calculator software update. Free java pipe expansion chamber program at this address. For a 2 stroke engine the tuned pipe is the section of the exhaust system that begins at the exhaust port and ends at the end of the converging section. An expansion chamber is an exhaust system used on a twostroke cycle. 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. 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. Two stroke engine and exhaust design software north.