2 stroke expansion chamber calculator download

There are a few software programs available for 2 stroke simulations. 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. Expansion chamber calculations by an excel workbook file. Using apkpure app to upgrade two 2 stroke exhaust expansion chamber calculator, fast, free and save your internet data. Jan 15, 2005 ok, i had a question up a week or two ago about why two strokes have their expansion chambers in the pipes. Direct comparison between different types of exhausts for the two stroke engine, on the left you can see the engine and its exhaust, in the.

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. 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. Hence, more people are now looking at restoring and tuning these bikes. The official home page of our 2 stroke wizard tuned pipe.

This coefficient kh is called the horn coefficient, with typical values between one and two. Dec 17, 2019 look at most relevant 2 stroke expansion chamber websites out of 501 download 2 stroke wizard tuned pipe free. Got all the info we need, and were finally ready to start the design. The calculated compression ratio is usually referred to as the trapped compression ratio. Expansion chamber for 2 stroke what do u recommend. Two 2 stroke exhaust expansion chamber calculator, fast, free and save your internet data. To edit a copy of this document, go to file at the top left of the page, and either download a copy. Finally, enter the exhaust duration of 184deg and the peak power speed of 12500 revsmin and click the design now button. The basic principle of the tuned pipe is making use of the moving air masses in the exhaust to assist in the scavenging the process whereby the exhaust gases are removed and replaced with unburnt mixture of a 2 stroke engine. Free download here this program is not a part of mota, but it has been put together by the same engineers as a starting point for those wishing to begin from scratch.

Note that you do not require a paypal account as you can use your credit card. This will get you started by providing, for your engine, the dimensions of an expansion chamber with a 2 stage or 3stage diffuser. This small java applet uses design rules according to, and, to size a tuned pipe for a 2 stroke piston engine. Could it give a four stroke the two stroke famous bighit. The calculations are assuming a speed of sound in the exhaust gas, which is not known exactly. On a twostroke engine, an expansion chamber or tuned pipe is a tuned exhaust system used. Notes on my free spreadsheet of mini 2 stroke calculators some of these calculators have never been available till now although engineering types have always been able to figure this stuff out. This program calculates the dimensions for both double and triple stage diffuser expansion. After download unzip installer from zip file right click file in. The two tuned lengths of the 2 stroke expansion chamber, photo of compression wave formation. Jan 23, 2019 2 stroke exhaust expansion chamber calculator using 3 methods. Two 2 stroke exhaust expansion chamber calculator for. Free 2 stroke expansion chamber calculator software update.

Automatic computation of pipe skeleton basis lengths stinger, baffle cone. Fourstroke expansion chambers general dirt bike discussion. Automatic new version checking for download in about dialog. This software covers the 3 stage diffuser type expansion chamber exhaust as per equations provided in his book entitled design and simulation of two stroke engines published in 1996. Jan 28, 2011 i bought an expansion chamber design program, and it produced numbers more in line with what i though i should have from what ive been reading.

Download my free calculators spreadsheet to check your computers ability. Next enter the cylinder bore and stroke which are 40. A strong pressure wave sucks out burnt gases from cylinder. I say that because the 6mm aluminium bash plate on my 310 has deep gouges and dings that would ruin a frame. This program calculates the dimensions for both double and triple stage diffuser expansion chambers from a few basic engine dimensions. Free 2 stroke exhaust expansion chamber calculator youtube. How to design a two stroke expansion chamber performance. Without a pair of really good chambers you will never get much power from you rd 350 ypvs.

For four stroke engines it is standard practice to calculate compression ratio based on the full swept volume of the engine. Two stroke tuning by alexander graham bell excellent book. On a two stroke engine, an expansion chamber or tuned pipe is a tuned exhaust system used to enhance its power output by improving its volumetric efficiency. Birdcage software 2 stroke expansion chamber exhaust calculator software. We also have a simple 2 stroke expansion chamber design program.

A simple 3 stage two stroke exhaust calculator based on formulas of g. Aug 19, 2014 im looking for advice on pipe guard protection for the shiny new fmf gnarly bolted onto my first ever 2 stroke sherco300 im paranoid itll be beaten to death in no time. Enthusiasts, tuners, mechanics, gp, drag racing, mx, enduro. The one i have been using is call mota, from ian williams tuning. Bigger carburetors, higher compression ratios, altered port timings and expansion. This is often referred to as geometric compression ratio but is also known as the static compression ratio. Nov 27, 2018 2 stroke exhaust expansion chamber calculator is now ready for download follow the link to my software site and go to the 2t exhaust.

There are many ways to boost the power, one of which is by installing a tuned pipe. Method 1 and method 2 two and three stage diffuser. Download 2 stroke exhaust calculator for pc free download 2 stroke exhaust calculator for pcmacwindows 7,8,10, nokia, blackberry, xiaomi, huawei, oppo free download 2 stroke exhaust calculator android app, install android apk app for pc, download free android apk files at. 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. It is the 250cc to 500cc sized bikes that have seen a marked increase in second hand values. New install file and cad viewer path saved in ini file to make it easy no need to do it each time. Two 2 stroke exhaust expansion chamber calculator using 3 methods. Nov 02, 2019 for introductory material on 2 stroke engines please see the following links. Two 2 stroke exhaust expansion chamber calculator apps. The chambers is the single most important thing when it comes to tuning the 2 stroke engine.

Specificaly written for gokarts engines, but will do any 2 stroke. May 03, 2018 freeware 2 stroke expansion chamber exhaust calculator program download at. Feb 22, 2017 claim that muffler expansion chamber on four stroke engines boosts power hi all, im relatively new to four stroke engines so i was curious when i saw this for sale ad on a canadian model airplane forum for what looks like a tuned pipe but the poster says is not with the claim that it boosts the power of the four strokes it fits. Do it right by doing it yourself this screenshot is sheet 1 of 4 sheets. Wrt1d1x2sw where wrt1 is the wave return time for the first part of the wave, d1 is the distance from cylinder port to beginning of diffuser, and sw is the speed of the wave which is determined by the temperature and. I have plans this winter to put my yz 125 motor in it but i would like to see how this little motor runs with a good pipe vs the stock one that i think is holding it back. Just a quick update on the progress of the freeware 2 stroke expansion chamber calculator software. We now have a simple 2 stroke expansion chamber design program. This uses my formula that goes mostly by the oils viscosity and viscosity index. The program takes your info and spits out a sheet with lengths and diameters. Any donations greatly appreciated, please use paypal link. It is also very good for expansion chamber designs. You can also save and load the data by using the provided functions. The way to calculate the return timing and length of the negative wave in a 2 stroke expansion chamber is by this formula.