I am looking for any equations or rules of thumb for calculating theoretical 2 stroke engine horsepower. How to download javapipe to use as a standalone application. 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. Return to the 2 stroke wizard tuned pipe details page.
The actual gas leaving the pipe during a particular cycle was created two or three cycles earlier. Im currently a jc 30 evo on a canister, but was looking for a but more power for better pull out from a prop hang. Look very good and i understand this program gave excellent performing pipes to others. By brandon7711, january 14, 2016 in general dirt bike discussion. Oct 02, 20 2 stroke wizard tuned pipe free download. So whether you have a 50cc road bike, a 500cc motocrosser or a classic racer, we will design the perfect exhaust system for you. Two stroke performance tuning chapter 3 porting and cylinder scavenging today, when we take a look down the cylinder of a twostroke engine, we find its walls literally filled with ports to handle the induction, transfer and exhaust phases of gas flow through the engine. Improving the performance of twostroke motorcycle with tuned. Engineering acousticssonic supercharging of 2 stroke. 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. Pdf improving the performance of twostroke motorcycle. A simple 3 stage two stroke exhaust calculator based on formulas of g. Click here to download a spreadsheet that will let you figure out your engines exhaust pulse time duration. 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.
An excellent academic book on the theory behind performance tuning for 2 stroke motorcycles. You could prolly fab an aftermarket scooter or 80cc pipe on there. Engineering acousticssonic supercharging of 2 stroke engines. The way a two stroke motor works causes them to be f. Nov 05, 2011 a simple 3 stage two stroke exhaust calculator based on formulas of g. 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. There was a procircuit works pipe on my cr250 when i bought it. 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. Do it right by doing it yourself this screenshot is sheet 1 of 4 sheets.
Simply put, the tuned pipe acts as a supercharger for out two stroke engines. It assists in evacuating pulling exhaust gases from the engine and also pushing unused fuelair mixtures back into the combustion chamber at very specific moments during the stroke of the engine. Cobra drag bike with rider eric edwards jnr 20 tm85 motocross bike. If the link is offline, please contact us and we will fix it as quickly as possible. In twostroke engines where the exhaust port is opened by being uncovered by the piston rather than by a separate valve, a tuned exhaust system usually. You can also save and load the data by using the provided functions. 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 2stroke engine. Click button above and try 2 stroke exhaust expansion chamber calculator mod free on your device. 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.
Get peak performance from your rc car, buggy, truck or truggys nitro engine with a tuned pipe. This coefficient kh is called the horn coefficient, with typical values between one and two. You know that changing the exhaust pipe and pipe length on your boat can have a marked effect on the engines power characteristics, but do you by how much and why. What sort of an increase will a tuned pipe give over a canister muffler. 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. A two stroke 125cc engine with standard exhaust system can combust no more than 125cc of fuel air mix. Those of us who have grown up in the japanese twostroke. Engine pulls extremely strong from 8,000 revmin resulting in a very flexible power band.
Just a quick update on the progress of the freeware 2 stroke expansion chamber calculator software. This will get you started by providing, for your engine, the dimensions of an expansion chamber with a 2 stage or 3stage diffuser. Geared specifically for gp and kart racers, this hardcover treasure has turned out to be a great reference source for questions on the logic and concepts that pertain to tuning a 2 stroke for maximum performance. It is only the wave energy itself that traverses the whole pipe during a single cycle.
A tuned pipe is made of between 3 and 4 characteristic sections depending on the desired effect. Free 2 stroke exhaust expansion chamber calculator youtube. I dont have access to a 2 stroke engine simulation program. If i were to ever take up engine building i would highly recommend this book.
Improve the performance of your two stroke engine with a torqsoft designed exhaust system. Question about 2 stroke pipe shapes general dirt bike. Pipe has been designed to peak engine at 12,000 revsmin with excellent over rev to,000 revsmin. 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.
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. Dec 17, 2019 download 2 stroke wizard tuned pipe free. This small java applet uses design rules according to, and, to size a tuned pipe for a 2 stroke piston engine. Free drawer torrent brick page pro setstwo mb for filesonic the. Those used in this program have been chosen for petrol engines, and are in the range 50cc up to about 500cc per cylinder.
Racingsm software has features for many different areas 2stroke 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. Get your kindle here, or download a free kindle reading app. Galaxy apollo, galaxy fit, galaxy gio, galaxy mini, galaxy mini galaxy pop, galaxy note. Bigger carburetors, higher compression ratios, altered port timings and expansion. How to design a two stroke expansion chamber performance exhaust step 6. Good article on how i made these tuned pipes for a 2 stroke. We now have a simple 2 stroke expansion chamber design program. Mota software, 2 stroke engine simulation software, 2 stroke exhaust design. Small values of kh are best suited to grand prix engines with narrow power bands, larger.
After our trial and test, the software was found to be official, secure and free. And four strokes have lots of torque, they swing larger props, but at lower revs. Mota software, 2 stroke engine simulation software, 2 stroke exhaust design mota and the new motax. Mota for windows slide show of features millions of tuning variations possible. Jan 19, 2008 he will do one of two things,hang up, or if he is a good one,start explaining the complex nature of fluid dynamics, sonic wave pressures and the effects temperature on the speed and timing it takes to hit an open exhaust port at 6500 rpmsthis being said. More by who is weekly newsletter of discounts, coupons and latest offers for software like 2 stroke wizard tuned pipe 1. 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. This is why exhaust gas sampling on two stroke engines is done with a special valve right in the exhaust port. How to design a two stroke expansion chamber performance exhaust step 2. I tried a few free ones, but the first attempt at making a pipe from those didnt work so well. Pipe has been designed to peak engine at,200 revsmin. Improve the performance of your twostroke engine with a torqsoft designed exhaust system. They are so simple and fun that ive always enjoyed tinkering with them.
It is pretty simple to use provided you have all the data and seems to be pretty accurate from any checks i have done. We also have a simple 2 stroke expansion chamber design program. Dont seem like much but throw 20 cuts in there and the pipe will be half inch shorter. No use what so ever, 2 strokes exhausts need back pressure, tuned pipes add back pressure, as on 2 stroke motorcycles, 4 strokes hate back pressure, hence straight through exhausts.
Free 2 stroke expansion chamber calculator software update. Do you still get a decent throttle range with a pipe, or is the power onoff like you see on smaller glow engines. The calculations are assuming a speed of sound in the exhaust gas, which is not known exactly. Minimum to maximum acceptable exhaust pulse widths are.
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. We will recheck 2 stroke wizard tuned pipe when updated to assure that it remains clean. 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. We shall send you a pdf document with the templates for manufacturing your exhaust. Click here to download a spreadsheet that will let you figure out your engines exhaust. The official home page of our 2 stroke wizard tuned pipe. Download tuned pipe martin hepperle emoryautrys blog. Using apkpure app to upgrade 2 stroke exhaust calculator, fast, free and save your internet data. How to design a two stroke expansion chamber performance.
The description of 2 stroke exhaust calculator a simple 3 stage two stroke exhaust calculator based on formulas of g. Acceptable piston stroke is 28mm to 81mm in version 29. Its a full time job to scrub it with steel wool and wipe it down with wd40 to keep it rust free. Here is the official description for 2 stroke wizard tuned pipe. There are many ways to boost the power, one of which is by installing a tuned pipe. 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. Those of us who have grown up in the japanese two stroke. 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. Download it here go to the 2t exhaust calc menu item.
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