Simple 2 stroke tuning books

Those of us who have grown up in the japanese two stroke. Hey chris, im really sorry but when it comes to 2 stroke tuning i cant offer any help. The worlds leading 2stroke engine simulation software for 3. You can also save and load the data by using the provided functions. Mechanically, the twostroke engine is very simple, and unfortunately on. The piston crown opens and closes the exhaust and transfer ports. Two stroke performance tuning a disc partially cut away and attached to the end of the crankshaft opens and closes an inlet port in the side of the crankcase.

Basic 2 stroke tuning by eric gorr changing the power band of your dirt. Ive simply never had any experience with 2 stroke engines and have never had any reason to do my own research into their tuning. No new car marketed in the united states has been powered by a twostroke engine since saab phased out its hardtohousebreak 3cylinder in. You can calculate easily and fast the oil quantity by dragging two bars without entering numbers with keyboard. Turbo and even supercharger setups of various configurations can be very useful, however, they are often more complicated with 2 stroke tuning than with 4 stroke applications on a tangent, i did witness a 50cc turbo 2 stroke bike that would do over 150mph, but i digress.

Very few other books on engine development and most of these are either devoted to car engines or are out of date promoted by performance bikes. Geared specifically for gp and kart racers, this hardback treasure has turned out to be a great reference source for questions on the logic and concepts that pertain to tuning a 2stroke for maximum performance. 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. An innovative solution for twostroke engines to reduce. I usually recommend this book along with gordon jennings two stroke tuners handbook, because. Other books to his credit are modern engine tuning, twostroke performance. Other books to his credit are modern engine tuning, twostroke performance tuning and forced induction performance tuning. I have the book, but its nice to have as a pdf as well and a good reference for those who dont know about it. Except for the short rpm range of dynamic tuning, twostroke engines are affected by the shortcircuit of fresh airfuel mixture during the scavenging process. Im the engine and drivetrain design lead for my formula sae team so i have a lot of new members asking me how to learn more about engines so they can get involved with the technical parts of design. Graham bell is an acknowledged expert on engine tuning, with many years experience in this field. Transfer, ignition, an exhaust systems explain all of the best ways to improve the engine from stock with simple. How 2stroke exhaust pipes work offroad engineered duration. If your looking for the best from your 2 stroke mad biker designs has its own dedicated tuning arm under mad biker developments not content with being one of the premier parts suppliers in the uk from world renowned companies, such as brembo, dymag, samco to name but a few.

I give a few tips on how to do this for your own show some of the simple mandrels i. 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. For sheer power for money and driveability the best setup would comprise of. A twostroke revival, without the blue haze the new york. If nobody else on here can step in with their experience. Troubleshooting with simple solution here is a seldom talked about solution to an outboard. A simple 3 stage two stroke exhaust calculator based on formulas of g. Making a 2 stroke pipe for the rs100 fabricating and welding cones js garage. Jennings book talks about port time area and porting the cylinder to have peak efficiency at a certain rpm. In the model tuning tips chapters of this book, all the head specs. Fit the head gasket and head and turn the crank to move the piston just past tdc. The two stroke dirt bike engine building handbook is the most comprehensive guide for dirt bike engine building available, whether you are working at home or as a professional in a shop. Enough to get you started and hopefully lead on to growing your own knowledge and skills. If you are a novice or beginner then this book is for you.

The most common mistake is to choose the wrong combination of engine components, making the engine run worse than stock. Basic 2 stroke tuning changing the power band of your dirt bike engine is simple when you know the basics. Ill try and get the ball rolling in here with a list of books i currently own on 2 stroke engines, and 2 stroke engine performance tuning. 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. Graham bell steers you through the various modifications that can be made to coax maximum useable power output. With the traditional lubrication technique of mixing oil into the fuel, they also have the advantage of working in any orientation, as there is no oil reservoir dependent on gravity. This 2stroke carb tuning guide will give you all the information you need to tune your 2stroke carburetor for peak performance, no matter the make or model.

Bigger carburetors, higher compression ratios, altered port timings and expansion. Get it if you want to squeeze peak performance out of your 2 stroke engine. The website does not intend to compeed with any other website dealing with 2stroke tuning, and the information shared is not at all as thorough as what you can get from reading the books. Those of us who have grown up in the japanese twostroke. Again, as of right now i am just reading tuning books, but i have never heard of fresh air entering in the expansion chamber, nor any mention from professional tuners that tune bikes 2 and 4 strokes on dynos that a wideband 02 sensor wont work in a 2 stroke. Carefully pull one strip of clay off the piston and then measure the thickness of the clay left on the piston. This coefficient kh is called the horn coefficient, with typical values between one and two. Graham bell steers you through the various modifications that can be made to coax maximum useable power output and mechanical reliability from your twostroke. An introduction to tuning 2 stroke motorcycles for those who want results straight out of the box. Twostroke petrol engines are preferred when mechanical simplicity, light weight, and high powertoweight ratio are design priorities. Tuning and jetting honda, ktm, kawasaki, yamaha, suzuki, husaberg, husqvarna, tm, gas gas. Two stroke tuner s 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. Although there is really no shortage of books on the subject of 2stroke tuning and preparation, i knew that an active software programme would be able to offer so much more. 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.

Once you understand the basic functionality of one 2stroke carburetor, you. Reviewed in the united states on november 20, 2014. Graham bell starts off by saying that he doesnt believe port time area and its all about the duration the ports are open. A textbook dealing with the principles of design and construction, with a special chapter on the twostroke engine paperback or softback by kean, francis john and a great selection of related books, art and collectibles available now at. Motorcycle tuning two stroke will therefore guide you through the necessary stages which can enable a stock roadster engine. There are many ways to boost the power, one of which is by installing a tuned pipe. Two stroke cylinder porting tips watch this before 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. The two stroke dirt bike engine building handbook diy.

Everyday low prices and free delivery on eligible orders. Mota software, 2 stroke engine simulation software, 2 stroke exhaust design. Two stroke engine porting, head mods and pipes two stroke tuning advice from the experts at bimotion. Velosolex s 3800 2stroke tuning and engine design books. The way a two stroke motor works causes them to be f. You can gate the books wherever you desire even you are in the bus, office, home, and further places. Most tuners prefer tuning by afr and monitoring with egt gauges. We now have a simple 2 stroke expansion chamber design program. The two stroke engine its design and tuning 9780854291571 by draper, k.

Small values of kh are best suited to grand prix engines with narrow power bands, larger. It is my hope that this book will assist the enthusiast involved in motocross. Detailing for any one interested in increasing the performance of their machines. Anyone interested in doing their own engine porting, or taking the time to learn the intimate secrets of 2 stroke engines should take. Making a 2 stroke pipe for the rs100 fabricating and.

Most of my friends and i rode 2 stroke street bikes and welcomed the. The book has simplified formulas and teaches the importance of measurements. They are so simple and fun that ive always enjoyed tinkering with them. Just recent got my kx100 and ive always loved 2 strokes and definitely wana learn more about building and tuning them any good books i can buy out there. Two stroke engines abebooks abebooks shop for books.

I started reading these about a year ago now and ive learned so much in just the short time already its mind boggling. His port time equations dont even include rpm, you input the dime. Goodreads helps you keep track of books you want to read. Motorcycle tuning twostroke motorcycle tuning in this well established book, now brought up to date in a second edition, the technical editor of performance bikes shows you how to evaluate your engine, how to assess what work you can undertake yourself, and what is best left to a specialist.

The process of building twostrokes to race engine quality is explained indepth in this thoroughly illustrated handbook. It can store settings for up to 4 motorcycles such as fuel tank capacity tap to change, oil ratio and the name of the bike. Stan by removing the spark plug, threading in rhe adaprer, and holding the. The power listed on this guide is from experience not claims. The first issue to address is jetting and carburettor tuning. He has taken some research that was done and published by nagao to do with inlet tract delivery ratios and without emphasising it nagao introduced the idea of port timeareas. Tips on how to port a two stroke cylinder, what to donot do and how to do it right. Find all the books, read about the author, and more. This toolkit offers some basic two stroke engine calculators in hand but also extends to some advanced as well tuning menu. The faliure of the 50 mph trike was most likely not caused by wear and tear on the engine, or even damaged parts, but by a simple mistake in the tuning process. A myriad of different aftermarket accessories is available for you to custom tune your bike to better suit your needs. The morbidelli 125 twin road racer is a rotary valve engine.