Lennart olars with his saab 96 2 stroke 2 cycle on song in skepptuna, 2004. Basic 2stroke engine tuning information joe hunt rc. Two stroke to turbo cars for breaking 93, two stroke to turbo, cars for sale, used cars for sale, services, mot testing in bassingbourn brake services in bassingbourn, affordable car body repairs, any parts available car body repairs, saab. Two stroke performance tuning volume of the cylinder with the piston at tdc figure 2.
Once you understand the basic functionality of one 2 stroke carburetor, you can. Two stroke to turbo is a team of independent saab specialists in royston. Fire rings in bore sizes up to 75mm quality gaskets made is the usa by cometic. We offer a variety of services, such as car body repairs in bassingbourn. We run these at bonneville with up to 181 compression ratios and over 200psi compression without issues.
Get the best deals on vintage parts for 1 96 6 saab 96 when you shop the largest online selection at. Saab, spares, parts, tuning, workshop, breakers, maptun, saab spares, two stroke to turbo cars for breaking 93, two stroke to turbo, cars for sale, used cars for sale, services, mot testing in bassingbourn brake services in bassingbourn. So, if you grew up around motorcycles, your brain might associate two stroke with the warmth of family, the pride of winning a race, or the satisfaction of tuning a. Parts for sale for vintage saabs tom donney motors. Long before turbocharging, keys in the floor and couchswallowing hatchbacks, the hallmark of saab was the ringdingdingding of its twostroke engines. The way a two stroke motor works causes them to be f. Lets journey back to 1973 and read the book that was the two stroke bible of that era. Ray pye dissatisfied of his motorcycle bsa rocket iii has decided to eliminate its original engine and replace it with the small twostroke engine used by saab on his 96. Two stroke engine was a saab oddity and persisted until 1966.
Start up of saab tuned three cyl two stroke engine duration. Top dead center tdc when the piston is at the top of its. 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. Ground the spark plug by making contact between the spark plug and the cylinder fins. There is a huge interest in vintage snowmobiles and their simple two stroke power plants of yesteryear. Other books to his credit are modern engine tuning, twostroke performance tuning and forced induction performance tuning. Vintage saab sonett singing on dyno two stroke youtube. Check if spark is being generated from the spark plug. As a general reference point, or when installing a distributor, top dead center tdc on the compression stroke is. The most common mistake is to choose the wrong combination of.
They are so simple and fun that ive always enjoyed tinkering with them. Top dead center tdc for any internal combustion engine refers to. Reviewed in the united states on november 20, 2014. Researchers have found that it is the gases at the very outer limits of the combustion chamber, called the end gases, that selfignite to cause detonation. The car is located in lima, peru and i can send it anywhere of the world with aditional engine of spare. The durability of the design has been proven in scca road racing where the v4 engine has raced problem free for several seasons in our dsport race car. I made this video long ago, but forgot to upload it.
This 2 stroke carb tuning guide will give you all the information you need to tune your 2 stroke carburetor for peak performance, no matter the make or model. So, a piston can be at top dead center tdc on the compression stroke and on the exhaust stroke. 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. Basic 2 stroke tuning by eric gorr changing the power band of your dirt bike engine is simple when you know the basics. This 1966 saab 96 looks a bit rough and is sold without a title, however its triple carb three cylinder two stroke does run and the seller claims to have driven it around the block. Two stroke to turbo ltd saab garage in royston hertfordshire. Mat people had no prior experience with two stroke saab engines but did the job anyways. In 1966, saab introduced a modified two stroke engine with higher performance. The engine had 3 carburettors and to reduce smoke, a common complaint from many owners of earlier cars with 2 stroke engines, the fueloil mixture ratio was lowered from 3% to 1. Detonation is devastating because of the extra piston heat incurred going. Buyers guide saab 96 all the info from twostroke to v4. Squish measurement and adjustment on 2 stroke engines.
Simple twostroke cylinder porting tutorial youtube. Two stroke motors are very touchy in the tuning process, if they run too rich, they bog down and quit. How to tune your carb carburetor tuning tips and tricks. You should read about how the two stroke enigne works before you. Saabsa saab twostroke engine swapped in motorcycle. Twostrokes use the same principles, but the intake side is not tuned. This 1966 saab 96 looks a bit rough and is sold without a title, however its triple carb three cylinder twostroke does run and the seller claims to have driven it around the block. Still not the highest level which would be possible with a 90cc twostroke of. Saab two stroke motors are extremely high performance motors and they required premium fuel. A myriad of different aftermarket accessories is available for you to custom tune your bike to better suit your needs.
Two stroke engines have lower velocity so the needle jet has a halfmoon shaped hood protruding into the venturi to produce a low pressure area that aids in drawing the fuel up through the needle jet. In general, this car needs restoration and if someone enthusiastic in this class of car is interested please contact to me. Those of us who have grown up in the japanese two stroke. They had sent the engine to finland to be restored. There is the personal side of my life, injuries, marriage, tragedies, getting old. Saab two stroke head gaskets for 750cc and 850cc bullnose and longnose. Minimal changes only driven by modifications and perfomance upgrades. By david lachance from the march 2010 issue of hemmings motor news. Montecarlo, and standard motors suffered from detonation in the 1960s and do now the 1990s.
The reason the trikes motor blew up, was because it was. Gathering of the saab 2stroke machines in hedemore october 17, 2017 october 17, 2017 no comment famous automobile magazine bilsport meaning autosport in english published in karlskrona, sweden gathered a large number of good old saab machines last month. As it turned out mat had restored a saab 96 sport engine for a customer from monaco just the engine, rest of the car was done in monaco. Im owner of a saab 96 two stroke and i need to sell it. There are many ways to boost the power, one of which is by installing a tuned pipe. In this well established book, now brought up to date in a second edition, the technical editor of performance. Graham bell is an acknowledged expert on engine tuning, with many years experience in this field. Not only are twostrokes and triple cylinder arrangements much more for bikes than cars, but the 841cc capacity was much more appropriately sized for a bike than even a small, light car like the saab. Very interesting book, lots of great insights and tidbits of knowledge even for those who dont plan to tune any two strokes any time soon. While inspecting a saab 96s bodywork, pay attention to the condition of the front valance, especially around the corners where the panel meets the front wings.
Differences in two stroke and four stroke carbs the difference between a two stroke and four stroke engine is intake velocity. We create high performance parts for 2 stroke race engines, based on our many. Graham bell steers you through the various modifications that can be made to coax. Squish is an effect in internal combustion engines which creates sudden turbulence of the fuelair mixture as the piston approaches top dead center tdc. There is a wealth of knowledge contained in this manual. Two stroke performance tuning two stroke all of these detonation triggers are virtually unavoidable, with the exception of excessive spark lead. Saab 96 sport 2 stroke bullnose v4 sonett gt 1964 1965 1966 gear lever shift nos. 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.
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