Originally Posted by antoine80
I looked again at their website and i didn't find for instance extensive information for breaking in, but i should agry with you that documentation does not win races.. but can help you make the life of the engine longer
what is the difference between Long and Short stroke ?
BR
Antony
Copy and Paste from Novarossi Website:
"A gas powered engine requires careful running in to allow the internal parts to achieve proper operating clearances.
Enrich the fuel-mixture from factory position by turning the main needle 1/2 turn counter-clockwise. Run the car up to half-speed (at most) using moderate acceleration. Do this for 4 - 5 tanks of fuel. On the next 3 tanks of fuel, slowly increase the speed and acceleration, and start leaning the main needle setting by turning the needle clockwise.
The right engine temperature will vary widely, depending on the air temperature, fuel used, altitude, driving style, air flow conditions of the body and several other factors. There is absolutely no way anyone can tell you an ideal engine temperature. It is generally accepted that a proper range of temperatures is between 95 and 115 degrees Celsius (or about 205 and 240 degrees Fahrenheit). The biggest variable of all in measuring engine temperature is where and how the measurement is taken. Your infrared thermometer may be calibrated completely different than ours, or you may be pointing at a different spot on the head. We usually check the temperature pointing the infrared on the glow plug.
The fastest way to know if your engine is running properly is to read the glow plug and the under head. It is usually possible to take out a new glow plug of an engine and look at it closely to see if the engine is running too rich, too lean, etc. Using a new glow plug, install it in the engine you want to test. Run the engine for a full tank of fuel at race speeds. When the engine runs rich the wire is wet and shiny and the under head is white coloured. Normally when the engine runs lean the wire is dry and out of shape; the surface of the under head could be damaged. The wire is lightly wet and shiny and the under head is gold coloured when your engine is well tuned."
Is this extensive enough?
A shorter stroke engine will "usually" rev harder, and make more of it's power higher up in the rev range. A Long stoke engine is "supposed to" produce it's power and torque at a lower RPM.