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How does compression ratio affect engine efficiency and performance?
Engine efficiency is increased though compression ratio by allowing a more thermodynamic energy to be converted into mechanical energy. Energy transfer is the key to efficiency.
What is meant by cetane number?
A cetane number is a rating given to diesel fuels. It is a rating of how fast the diesel fuel ignites under compression. In diesel engines, there are no spark plugs and the engine uses compression (pressure) to cause ignition.
What is the total displacement in cubic inches of a v6 engine when the compression ratio is 3-3 and 1 half Does it equal 173 cubic inches?
The compression ratio doesn't deal with the displacement, the bore and stroke do. If it's a modern engine it should say the size of the engine in liters. You can use this to convert the engine size to cubic inches. A 173ci engine is a 2.8L engine when converted.
How do you calculate compression ratio?
compression ratio = compressed size / uncompressed size the ratio should be between 1 and 0 (multiply with 100 to get the ratio in percent) a ratio greater than 1 means, the compressed size is actually greater than the uncompressed size a ratio just below 1 means bad compression the lower the ratio, the better the compression
How do you lower the compression ratio of an engine?
There are several means by which the compression ratio of an engine might be reduced although all involve extensive mechanical rework to accomplish. 1) Remove the heads from the motors and grind the compression chambers of the head(s) to make the area larger. 2) Install replacement pistons that have a different shaped piston top (usually a larger "dished" area)
