Engine Tuning – Gives More Power in A Car
If you are keen to enhance engine power in a 4 stroke engine then the efficiency of all the strokes, particularly intake as well as exhaust strokes, should be improved. You should understand how the 4 stoke cycle of an internal combustion engine produces more power for increasing engine power output. The 4 stroke cycle is also called Otto cycle.

Understanding the power basics is very crucial to do engine tuning. The volume of air plus fuel mixture drawn into a cylinder, in regard to the volume of cylinder, is known as volumetric efficiency or VE of engine. By maximizing the engine’s VE you can effectively enhance engine power, particularly in case of stock engines that usually have the VE close to 85%. On the other hand the older engines have the VE near to 70%.
The fuel possesses the chemical energy needed to drive an engine. The air permits the fuel to burn as well as release energy. Very little air would result in a rich fuel mixture which would not burn fully and all the energy of fuel will not be released. This robs the engine of both power plus economy. Extra air results in a lean fuel mixture which burns very fast. If the mixture of air/fuel burns very fast, it spends the energy quite soon and this creates extra pressure very quickly. This could result in an irreparable damage and harm to the engine.
You should note that the chemically perfect air to fuel ratio is 14,7 parts of air to 1 part of fuel (or 14,7:1). This is called the stoichiometric condition. But, the requirements of air plus fuel mixture in an internal combustion engine get influenced by engine load, temperature and RPM. Heat is needed for the fuel vaporization.
Due to this, in the conditions of cold start, there is a need for richer mixture. On the other hand at wide-open-throttle or full throttle there is a need for leaner mixture. Fuel injection gives a key advantage as compared to the carburetor. It provides the right mixture of air/fuel under different conditions.
Engine tuning has got much relevance for tuning cars. It gives very quick and effective results to get much better performance.



