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Cylinder head porting refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve their air flow. Cylinder heads , as manufactured, are usually suboptimal for racing applications due to being designed for maximum durability.
A hemispherical head ("hemi-head") gives an efficient combustion chamber with minimal heat loss to the head, and allows for two large valves.However, a hemi-head usually allows no more than two valves per cylinder due to the difficulty in arranging the valve gear for four valves at diverging angles, and these large valves are necessarily heavier than those in a multi-valve engine of similar ...
Shower curtains. [4] Medical textile ... Monomers are the building blocks of polymers. Polymers in fibers are of two types: additive or condensation. ... a CAD-aided ...
The government of Maharashtra is a democratically elected body in India with the Governor as its constitutional head who is appointed by the President of India for a five-year term. [151] The leader of the party or coalition with a majority in the Legislative Assembly is appointed as the chief minister by the governor, and the Council of ...