Perhaps more important is to ensure a good swirl in the area of the spark plug.
This ensures a mixture quality that is easier to ignite. The spark plug is best
positioned in the centre of the combustion chamber as this reduces the likelihood
of combustion knock by reducing the distance the ame front has to travel.
9.2.3 Compression ratio
The higher the compression ratio, the higher, in general, the thermal efciency
of the engine and therefore the better the performance and fuel consumption.
The two main drawbacks to higher compression ratios are the increased
emissions and the increased tendency to knock. The problem with ...
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