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The S63 is the BMW M version of the N63, which debuted in the BMW X6 M and was used in the BMW M5 models from 2011 to 2023. The S63 uses two twin-scroll turbochargers plus a pulse tuned, cross-engine exhaust manifold [ 8 ] to keep constant exhaust pulses flowing to the turbos at every 180 degree rotation.
For water-cooled engines on aircraft and surface vehicles, waste heat is transferred from a closed loop of water pumped through the engine to the surrounding atmosphere by a radiator. Water has a higher heat capacity than air, and can thus move heat more quickly away from the engine, but a radiator and pumping system add weight, complexity, and ...
The size of the radiator (and thus its cooling capacity) is chosen such that it can keep the engine at the design temperature under the most extreme conditions a vehicle is likely to encounter (such as climbing a mountain whilst fully loaded on a hot day). Airflow speed through a radiator is a major influence on the heat it dissipates.
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Three unique models that BMW Motorsport created for the South African market were the E23 M745i (1983), which used the M88 engine from the BMW M1, the BMW 333i (1986), which added a six-cylinder 3.2-litre M30 engine to the E30, [128] and the E30 BMW 325is (1989) which was powered by an Alpina-derived 2.7-litre engine.