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VANOS units on the intake and exhaust camshafts of a BMW N52 engine. VANOS is a variable valve timing system used by BMW on various automotive petrol engines since 1992. The name is an abbreviation of the German words for variable camshaft timing (German: variable Nockenwellensteuerung).
A 4-2-1 exhaust system is a type of exhaust manifold for an engine with four cylinders per bank, such as an inline-four engine or a V8 engine. The layout of a 4-2-1 system is as follows: four pipes (primary) come off the cylinder head , and merge into two pipes (secondary), which in turn finally link up to form one collector pipe.
Valvetronic system of the BMW N52 engine. The Valvetronic system is a BMW variable valve lift system [1] which, in combination with VANOS, allows infinite adjustment of the intake valve timing and lift. [2] [3] The system claims to improve fuel economy and emissions, and negates the need for a throttle body in regular use. [4]
It is based on the DOHC version of the BMW M49 engine, which was used in the BMW 3.0CSi racing cars. [1] [2] [3] The M88 was produced alongside the BMW M30 engine, as the higher performance engine. In North America up until 1989, the BMW S38 engine was used instead of the M88. In 1989, an updated version of the S38 became the worldwide ...
Again in 1996, Alpina introduced the B3 3.2, following the S50 engine's upgrade to 3.2 litres. With the new 3.2 models, Alpinas were now based on the 328i and its 2.8L engine, rather than 325i models. [27] Alpina B3 3.2. In 1995, the B8 was released. The B8 4.6 was based on the 4 litre V8 from the E34 5-series, put in to a 328i-based shell.
The S38 is based on the M88/3 engine. [3] Compared to the M88/3, the S38 has a lower compression ratio (9.8:1), simplified exhaust manifold, catalytic converter, dual-row timing chain and a shorter camshaft duration. [4] As per the M88/3, the S38 uses a DOHC valvetrain with shim-and-bucket valve actuation. [5]