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Kippenvel. Sommigen krijgen het van de kou, anderen van muziek. Maar ik? Ik krijg van misschien wel het belangrijkste aspect van een sportwagen: motorgeluid. En geen symfonie mooier dan die van BMW’s M88 zoals eerst gemonteerd in de M1 Procar en later in de 635CSI, E28 M5, E34 M5 etc. De muziekvideo in bijlage is van zo’n M1 die – in racetrim – goed is voor 470 tot 490pk en een geluid om voor te sterven. Speakers op burenruzie!

The BMW M88/3 is an in line 6 cylinder (I6) piston engine. It was based on the M88/1 that was used in the BMW M1’s street version, with double overhead cam and four valves per cylinder. The M88/1 was in turn based on the M49 engine which was used in the BMW 3.0CSi. The M88/3 was used in the early BMW M635CSi/”M6″ and BMW M5 (E28) and produced 286 PS (210 kW/282 hp).

BMW engineers used a 4-valve head and a single-row chain. The cylinder head was made in two parts. The lower part formed the combustion chambers and water jackets, and the upper half contained the camshaft bearings and the bores for the tappets.

Kugelfischer fuel injection was used with individual throttle valves and the distinctive six inlet pipes. The M88 produced 277 bhp in the version built from 1978 to 1981 for the BMW M1.

For the Procar M1’s, the M88 was tuned to 470 to 490 bhp. The resulting M88/1 engine had new camshafts, bigger valves, reshaped ports, forged pistons, use of throttle slides (instead of butterfly valves), and improved exhaust.

For Group 5 racing, the engine was pushed to between 850 and 900 bhp by the addition of two turbochargers. This was the M88/2 powerplant.

From 1985 to 1987 the M88 was used in the European-market 5 Series M5 (E28) and from 1983 to 1989 in the 6 Series M635CSi Coupe (E24). The engine was designated M88/3 and produced 286 bhp. [Wikipedia]