S50 MPower 3.0L 6 Cylinder Built 1992 to 2001
The S50 is higher performance version of the M50 which was used in the M3. Like the M50, it has an iron block and aluminum head with four valves per cylinder.
Upgrades over the M50 include-
Individual throttle plates for each cylinder
Continuously variable "Vanos" valve timing.
Larger inlet valves
Redesigned equal length exhaust manifolds
The S50B30 is a 2,990 cc (182 cu in) higher output version of the M50 which powered the E36 M3 (except in the USA. Canada had a limited production run of 45 cars with the S50B30 engine). Engine management is provided by a Bosch Motronic M3.3 ECU with a separate "VNC" Vanos control unit providing fully variable single camshaft adjustment on the intake side. It produces 210 kW (282 hp), has a bore of 86 millimetres (3.4 in) and a stroke of 86 millimetres (3.4 in), and a compression ratio of 10.8:1. The limited edition "M3 GT" model from 1995 had different camshafts and a redesigned sump and oil pump, and produced 216 kW (294 PS; 290 hp) .
1992-1996 E36 M3 (USA)
S50 (US market)
The E36 M3 for USA is powered by a 3.0L tuned version of the M50 which produced 240 hp (179 kW). This engine was based on the M50TU out of the 325 but was bored out to yield greater displacement and utilized the same cylinder head but with more aggressive cams and valvetrain.
1992 - 1999 E36 M3 M3 (USA only)
1996-1999 Z3 M coupe and M roadster
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