BMW S14

BMW S14
BMW S14
	BMW S14 in an E30 M3
Overview
Manufacturer	BMW
Production	1986-1990
Layout
Configuration	DOHC straight-4
Chronology
Predecessor	None
Successor	None

The BMW S14 is a straight-4 DOHC piston engine which was used in the E30 M3. It is based on the M10 block and the M88 head with two cylinders removed.^[1] There is no direct successor to the S14, however the following generation of M3 is powered by the BMW S50 straight-six engine.

Two separate throttle bodies are used, each incorporating two throttle butterfly plates.^[2]

Models

Engine	Displacement	Power	Torque	Redline	Year
S14B20	1990 cc	141 kW (192 PS; 189 hp) @ 6900	210 N⋅m (155 lb⋅ft) @ 4900	7300	1987-1990
S14B23	2303 cc	147 kW (200 PS; 197 hp) @ 6750	240 N⋅m (177 lb⋅ft) @ 4750		1986-1990
S14B23 EVO2	2302 cc	162 kW (220 PS; 217 hp) @ 6750	245 N⋅m (181 lb⋅ft) @ 4750		1988-1990
S14B25 EVO3	2467 cc	175 kW (238 PS; 235 hp) @ 7000	240 N⋅m (177 lb⋅ft) @ 4750		1989-1990

S14B20

This version was only sold in Portugal and Italy.^[2] It has a 1990 cc capacity (achieved by shortening the stroke to 72.6 mm)^[1] and produces 141 kW (192 PS; 189 hp) .^[3]

Applications:

1987-1990 E30 320iS (Italy and Portugal only)

S14B23

The E30 M3 was initially released with the 147 kW (200 PS; 197 hp);S14B23.^[4] Versions equipped with a catalytic converter produced 143 kW (194 PS; 192 hp) and 230 Nm.^[4]

Applications:

1986-1990 E30 M3

S14B23 EVO2

This update of the S14B23 produced 162 kW (220 PS; 217 hp), or 158 kW (215 PS; 212 hp) if equipped with a catalytic converter.^[4] Changes include a revised intake camshaft profile and modified exhaust camshaft timing, increased compression, and a more efficient cylinder head intake port design. Larger diameter exhaust header tubes are used.

Applications:

1988-1990 E30 M3

S14B25 EVO3

In 1989, the displacement was enlarged to 2467 cc and this engine produced 175 kW (238 PS; 235 hp). ^[4] Higher lift intake and exhaust camshafts were used. Applications:

1989-1990 E30 M3

References

1 2 "BMW World - BMW S14 Engine". Usautoparts.net. Archived from the original on 2012-03-29. Retrieved 2012-06-03.
1 2 "FAQ E30 320is (S14)". BMW M Registry. Retrieved 2012-06-03.
↑ "Euro E30 320iS – Italian M3 | BMWE21.net – Jeroen's BMW E21 Network". Bmwe21.net. Retrieved 2012-06-03.
1 2 3 4 "BMW Heaven Specification Database | Engine specifications for Motorsport engines". Bmwheaven.com. Retrieved 2012-06-03.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[bmwworld-1] 1 2 "BMW World - BMW S14 Engine". Usautoparts.net. Archived from the original on 2012-03-29. Retrieved 2012-06-03.

[bmwmregistry1-2] 1 2 "FAQ E30 320is (S14)". BMW M Registry. Retrieved 2012-06-03.

[3] "Euro E30 320iS – Italian M3 | BMWE21.net – Jeroen's BMW E21 Network". Bmwe21.net. Retrieved 2012-06-03.

[bmwheaven-4] 1 2 3 4 "BMW Heaven Specification Database | Engine specifications for Motorsport engines". Bmwheaven.com. Retrieved 2012-06-03.

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