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 | BMW S50 |
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] The successor to the S14 is the S50 six-cylinder engine (since it was used in the following M3).
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) .[3]
Applications:
- 1987-1990 E30 320iS (Italy and Portugal only)
S14B23
The E30 M3 was initially released with the 147 kW 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.[citation needed] Larger diameter exhaust header tubes are used.[citation needed]
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 BHP). [4] Higher lift intake and exhaust camshafts were used.[citation needed] Applications:
- 1989-1990 E30 M3
References
- ^ a b "BMW World - BMW S14 Engine". Usautoparts.net. Archived from the original on 2012-03-29. Retrieved 2012-06-03.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ a b "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.
- ^ a b c d "BMW Heaven Specification Database | Engine specifications for Motorsport engines". Bmwheaven.com. Retrieved 2012-06-03.
