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BMW S65

FieldValue
nameBMW S65 Engine
image2009 BMW M3 Cabriolet - Flickr - The Car Spy (16).jpg
captionS65B40 in a E93 M3
manufacturerGermany BMW
production2007–2013
{{convert3999ccL1orderflipabbr=on}}
4361 cc
configuration90° V8
bore92 mm
stroke75.2 mm
82 mm
valvetrainDOHC w/ VVT
blockAluminium
headAluminium
fuelsystemElectronic multi-point fuel injection
fueltypePetrol
oilsystemWet sump
predecessorBMW S62
successorBMW S63

3999 cc 4361 cc 82 mm

The BMW S65 is a naturally aspirated V8 petrol engine which was produced from 2007 to 2013. Its main use was in the BMW M3 (where it replaced the BMW S54 straight-six engine). There is no direct replacement for the S65, since the following generation of M3 switched to a turbocharged straight-six engine (the BMW S55).

Derived from the BMW S85 V10 engine (as used in the E60 M5), the S65 shares the same basic architecture and aluminium construction. Unlike most other BMW M engines, the S65 and S85 are not related to a regular production BMW engine.

The S65 won the International Engine of the Year award for the 3.0 to 4.0 L category in 2008, 2009, 2010, 2011 and 2012.

TOC

Design

The S65 shares the same cylinder dimensions with the S85 V10, with a 92 mm bore and a 75.2 mm stroke. Other common features include individual throttle bodies, ionic current knock sensing, double-VANOS (variable valve timing) and the 12.0:1 compression ratio. The redline is 8,400 rpm.

To reduce weight, a wet-sump lubrication system with two electrically operated scavenging pumps and a main oil pump replaces the three-pump wet-sump system used on the S85. The dry weight of the S65 is 202 kg.

The alternator reduces or stops charging (depending on battery charge level) during acceleration to maximise power, only fully charging the battery during braking and decelerating whenever possible, in a system BMW calls Brake Energy Regeneration.

The engine control unit (ECU/DME) is a Siemens MSS60, which is based on the Siemens MSS65 ECU used in the S85 engine The S65 weighs 202 kg, which is 15 kg less than its S54 straight-6 engine predecessor.

The firing order for the S65 engine is 1-5-4-8-7-2-6-3, which is different from the typical BMW V8 firing order of 1-5-4-8-6-3-7-2.

Versions

EngineDisplacementPowerTorqueYear
S65B403999 cc309 kW
at 8,300 rpm400 Nm
at 3,900 rpm2007
S65B444361 cc331 kW
at 8,300 rpm440 Nm
at 3,750 rpm2010

S65B40

The S65B40 has a bore of 92 mm and a stroke of 75.2 mm.

Applications:

  • 2008-2013 BMW E90/92/93 M3
  • 2009-2014 Wiesmann MF4-S

S65B44

The S65B44 is an enlarged version of the S65, due to a larger stroke of 82 mm. It also uses a lightweight titanium exhaust.

Applications:

  • 2010-2011 BMW E92 M3 GTS
  • 2011-2012 BMW E90 M3 CRT sedan

P65

The P65 engine is used for motor racing. Main article: BMW P65 engine

Applications:

P65B40

  • 2008 BMW M3 ALMS
  • 2009 BMW M3 GT2 racing car

P65B44

  • 2010-2015 BMW Z4 GT3 racing car
  • 2013-2016 BMW Z4 GTE racing car

References

References

  1. "2006 BMW M5 - First Drive Review".
  2. "Archive".
  3. (April 2007). "The New BMW M3". BMW Media Information.
  4. (5 April 2016). "2010 BMW M3 GTS".
  5. "Engine specifications for motorsport engines".
  6. "S65 oil pressure values".
  7. "BMW S85 V10 and S65 V8 Engines".
  8. (April 2007). "The new BMW M3".
  9. "BMW M3 V8".
  10. "3' E92 M3 Basic control unit DME / MSS60".
  11. "BMW S65 engine".
  12. (July 2007). "Aftersales Training - Product Information. E92 M3 Complete vehicle". BMW Service.
  13. (2007-04-01). "The new BMW M3". [[BMW]] USA.
  14. "Aftersales Training - Product Information. E92 M3 Complete vehicle".
  15. "FAQ E90 + E92 + E93 M3".
  16. Kable, Greg. (8 July 2010). "2010 BMW M3 GTS, an AW Flash Drive". Hearst Autos, Inc..
  17. "New BMW M3 GTS with a larger 4.4L V8".
  18. (23 June 2011). "2012 BMW M3 CRT".
  19. "2012 BMW M3 CRT Lightweight Sedan".
  20. (February 2008). "BMW M3 ALMS Racer".
  21. (July 2025). "Photos: BMW M3 GTR".
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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