BMW S65 explained

BMW S65 engine
Manufacturer: BMW
Production:2007 - 2013
Displacement:3999cc
4361cc
Configuration:90° V8
Bore:92mm
Stroke:75.2mm
82mm
Valvetrain:DOHC w/ VVT
Block:Aluminium
Head:Aluminium
Fuelsystem:Electronic multi-point fuel injection
Fueltype:Petrol
Oilsystem:Wet sump
Predecessor:BMW S62
Successor:BMW S63

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.[1]

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.[2]

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Design

The S65 shares the same cylinder dimensions with the S85 V10, with a 921NaN1 bore and a 75.21NaN1 stroke. Other common features include individual throttle bodies,[3] ionic current knock sensing,[4] double-VANOS (variable valve timing) and the 12.0:1 compression ratio.[5] 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.[6] [7] The dry weight of the S65 is 2020NaN0.[8]

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.[9]

The engine control unit (ECU/DME) is a Siemens MSS60,[10] [11] which is based on the Siemens MSS65 ECU used in the S85 engine[12] The S65 weighs 2020NaN0, which is 150NaN0 less than its S54 straight-6 engine predecessor.[13]

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.[14]

Versions

EngineDisplacementPowerTorque Year
S65B4039991NaN13090NaN0
at 8,300 rpm 		4000NaN0
at 3,900 rpm 		2007
S65B4443611NaN13310NaN0
at 8,300 rpm 		4400NaN0
at 3,750 rpm 		2010

S65B40

The S65B40 has a bore of 921NaN1 and a stroke of 75.21NaN1.

Applications:

S65B44

The S65B44 is an enlarged version of the S65, due to a larger stroke of 822NaN2.[15] It also uses a lightweight titanium exhaust.[16]

Applications:

P65

The P65 engine is used for motor racing.

See main article: BMW P65 engine.

Applications:

P65B40

P65B44

See also

Notes and References

  1. Web site: 2006 BMW M5 - First Drive Review. www.caranddriver. 23 February 2012. 6 September 2011. https://web.archive.org/web/20110906085514/http://www.caranddriver.com/reviews/car/04q4/2006_bmw_m5-first_drive_review. live.
  2. Web site: Archive. www.ukimediaevents.com. 18 August 2017. 3 December 2017. https://web.archive.org/web/20171203104238/http://www.ukimediaevents.com/engineoftheyear/archive.php. live.
  3. Book: The New BMW M3. April 2007. BMW Media Information. 18 August 2017. 18 August 2017. https://web.archive.org/web/20170818214100/http://www.e90fanatics.com/. live.
  4. Web site: 2010 BMW M3 GTS. www.supercars.net. 18 August 2017.
  5. Web site: Engine specifications for motorsport engines. www.bmwheaven.com. 17 August 2017. 13 August 2014. https://web.archive.org/web/20140813091652/http://www.bmwheaven.com/database/engine.php?type=Motorsport#/204. live.
  6. Web site: S65 oil pressure values. www.m3post.com. 18 August 2017. 17 August 2017. https://web.archive.org/web/20170817164223/http://www.m3post.com/forums/showthread.php?t=857984. live.
  7. Web site: BMW S85 V10 and S65 V8 Engines. www.unixnerd.demon.co.uk. 18 August 2017. 23 January 2016. https://web.archive.org/web/20160123155204/http://www.unixnerd.demon.co.uk/s85.html. dead.
  8. The new BMW M3. April 2007. 7. 6 October 2007. dead. https://web.archive.org/web/20071006075329/https://www.bmwusa.com/NR/rdonlyres/E2DF8A41-714F-4846-9066-E558310AB8D8/0/070405_The_new_BMW_M3.pdf.
  9. Web site: BMW M3 V8 . www.kenrockwell.com . 2007-04-29. https://web.archive.org/web/20070506160940/http://kenrockwell.com/bmw/m3/2007/engine.htm. 6 May 2007 . live.
  10. Web site: 3' E92 M3 Basic control unit DME / MSS60. www.realoem.com. 18 August 2017. 18 August 2017. https://web.archive.org/web/20170818175428/http://www.realoem.com/bmw/en/showparts?id=WD92-EUR-02-2007-E92-BMW-M3&diagId=12_1436. live.
  11. Web site: BMW S65 engine. www.australiancar.reviews. 18 August 2017. 22 September 2016. https://web.archive.org/web/20160922063915/http://australiancar.reviews/bmw_S65.php. live.
  12. Book: Aftersales Training - Product Information. E92 M3 Complete vehicle. July 2007. BMW Service. 18 August 2017. 28 February 2021. https://web.archive.org/web/20210228091059/http://www.drivingenthusiast.net/sec-bmw/products/m3_e92/training/M3E92-dealer-training.pdf. live.
  13. Web site: 2007-04-01 . The new BMW M3 . BMW USA . 2007-04-29 . https://web.archive.org/web/20071006075329/http://www.bmwusa.com/NR/rdonlyres/E2DF8A41-714F-4846-9066-E558310AB8D8/0/070405_The_new_BMW_M3.pdf . 2007-10-06 . dead .
  14. Web site: Aftersales Training - Product Information. E92 M3 Complete vehicle. www.bimmerfest.com. 22 February 2018. 3 March 2016. https://web.archive.org/web/20160303193406/http://www.bimmerfest.com/pdf/BMW-M3-Aftersales-Training--Information.pdf. dead.
  15. Web site: FAQ E90 + E92 + E93 M3. www.bmwmregistry.com. 15 August 2017. 22 October 2016. https://web.archive.org/web/20161022013141/http://www.bmwmregistry.com/model_faq.php?id=50. live.
  16. Web site: 2010 BMW M3 GTS, an AW Flash Drive. Greg . Kable . www.autoweek.com. 8 July 2010 . 15 August 2017. https://web.archive.org/web/20170815190140/http://autoweek.com/article/car-reviews/2010-bmw-m3-gts-aw-flash-drive. Hearst Autos, Inc. . live.
  17. Web site: New BMW M3 GTS with a larger 4.4L V8 . www.paultan.org . 18 June 2011 . 24 February 2012 . https://web.archive.org/web/20120224022137/http://paultan.org/2009/11/06/new-bmw-m3-gts-with-larger-4-4l-v8/ . live .
  18. Web site: 2012 BMW M3 CRT. www.topspeed.com. 15 August 2017. 6 October 2021. https://web.archive.org/web/20211006191103/https://www.topspeed.com/cars/bmw/2012-bmw-m3-crt-ar111725.html. live.
  19. Web site: 2012 BMW M3 CRT Lightweight Sedan. www.caranddriver.com. 15 August 2017. 15 August 2017. https://web.archive.org/web/20170815181812/http://www.caranddriver.com/news/2012-bmw-m3-crt-lightweight-sedan-news. live.
  20. Web site: BMW M3 ALMS Racer. www.superstreetonline.com. 15 August 2017. 15 August 2017. https://web.archive.org/web/20170815180944/http://www.superstreetonline.com/features/news/eurp-0802-bmw-m3-alms-racer/. live.
  21. Web site: Photos: BMW M3 GTR. www.bmwblog.com. 15 August 2017.

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