View source for BMW P60B40

{{Infobox automobile engine
|name=BMW P60B40 engine
|manufacturer=[[BMW M GmbH]]
|image= Touring race engine P60 B40 in BMW-Museum in Munich, Bayern.JPG
|production=2001&ndash;2005
|configuration=[[Naturally aspirated]] 90° [[V8 engine|V8]]
|displacement={{convert|3997|cc|L cuin|1|abbr=on|order=flip}}
|power={{Convert|650-700|bhp|kW PS|0|abbr=on}} (M3 GTR race car; unrestricted)<ref>{{Cite web|url=https://www.bimmerforums.com/forum/showthread.php?211551-M3-GTR-Engine|title=M3 GTR Engine?|website=Bimmerforums - The Ultimate BMW Forum}}</ref><br>{{Convert|444-500|bhp|kW PS|0|abbr=on}} (M3 GTR race car; using 2x {{cvt|30.4|mm|in|1|abbr=on}} [[Restrictor plate|air intake restrictors]])<ref>{{Cite web|url=https://www.carthrottle.com/post/5669578/|title=Victim of complaints - 2001 BMW E46 M3 GTR GT2.|website=Car Throttle}}</ref><ref>{{Cite web|url=https://www.autosport.com/gt/news/air-restrictor-squeeze-for-bmw-5050234/5050234/|title=Air restrictor squeeze for BMW|website=www.autosport.com}}</ref><ref>{{Cite web|url=https://www.yumpu.com/en/document/view/5718944/bmw-m3-gtr-e46-motorsports-almanac|title=BMW M3 GTR E46 - Motorsports Almanac|website=yumpu.com}}</ref><br>{{Convert|380|bhp|kW PS|0|abbr=on}} (M3 GTR Straßen Version)
|specpower={{Convert|{{#expr:444/3.997 round 1}}|bhp|kW PS|1|abbr=on}}
|torque={{Convert|380-670|Nm|lbft|0|abbr=on}}
|bore={{Convert|94|mm|2|abbr=on}}
|stroke={{Convert|72|mm|2|abbr=on}}
|valvetrain=[[DOHC]] [[Multi-valve#Four valves|4 valves]] x cyl.
|management=[[BMW Motorsport]]
|fueltype=[[Petrol engine|Gasoline]]
|fuelsystem=[[Multi-port fuel injection]]
|coolingsystem=[[Radiator (engine cooling)|Water-cooled]]
|oilsystem=[[Dry sump]]
|block=Aluminium
|head=Aluminium
|compression=12.0:1
}}
The '''P60B40''' is a [[naturally aspirated]] [[DOHC]] [[V8 engine]], designed, developed and produced by [[BMW]], for [[sports car racing]], between 2001 and 2005.
== Usage ==
===M3 GTR===
{{Main article|BMW M3#Motorsport 3}}
The P60B40 was the powertrain for the [[BMW 3 Series (E46)|BMW E46]] [[BMW M3#M3 GTR 2|M3 GTR]] from 2001 to 2005. The BMW M3 GTR competed in the [[Group GT2#History|GT Class]] of the [[American Le Mans Series]] in 2001.
There was opposition to the car being allowed to race, rivals stated that the car was a prototype as a road going version was not available to buy. As a result of the complaints, the regulations were modified for the 2001 [[Le Mans 24-hour race]] (and the American Le Mans Series), stating that a car had to be for sale on two continents within twelve months of the rules being issued. BMW complied (leading to the M3 GTR Road Version), however, the ALMS rules were modified again in 2002 to state that there must a be a minimum of 100 cars and 1,000 engines built in order for a car to compete without penalties. BMW made the decision to pull the car rather than meet the requirements or race with the penalties, ending production of the E46 M3 GTR and the P60B40 along with it.
===M3 GTR road version===
{{Main article|BMW M3#GTR road car}}
In order for the M3 GTR race car to compete in the American Le Mans Series, BMW produced 10 examples of the "M3 GTR Straßen Version" road car in 2001.<ref>{{cite web|title=BMW M3 GTR Strassen Version|url=http://www.ultimatecarpage.com/car/960/BMW-M3-GTR-Strassen-Version.html|website=www.ultimatecarpage.com|accessdate=18 February 2017}}</ref> As per the race M3 GTR, the roadgoing Version was powered by the BMW P60B40 4.0&nbsp;L V8 engine. The P60B40 was detuned for the road version from {{convert|444|bhp|kW PS|0|abbr=on}} to {{Convert|380|bhp|kW PS|0|abbr=on}}.
== Specifications ==
[[4-stroke]], [[Longitudinal engine|longitudinally-mounted]] [[FR layout]] [[File:BMW P60 B40.jpg|thumbnail|P60B40 on display at the BMW Museum]]
Power: {{convert|444|bhp|kW PS|0|abbr=on}} @&nbsp;7,500&nbsp;rpm (M3 GTR race car), {{Convert|380|bhp|kW PS|0|abbr=on}} (M3 GTR Straßen Version)
Torque: {{convert|480|Nm|lbft|0|abbr=on}} @&nbsp;5,500&nbsp;rpm
5 [[main bearing]]s, [[flat-plane crank]]shaft
[[Firing order]]: 1-8-3-6-4-5-2-7
==References==
<references />
==External links==
*[http://commons.wikimedia.org/wiki/File:BMW_P60_B40.jpg Image - Engine Display] - P60B40 on display at the BMW Museum
[[Category:BMW engines|P60B40]]
[[Category:V8 engines]]
[[Category:Gasoline engines by model]]
[[Category:Controversial racing cars]]