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| {{Engine Infobox |
| | #REDIRECT [[BMW S85 engine]] |
| |Image = [[Image:250px-BMW S85B50 Engine.JPG|300px]]
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| |Engine Name = BMW S85
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| |Manufacturer = [[BMW]]
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| |aka = '''Type aka here, not up there'''
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| |Type = '''Note what type of fuel it consumes'''
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| |Production/Introduction = '''produced/introduced from when to when'''
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| |Status = '''Note if it is''' "''In Production''", "''In Development''", a "''Concept Only''", "''Stillborn''" or "''Discontinued''"
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| |Displacement = '''in litres, cc's or cu-in.'''
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| |Aspiration = '''write its type of aspiration'''
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| |Configuration = V
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| |Cylinders = 10
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| |Fuel System = '''write if it is injected or carburated and the system used'''
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| |Lubrification = '''indicate the engine's type of lubrification'''
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| |Output = N/A hp @ N/A rpm<br>N/A lb-ft. of [[torque]] @ N/A rpm
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| |Bore = '''in inches'''
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| |Stroke = '''in inches'''
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| |Compression = '''write compression ratio here'''
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| |In. Valves = '''in inches'''
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| |Ex. Valves = '''in inches'''
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| |Firing Order = '''Firing order of cylinders'''
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| |Left Bank = '''Write which cylinders are in this bank (write N/A if it it is inline)'''
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| |Right Bank = '''''(same as above)'''''
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| |Length = '''in inches'''
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| |Diameter = '''in inches'''
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| |Width = '''in inches'''
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| |Height = '''in inches'''
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| |Dry Weight = '''lbs. / kg.'''
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| |Fuel Consumption = '''city/highway (mpg & km/L)'''
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| |CO = g/km
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| |CO2 = g/km
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| |NOx = g/km
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| |Hydrocarbon = g/km
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| |Particulate = g/km
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| |Chief Engineer = '''write here'''
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| }}
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| The [[BMW]] '''S85B50''' is a [[DOHC]] 40-valve [[V10 engine|V10]] automotive [[piston]] [[engine]] found on the [[BMW E60|E60]] [[BMW M5|M5]] and [[BMW E63|E63]] [[BMW M6|M6]]. It was inspired by BMW's formula 1 racing division.
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| The 2008 [[Wiesmann GT MF 5]] will also have the BMW S85 V10 Engine.
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| ===Photos===
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| <gallery>
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| </gallery>
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| ==Unique Attributes==
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| The S85B50 is a high-revving engine designed to utilize power from a wide rev band. Having a redline of 8250 rpm, it achieves over 100 bhp (70 kW)/litre and features a very high compression ratio of 12.0:1, beating the previous M3 of 11.5:1
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| *5.0 Litre V10 engine, 507 hp (378 kW) @ 7750rpm/520 N·m (384 ft·lbf) torque @ 6100rpm
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| *Cast aluminum block with bed plate design split at the crankshaft axis.
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| *Cast aluminum heads with four valves per cylinder and CNC machined ports and combustion chambers. Valves are actuated though non-rotating inverted bucked cam followers.
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| *Oil cooled forged aluminum pistons from Mahle Motorsport
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| *Forged steel crankshaft with counterweights
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| *Double [[VANOS]] system which varies both intake and exhaust cam phasing
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| *10 individual electronically controlled throttles
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| *Knock sensors have been eliminated by utilizing the "ionic current" measuring system. Using the ionic current system, engine misfires as well as knock can be measured simultaneously. Combustion quality raises or lowers cylinder pressure. The ionic current is measured by passing a low voltage across the spark plugs immediately following the ignition spark.
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| *Quasi-dry sump lubricating system
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| *The Digital Motor Electronic (DME) of the S85B50 is encrypted heavily to prevent modifications/hacking to the software.
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| ==Criticisms==
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| Please make sure to '''''keep critiques in a third-person point of view'''''. If using criticisms from a reputable automotive source, then '''''please make sure to cite the quote'''''.
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| ==Worldwide==
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| If the [[automobile|vehicle]] is sold in other markets worldwide, then this is the section to mention that information. Also, mention if the <MODEL> goes by another name in these other markets.
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| ==Design quirks and oddities==
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| Refer to any pop-culture tidbits about the [[Automobile|vehicle]] in this section.
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| ==Awards==
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| In 2005, the first year that it was nominated, the S85B50 won four different [[International Engine of the Year]] awards in the following 4 categories:
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| # International Engine of the Year, BMW 5.0 Litre V10 (M5,M6)
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| # Best Performance Engine
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| # Best New Engine
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| # Best Above 4.0 Litre
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| In 2006 the S85B50 again won several [[International Engine of the Year]] awards, winning in the following 3 categories:
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| # International Engine of the Year, BMW 5.0 Litre V10 (M5,M6)
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| # Best Performance Engine
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| # Best Above 4.0 Litre
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| In 2007 the S85B50 again won several [[International Engine of the Year]] awards, winning in the following 2 categories:
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| # Best Performance Engine
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| # Best Above 4.0 Litre
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| ==See also==
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| * [[List of BMW engines]]
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| * [[BMW M5]]
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| * [[BMW M6]]
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| {{BMW}}
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| ==External Links==
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| Please include any external sites that were used in collaborating this data, including manufacturer sites, in this section.
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| [[Category:BMW engines|S85]]
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| [[Category:Engines]]
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