BMW P48 Turbo

The BMW P48 Turbo is a mass-produced four-stroke 2.0-litre single-turbocharged inline-4 racing engine, developed and produced by BMW Motorsport for Deutsche Tourenwagen Masters. The P48 Turbo engine is commonly based on BMW B48 road car engine. BMW P48 Turbo is the first-ever turbocharged DTM engine to date, replacing the aging BMW P66 Series (P66/1) V8 engine after seven-years of service and conform the "Class One" regulations that shared with Japanese Super GT. BMW P48 Turbo engine currently competes with engine competitors Audi RC8 2.0 TFSI and HWA AFR Turbo 2.0.

BMW P48 Turbo
Overview
ManufacturerBMW Motorsport
Production2019-present
Layout
ConfigurationInline-4
Displacement2.0 L (122 cu in)
Cylinder bore86–90 mm (3.39–3.54 in)
Piston strokeFree but typically approximately between 86–90 mm (3.39–3.54 in)
Block materialDie cast steel or aluminium alloy. Machining process from a solid is not permitted
Head materialDie cast steel or aluminium alloy
ValvetrainDOHC 16-valve (four-valves per cylinder)
Compression ratio15:1
Combustion
TurbochargerSingle-turbocharged by Garrett Advancing Motion. 3.5 bar (51 psi) of turbo boost
Fuel systemBosch central high-pressure gasoline direct fuel injection. One direct injector per cylinder fed by an engine-driven high-pressure fuel pump
ManagementBosch Motronic MS 7.4
Fuel typeAral Ultimate 102 RON unleaded racing gasoline
Oil systemDry sump. Shell Helix Ultra
Cooling systemSingle mechanical water pump feeding a single-sided cooling system
Output
Power output610 + 30 hp (455 + 22 kW) (2019) later 610 + 60 hp (455 + 45 kW) (2020-present)[1] including push-to-pass
Torque outputApprox. 650 N⋅m (479 ft⋅lbf) @ 9,000 rpm
Dimensions
Length600 mm (23.62 in)
Width697 mm (27.44 in)
Height693 mm (27.28 in)
Dry weight187 lb (85 kg) including turbocharger
Chronology
PredecessorBMW P66 Series (V8)

Début and public unveil

The BMW P48 Turbo engine was made a first shakedown début fitted with BMW M4 Turbo DTM car on 27 October 2018 at near BMW headquarters in Munich, Germany in the hands of Bruno Spengler.[2] The BMW P48 Turbo engine was publicly unveiled on 25 April 2019 including comparison with first BMW 2002 Turbo engine[3] and made an official race début on 3 May 2019 at Hockenheimring.

Construction

The P48 Turbo engine consists of approximately 2,000 individual parts. The engine's valve acceleration is 2,000 times faster than gravitational acceleration, or 400 times faster than the acceleration of a lunar rocket. The pistons in the BMW P48 Turbo accelerate from 0 to 100 km/h in less than a thousandth of a second – 1,200 times faster than a lunar rocket. Between them, all of the pistons in the engine cover a distance the equivalent of Munich to Cape Town over the course of a season. 2.8 million ignition sparks are generated in an engine over the course of a season. The water pump consumes roughly 18,000 litres in an hour. At this rate, it would fill a bathtub in 20 seconds. The full 600 hp of engine power is transferred to the drivetrain and rear wheels through screws. They weigh just 130 grams – the same as an cube of iron with a 2.5-mm edge. Over the course of a season, over 65.000 litres of oil are pumped through the engine. During a season, enough heat for 500 sauna sessions is dissipated through the oil. For the engine's final assembly unit, 1,005 designs were drawn up. Placed side by side, they could cover the floor in a 250 m² apartment. In the interest of sustainability, these drawings were not printed, but were saved as PDF documents.

Applications
gollark: Anyway, I have, I think, reasonably strong "no genocide" ethics. But I don't know if, in a situation where everyone seemed implicitly/explicitly okay with helping with genocides, and where I feared that I would be punished if I either didn't help in some way or didn't appear supportive of helping, I would actually stick to this, since I don't think I've ever been in an environment with those sorts of pressures.
gollark: Maybe I should try arbitrarily increasing the confusion via recursion.
gollark: If people are randomly assigned (after initial mental development and such) to an environment where they're much more likely to do bad things, and one where they aren't, then it seems unreasonable to call people who are otherwise the same worse from being in the likely-to-do-bad-things environment.I suppose you could argue that how "good" you are is more about the change in probability between environments/the probability of a given real world environment being one which causes you to do bad things. But we can't check those with current technology.
gollark: I think you can think about it from a "veil of ignorance" angle too.
gollark: As far as I know, most moral standards are in favor of judging people by moral choices. Your environment is not entirely a choice.

References
  1. Haidinger, Sven (26 December 2019). "DTM-Hersteller einig: Push-to-pass 2020 doppelt so stark, mehr Freiheit bei DRS". motorsport-total.com (in German). Motorsport Total GmbH. Retrieved 26 December 2019.
  2. "2019 BMW M4 DTM will get a 2.0 liter turbo engine". bmwblog.com. 27 October 2018. Retrieved 27 October 2018.
  3. "New BMW DTM Engine shows off its Turbo Power Roots". bmwblog.com. 25 April 2019. Retrieved 25 April 2019.
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