Cadillac LMC55R engine

Last updated

Cadillac LMC55R engine
Overview
Manufacturer Cadillac
Production2023-present
Layout
Configuration 90° V8
Displacement 5.5 L (5,463 cc)
Cylinder bore 104.25 mm (4.104 in)
Piston stroke 80 mm (3.1 in)
Cylinder block materialAluminium alloy
Cylinder head materialAluminium alloy
Valvetrain 32-valve (four-valves per cylinder), DOHC
RPM range
Max. engine speed 8,800
Combustion
Fuel system Gasoline direct injection
Management Bosch Motronic MS7 ECU
Fuel type TotalEnergies (WEC)
VP Racing Fuels (IMSA)
Oil system Dry sump
Output
Power output 670  hp (500  kW; 679  PS)
Dimensions
Length25.2  in (640  mm)
Dry weight 396.8  lb (180  kg)

The Cadillac LMC55Rengine is a naturally aspirated, four-stroke, 5.5-liter, V8 racing engine, made by GM Racing and Performance Center team for use in their Cadillac V-Series.R LMDh race car, since 2023. [1] [2]

Contents

Design

Cadillac developed the bespoke cross-plane engine for their 2023 Cadillac V-Series.R and is the first naturally aspirated engine of the LMDh manufacturers. [3] [4] In accordance with the LMDh rules, the LMC55R internal combustion engine is connected to the standardized hybrid drivetrain components provided by Bosch (motor generator unit), Williams Advanced Engineering (battery pack), and an Xtrac P1359 gearbox. [5] [6]

Applications

References

  1. Perkins, Chris (July 28, 2023). "Cadillac's Big Naturally Aspirated Race V-8 Is a Monster In a World of Small Turbo Engines". Road & Track. Retrieved April 18, 2025.
  2. "V-SERIES.R RACE CAR". www.cadillac.com. Archived from the original on April 9, 2025. Retrieved April 18, 2025.
  3. Lopez, Jonathan (August 13, 2023). "Here's A Look At The Cadillac LMC55.R V8 Engine" . Retrieved April 18, 2025.
  4. "Wayne Taylor Racing". waynetaylorracing.com. Archived from the original on January 16, 2025. Retrieved April 18, 2025.
  5. Newbold, James (December 18, 2022). "Inside the spec hybrid spine of LMDh cars". Archived from the original on January 14, 2025. Retrieved April 18, 2025.
  6. Goodwin, Graham (July 8, 2022). "Cadillac Shake Down New LMDh Racer". www.dailysportscar.com. Retrieved April 18, 2025.