Duesenberg straight-8 engine

Last updated
Duesenberg straight 8
Overview
Manufacturer Duesenberg/Lycoming
Production1921–1937
Layout
Configuration Overhead cam multivalve overhead valve straight-8 engine

The Duesenberg straight-8 engine was produced from 1921 to 1937 and sold in Duesenberg automobiles. Fred and August Duesenberg got their start building experimental racing engines which achieved a great deal of success. Among their accomplishments are wins at the Indianapolis 500, the 1921 French Grand Prix and speed records at the Bonneville Salt Flats. They used the expertise they had gained to start building production engines and cars which were renowned for their performance and luxury.

Contents

Among the novel design features (for a pre-1940 production engine) seen on various Duesenberg engines are single- and double-overhead camshafts, three- and four-valve heads, superchargers and aluminum castings.

Production engines

Duesenberg Model J engine [1]
Model J engine.JPG
Overview
Manufacturer Duesenberg
Production1928-1937
Layout
Configuration Straight-eight engine
Displacement 420 cu in (6,900 cc)
Cylinder bore 3.74 in (95 mm)
Piston stroke 4.76 in (121 mm)
Cylinder block materialCast iron
Cylinder head materialCast iron
Valvetrain DOHC, 4 valves per cylinder
Compression ratio 5.7:1
Combustion
Supercharger Duesenberg centrifugal (optional from 1932)
Fuel systemSingle updraft Schleber carburetor
Fuel typeGasoline
Cooling system Water-cooled
Output
Power output
  • 265 hp (198 kW) at 4,250 rpm (normal)
  • 320 hp (240 kW) at 4,200 rpm (supercharged)
Chronology
PredecessorDuesenberg Model A engine
ProductionEngineDisplacementBore x strokeCam and valveModel
1921–1927260259.7 cu in (4,256 cc) [2] 2.875 in × 5.000 in (73.0 mm × 127.0 mm)SOHC 2vA, X
1928–1937420419.7 cu in (6,878 cc)3.750 in × 4.750 in (95.3 mm × 120.7 mm)DOHC 4vJ, SJ, SSJ

Competition engines

The engines listed below were designed by Duesenberg for the Indianapolis 500. Some engines of the 122 CID and 91 CID design were bored/stroked to larger displacements for other races classes, after the 1930 rules change at Indianapolis.

ProductionEngineDisplacementBore x strokeCam and valve
1919–1921 [3] 300296.9 cu in (4,865 cc)3.000 in × 4.750 in (76.2 mm × 120.7 mm)SOHC 3v
1921-1923 [3] 183183.0 cu in (2,999 cc)2.500 in × 4.660 in (63.5 mm × 118.4 mm)SOHC 3v
1923-1925 [3] 122121.3 cu in (1,988 cc)2.375 in × 3.422 in (60.3 mm × 86.9 mm)DOHC 4v / DOHC 2v (supercharged) [4]
1926–1929 [3] 9190.3 cu in (1,480 cc)2.286 in × 2.750 in (58.1 mm × 69.9 mm)DOHC 4v
1930–1932 [5] 244244 cu in (4,000 cc) ?SOHC desmodromic

See also

References

  1. ↑ Cheetham, Craig (2006) [2004]. Vintage Cars. St. Paul, MN USA: Motorbooks. pp. 75, 79. ISBN   978-0-7603-2572-8 . Retrieved 2013-12-13.[ dead link ]
  2. ↑ "Directory Index: Duesenberg/1922_Duesenberg_Model_A_Catalogue". Oldcarbrochures.com. Retrieved 2011-11-20.
  3. 1 2 3 4 Borgeson, Griffith (1998). The Golden Age of the American Racing Car. SAE International. ISBN   978-0-7680-0023-8 . Retrieved 2009-07-05– via Google Books.[ page needed ]
  4. ↑ Vaughan, Daniel. "1925 Duesenberg Eight Speedway Roadster". conceptcarz.com. Retrieved 27 August 2016.
  5. ↑ "Duesenburg SOHC 8 Cylinder Indianapolis Racing Engine". Museum of American Speed. Retrieved 27 August 2016.[ dead link ]
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