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Chrysler Hemi-6 Engine

April 09, 2024

The Chrysler Hemi-6 engine is a family of inline six-cylinder petrol engines produced by Chrysler Australia in three piston displacements and multiple configurations.[1] Hemi-6 engines were installed in Australian-market Chrysler Valiants from 1970 through 1981. It was also installed in the Valiants closely related variants, the Chrysler VIP, the Chrysler by Chrysler & the Valiant Charger.

Chrysler Hemi-6
Overview
ManufacturerChrysler Australia
Production1970-1981
Layout
ConfigurationNaturally aspirated
Inline-6
Displacement215–265 cu in (3.5–4.3 L)
Cylinder block materialCast Iron
Cylinder head materialCast Iron
ValvetrainOHV 2 valves x cyl.
Combustion
Fuel typePetrol
Oil systemWet sump
Cooling systemWater-cooled
Output
Power output80–225 kW (109–306 PS; 107–302 hp)
Torque output318–434 N⋅m (235–320 lb⋅ft)

Development and release edit

Chrysler Corporation in the US had been working since 1966 on an inline 6-cylinder engine, called the D-engine, to replace the Slant 6 (G-engine) in Dodge trucks, but abandoned the effort after prototypes were built. This was Chrysler's first thin wall (lightweight) cast iron engine design. Chrysler Australia wanted a new six-cylinder engine for use in the Australian Chrysler Valiant, and so Chrysler USA sent a prototype engine to Chrysler Australia's engineers to continue developing the D-engine. The first 245 cu in (4.0 L) variant was released for the 1970 model year in the VG-model Valiant.

In a major coup for the company, Chrysler Australia's ad agency, the Young & Rubicam Advertising Agency in Adelaide, South Australia, secured the services of British racing driver Stirling Moss to promote the new Hemi-6 4.0 L (245 cu in) in 1969. The agency managed to fly Moss to Adelaide in secret for the advertising campaign, surprising Chrysler Australia's executives. Young & Rubicam's parent company were also the advertising agents for the Chrysler Corporation in the US.

Engineering and design features edit

The Hemi-6 is a pushrod O.H.V. (overhead valve engine), with combustion chambers comprising about 35% of the top of the globe. This creates what is known as a low hemispherical shaped chamber. In this way, the "Hemi" moniker was used for the same kind of marketing cachet as Chrysler's 1950s-1970s Hemi V8 engines.

The Hemi-6 valves are angled apart (splayed) 18 degrees (included angle) along the crankshaft axis, and the intake valves are as large as 1.96 in (50 mm). The 6 intake and 6 exhaust valves open slightly towards each other and away from the cylinder wall, which results in less "shrouding" of the valves and greater airflow potential. In addition, both valves are slightly inclined across the crankshaft axis, similar to a conventional "wedge" chamber. The cylinder head is not a crossflow design, meaning the 6 intake and 6 exhaust ports are on the same side of the engine (the left, Australian and British passenger, side).

Unlike Chrysler's contemporaneous hemi V8 engines, the Hemi-6's rocker arms are mounted on individual studs (similar to the Chevrolet "big block" V8), rather than on 2 separate rocker shafts as in all 1951-58 Hemis—Dodge, DeSoto, Imperial, and Chrysler "Firepower" and 1964-'71 Plymouth and Dodge 426 V8s.

All Hemi-6s share a robust crankshaft supported by seven main bearings, and this family of engines quickly developed a reputation for excellent performance, economy, and durability.

The Australian Hemi engines were designed by a five-man team which included the late Maurice Harcus.

Versions and variants edit

245 cu in (4.0 L) edit

 
Chrysler "hemi" 245 prototype, on display at the National motor museum, Birdwood, South Australia

The 245 was the initial version of the Hemi-6 engine. It was first used in the 1970 VG-model Valiant, and was available clear through to the final CM model of 1981. Initially, only a single barrel carburettor version was available for Australian built cars but a two barrel version was made especially for the VH and VJ Valiant Ranger XL variants assembled in New Zealand from 1971 to 1975. The two barrel consequently became available in Australia with the VK series update.

Specifications (for 1bbl carbureted variant):

  • Bore x Stroke Size: 3.76 in × 3.68 in (96 mm × 93 mm)
  • Compression ratio: 9.5:1
  • Power: 123 kW (167 PS; 165 hp) at 4600 rpm
  • Torque: 318 N⋅m (235 lb⋅ft) at 1800 rpm
  • Intake valve head diameter: 1.845 in (46.9 mm)
  • Exhaust: 1+1⁄2-inch (38.1 mm)

245LC (Low Compression) released in 1977

  • Bore x Stroke Size: 3.76 in × 3.68 in (96 mm × 93 mm)
  • Compression ratio: 7.6:1
  • Power: 130 hp (97 kW) estimate
  • Torque: 180 lb⋅ft (244 N⋅m) estimate
  • Intake valve head diameter 1.845-inch (46.9 mm)
  • Exhaust valve head diameter 1+1⁄2-inch (38.1 mm)

265 cu in (4.3 L) edit

 
Chrysler Hemi 265ci 6-cylinder hemispherical combustion chambers with large intake and exhaust valves (removed) and big square ports

The 265 cu in (4.3 L) was introduced in 1971 in the VH. It used a new cylinder block with a bigger bore diameter of 3.91 in (99 mm)—the same as many of the Chrysler small-block V8s—and a new cylinder head, having slightly more hemispherical shaped combustion chambers with larger valves.

The standard version of the 265 produced 203 hp (151 kW) at 4600 rpm and 262 lb⋅ft (355 N⋅m) of torque at 2800 rpm.

The top-of-the-line performance engine in the E49 Chargers produced 302 hp (225 kW) at 5600 rpm and 320 lb⋅ft (434 N⋅m) of torque at 4400 rpm. The increased power is due mainly to a more aggressive camshaft, high-load valve springs, triple 45 mm (1.8 in) DCOE sidedraught Weber carburetors, tuned-length exhaust headers and a higher compression ratio of 10.0:1.

Specifications (for 2bbl carbureted variant):

  • Bore x Stroke Size: 3.91 in × 3.68 in (99 mm × 93 mm)
  • Compression ratio: 9.5:1
  • Power: 151 kW (202 hp) at 4600 rpm
  • Torque: 355 N⋅m (262 lb⋅ft) at 2800 rpm
  • Intake valve head diameter: 1.96 in (49.8 mm)
  • Exhaust: 1.6 in (40.6 mm)

215 cu in (3.5 L) edit

This economy-orientated version of the Hemi 6 was released as a running change in early 1971 as the base model engine in the VH Valiant. This engine shares the same stroke length as the other engines but has a smaller bore size of 3.52 in (89 mm) and lower compression ratio of 8.0:1. It ran on regular petrol and produced 104 kW (139 hp) at 4400 rpm and 270 N⋅m (199 lb⋅ft) of torque at a low 1800 rpm.

Specifications:

  • Bore x Stroke Size: 3.52 in × 3.68 in (89 mm × 93 mm)
  • Compression ratio: 8.0:1
  • Power: 104 kW (139 hp) at 4400 rpm
  • Torque: 270 N⋅m (199 lb⋅ft) at 1800 rpm
  • Intake valve head diameter: 1.835 in (46.6 mm)
  • Exhaust valve head diameter: 1+1⁄2 in (38.1 mm)

References edit

  1. ^ Dulcich, Steve (1 August 2005). "Chrysler Australia History". Motor Trend. Retrieved 5 February 2024.

April 09, 2024
chrysler, hemi, engine, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, feb. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Chrysler Hemi 6 Engine news newspapers books scholar JSTOR February 2024 Learn how and when to remove this template message The Chrysler Hemi 6 engine is a family of inline six cylinder petrol engines produced by Chrysler Australia in three piston displacements and multiple configurations 1 Hemi 6 engines were installed in Australian market Chrysler Valiants from 1970 through 1981 It was also installed in the Valiants closely related variants the Chrysler VIP the Chrysler by Chrysler amp the Valiant Charger Chrysler Hemi 6OverviewManufacturerChrysler AustraliaProduction1970 1981LayoutConfigurationNaturally aspiratedInline 6Displacement215 265 cu in 3 5 4 3 L Cylinder block materialCast IronCylinder head materialCast IronValvetrainOHV 2 valves x cyl CombustionFuel typePetrolOil systemWet sumpCooling systemWater cooledOutputPower output80 225 kW 109 306 PS 107 302 hp Torque output318 434 N m 235 320 lb ft Contents 1 Development and release 2 Engineering and design features 3 Versions and variants 3 1 245 cu in 4 0 L 3 2 265 cu in 4 3 L 3 3 215 cu in 3 5 L 4 ReferencesDevelopment and release editChrysler Corporation in the US had been working since 1966 on an inline 6 cylinder engine called the D engine to replace the Slant 6 G engine in Dodge trucks but abandoned the effort after prototypes were built This was Chrysler s first thin wall lightweight cast iron engine design Chrysler Australia wanted a new six cylinder engine for use in the Australian Chrysler Valiant and so Chrysler USA sent a prototype engine to Chrysler Australia s engineers to continue developing the D engine The first 245 cu in 4 0 L variant was released for the 1970 model year in the VG model Valiant In a major coup for the company Chrysler Australia s ad agency the Young amp Rubicam Advertising Agency in Adelaide South Australia secured the services of British racing driver Stirling Moss to promote the new Hemi 6 4 0 L 245 cu in in 1969 The agency managed to fly Moss to Adelaide in secret for the advertising campaign surprising Chrysler Australia s executives Young amp Rubicam s parent company were also the advertising agents for the Chrysler Corporation in the US Engineering and design features editThe Hemi 6 is a pushrod O H V overhead valve engine with combustion chambers comprising about 35 of the top of the globe This creates what is known as a low hemispherical shaped chamber In this way the Hemi moniker was used for the same kind of marketing cachet as Chrysler s 1950s 1970s Hemi V8 engines The Hemi 6 valves are angled apart splayed 18 degrees included angle along the crankshaft axis and the intake valves are as large as 1 96 in 50 mm The 6 intake and 6 exhaust valves open slightly towards each other and away from the cylinder wall which results in less shrouding of the valves and greater airflow potential In addition both valves are slightly inclined across the crankshaft axis similar to a conventional wedge chamber The cylinder head is not a crossflow design meaning the 6 intake and 6 exhaust ports are on the same side of the engine the left Australian and British passenger side Unlike Chrysler s contemporaneous hemi V8 engines the Hemi 6 s rocker arms are mounted on individual studs similar to the Chevrolet big block V8 rather than on 2 separate rocker shafts as in all 1951 58 Hemis Dodge DeSoto Imperial and Chrysler Firepower and 1964 71 Plymouth and Dodge 426 V8s All Hemi 6s share a robust crankshaft supported by seven main bearings and this family of engines quickly developed a reputation for excellent performance economy and durability The Australian Hemi engines were designed by a five man team which included the late Maurice Harcus Versions and variants edit245 cu in 4 0 L edit nbsp Chrysler hemi 245 prototype on display at the National motor museum Birdwood South AustraliaThe 245 was the initial version of the Hemi 6 engine It was first used in the 1970 VG model Valiant and was available clear through to the final CM model of 1981 Initially only a single barrel carburettor version was available for Australian built cars but a two barrel version was made especially for the VH and VJ Valiant Ranger XL variants assembled in New Zealand from 1971 to 1975 The two barrel consequently became available in Australia with the VK series update Specifications for 1bbl carbureted variant Bore x Stroke Size 3 76 in 3 68 in 96 mm 93 mm Compression ratio 9 5 1 Power 123 kW 167 PS 165 hp at 4600 rpm Torque 318 N m 235 lb ft at 1800 rpm Intake valve head diameter 1 845 in 46 9 mm Exhaust 1 1 2 inch 38 1 mm 245LC Low Compression released in 1977 Bore x Stroke Size 3 76 in 3 68 in 96 mm 93 mm Compression ratio 7 6 1 Power 130 hp 97 kW estimate Torque 180 lb ft 244 N m estimate Intake valve head diameter 1 845 inch 46 9 mm Exhaust valve head diameter 1 1 2 inch 38 1 mm 265 cu in 4 3 L edit nbsp Chrysler Hemi 265ci 6 cylinder hemispherical combustion chambers with large intake and exhaust valves removed and big square portsThe 265 cu in 4 3 L was introduced in 1971 in the VH It used a new cylinder block with a bigger bore diameter of 3 91 in 99 mm the same as many of the Chrysler small block V8s and a new cylinder head having slightly more hemispherical shaped combustion chambers with larger valves The standard version of the 265 produced 203 hp 151 kW at 4600 rpm and 262 lb ft 355 N m of torque at 2800 rpm The top of the line performance engine in the E49 Chargers produced 302 hp 225 kW at 5600 rpm and 320 lb ft 434 N m of torque at 4400 rpm The increased power is due mainly to a more aggressive camshaft high load valve springs triple 45 mm 1 8 in DCOE sidedraught Weber carburetors tuned length exhaust headers and a higher compression ratio of 10 0 1 Specifications for 2bbl carbureted variant Bore x Stroke Size 3 91 in 3 68 in 99 mm 93 mm Compression ratio 9 5 1 Power 151 kW 202 hp at 4600 rpm Torque 355 N m 262 lb ft at 2800 rpm Intake valve head diameter 1 96 in 49 8 mm Exhaust 1 6 in 40 6 mm 215 cu in 3 5 L edit This economy orientated version of the Hemi 6 was released as a running change in early 1971 as the base model engine in the VH Valiant This engine shares the same stroke length as the other engines but has a smaller bore size of 3 52 in 89 mm and lower compression ratio of 8 0 1 It ran on regular petrol and produced 104 kW 139 hp at 4400 rpm and 270 N m 199 lb ft of torque at a low 1800 rpm Specifications Bore x Stroke Size 3 52 in 3 68 in 89 mm 93 mm Compression ratio 8 0 1 Power 104 kW 139 hp at 4400 rpm Torque 270 N m 199 lb ft at 1800 rpm Intake valve head diameter 1 835 in 46 6 mm Exhaust valve head diameter 1 1 2 in 38 1 mm References edit Dulcich Steve 1 August 2005 Chrysler Australia History Motor Trend Retrieved 5 February 2024 Retrieved from https en wikipedia org w index php title Chrysler Hemi 6 Engine amp oldid 1203773163, wikipedia, wiki, book, books, library,

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