Ford HSC engine

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High Swirl Combustion (HSC)
Manufacturer Ford Motor Company
Production 1984 - 1994
Displacement 2.3 L (140 cu in)
2.5 L (152 cu in)
Cylinder bore 3.68 in (93.5 mm)
Piston stroke 3.3 in (83.8 mm)
3.58 in (90.9 mm)
Cylinder block alloy Iron
Cylinder head alloy Iron
Valvetrain OHV
Fuel system CFI (1985-1987)
MPFI (1988-1990)
SEFI (1991-1994)
Fuel type Unleaded gasoline

The HSC ("High Swirl Combustion") is an automobile engine from Ford Motor Company sold from 1984 until 1994. It was produced in Lima, Ohio, largely using tooling and designs adapted from the 200 CID straight-6. Basically, this engine has been introduced as an alternative to the Lima OHC 2.3L engine, for which demand had been higher than the installed capacity for its production at that time.


The 2.3 L (2301 cc, 140 CID) version was introduced in 1984 for the Ford Tempo/Mercury Topaz. Bore is 3.68 in (93.5 mm) and stroke is 3.3 in (83.8 mm).[1] This engine produced 90 hp (67 kW) and 125 lb⋅ft (169 N⋅m) of torque.[2] The HSC was Ford's first production "fast burn" engine.

1985 brought two significant changes. American-market engines received Central Fuel Injection (CFI), which reduced power to 86 hp.[2] Ford remedied the power decrease with a High Specific Output "HSO" model, introduced for the high-performance variants of the Tempo (GLS) and Topaz (LTS/XR-5). Output was 100 hp (75 kW) and 125 lb⋅ft (169 N⋅m) of torque.[2] This engine is denoted by an "S" in the VIN.

The early HSC engines were carbureted, with a 1-barrel Holley 6149 carburetor. Single point Central Fuel Injection (CFI) was added in 1985. It was switched over to multi-port fuel injection in 1988 which raised horsepower to 95. Sequential fuel injection was added for 1992 increasing horsepower to 98, but the HSO variant was dropped (as the sportier versions of the Tempo/Topaz received the 3.0 L Vulcan as standard equipment for 1992).



A 2.5 L (2496 cc, 152 CID) version appeared in 1986 with longer 3.58 in (90.9 mm) stroke and electronic fuel injection. The extra displacement was needed to provide a four-cylinder engine option for fleet customers of the new Ford Taurus. This engine used the head and cam from the HSO engine and produced 90 hp (67 kW) and 130 lb⋅ft (180 N⋅m) of torque.[3] It sold in low volume (less than 15% of the HSC engines built) and was costly due to the tooling changeover required for the taller engine block deck height. It received sequential fuel injection in 1991, raising output to 105 hp (78 kW) and 140 lb⋅ft (190 N⋅m) of torque.



  1. ^ "HSC Engine Dimensions". Tempo Topaz Car Club of America. Retrieved 2007-02-04. 
  2. ^ a b c "HSC History and Specifications". Tempo Topaz Club of America. Retrieved 2007-02-04. 
  3. ^ "1990-95 Ford Taurus review". Consumer Guide. Archived from the original on 2007-10-27. Retrieved 2007-02-04.