Ford HSC engine

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. The engine was introduced as an alternative to the 2.3 L overhead-cam Lima engine, for which demand had been higher than the installed capacity for its production at that time.

High Swirl Combustion (HSC)
Overview
Manufacturer	Ford Motor Company
Production	1984 - 1994
Layout
Configuration	Inline-four
Displacement	2.3–2.5 L; 140.4–152.3 cu in (2,301–2,496 cc)
Cylinder bore	93.5 mm (3.68 in)
Piston stroke	83.8 mm (3.30 in) 90.9 mm (3.58 in)
Block material	Iron
Head material	Iron
Valvetrain	OHV 2 valves x cyl.
Combustion
Fuel system	Holley 6149 carburetor CFI (1985-1987) MPFI (1988-1990) SEFI (1991-1994)
Fuel type	Unleaded gasoline
Cooling system	Water-cooled
Output
Power output	86–105 hp (64–78 kW)
Torque output	125–140 lb⋅ft (169–190 N⋅m)

2.3

The 2.3 L; 140.4 cu in (2,301 cc) version was introduced in 1984 for the Ford Tempo/Mercury Topaz. Bore and stroke is 93.5 mm × 83.8 mm (3.68 in × 3.30 in).[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 (64 kW).[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 hp (71 kW). Sequential fuel injection was added for 1992 increasing horsepower to 98 hp (73 kW), 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).

Applications:

• 1984–1994 Ford Tempo
• 1984–1994 Mercury Topaz

2.5

A 2.5 L; 152.3 cu in (2,496 cc) version appeared in 1986 with longer 90.9 mm (3.58 in) stroke and electronic multi-port 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 (176 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.

Applications:

• 1986–1991 Ford Taurus
• 1986 Mercury Sable

References

1. "HSC Engine Dimensions". Tempo Topaz Car Club of America. Archived from the original on 2007-09-28. Retrieved 2007-02-04.
2. "HSC History and Specifications". Tempo Topaz Club of America. Archived from the original on 2007-09-28. Retrieved 2007-02-04.
3. "1990-95 Ford Taurus review". Consumer Guide. Archived from the original on 2007-10-27. Retrieved 2007-02-04.