Ford SHO V6 engine

From Wikipedia, the free encyclopedia

Ford SHO V6
SHO 3.0 L V6 in a 1991 Taurus SHO
Manufacturer Ford Motor Company
Production: 1989–1995
Predecessor: ?
Successor: Ford SHO V8
Ford Duratec V6 engine

In 1984, Yamaha Motor Corporation signed a contract with Ford Motor Company to develop, produce, and supply a compact 60° DOHC V6 engine for transverse application. This engine was intended to power a mid-engine sports car, but that project (known internally as GN34) was cancelled. Instead, Ford decided to place the engine, dubbed the Super High Output (or SHO) into the front wheel drive Ford Taurus sedan.

The SHO engines share a common bell housing pattern with the following Ford engines: the 2.3/2.5 L FWD HSC I4, the 3.0L FWD/RWD Vulcan V6, and the 3.8 FWD Canadian Essex V6.

Due to the engine's unusual and aesthetically pleasing appearance as well as its compatibility with common Ford RWD transmissions, such as the AOD and T-5, it is sometimes transplanted into other vehicles. Its distinctive intake manifold is bilaterally symmetrical, so it can be rotated 180 degrees (making it face "backwards" on the engine, relative to its original installation orientation) to ease the engine's transition from transverse to longitudinal mounting.


Contents

[edit] 3.0 L

The SHO V6 was a high-tech design at its debut in 1989. Displacing 3.0L (2986 cc/182 in³), it was an iron block, aluminum head 24-valve DOHC engine with an innovative variable length intake manifold. Its oversquare design, which sported an 89 mm (3.5 in) bore and 80 mm (3.1 in) stroke, gave the high-revving engine an output of 220 bhp (164 kW) @ 6200 rpm and 200 ft·lbf (270 N·m) of torque (271 Nm) @ 4800 rpm at the flywheel. Redline was 7000 rpm, and fuel cut-off occurred at 7300 rpm. It should be noted, however, that the true redline was over 8500 rpm, but was set to 7000 due to accessories in the prototypes blowing out at around 8000 rpm. This engine was only available with the Ford MTX-IV transmission only.

[edit] 3.2 L

From 1993 to 1995, the SHO engine was sold in two displacements: the 3.0L was sold mated to the MTX-IV manual transmission, and a new 3.2L engine (3191 cc/195 in³) was sold mated to the Ford AX4S automatic transmission. The new 3.2L engine, while retaining the same 80 mm (3.1 in) stroke of its 3.0L brother, sported a larger 92 mm (3.6 in) bore that helped raise torque output to 215 ft·lb (291 Nm) @ 4000 rpm at the flywheel. Horsepower output was still 220 bhp (164 kW), but now at 6000 rpm: this is due to a slight reduction in intake camshaft duration.

In 1996, Ford discontinued the SHO V6 and began fitting the Taurus SHO's with the SHO 3.4L V8 and the Ford AX4N automatic transmission.

[edit] See also

[edit] External links

  • A 3.0L SHO V6 transplanted into a 1956 BN2 Austin-Healey[1]
  • Yamaha Motor Company time line from 1980-1989[2]