Nissan S20 engine

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Nissan S20 engine
1969 Nissan S20 engine left.jpg
Overview
ManufacturerNissan Motors
DesignerYuji Sakakibara
Production1968-1973
Layout
ConfigurationStraight-6
Displacement2.0 L; 121.4 cu in (1,990 cc)
Cylinder bore82 mm (3.23 in)
Piston stroke62.8 mm (2.47 in)
ValvetrainDOHC 2 valves x cyl.
Combustion
Fuel systemThree 40DCOE Weber carburetors
Lucas mechanical fuel injection (after 1969)
Fuel typeGasoline
Cooling systemWater-cooled
Output
Power output160 hp (119 kW; 162 PS)
Torque output177 N⋅m; 130 lbf⋅ft (18 kg⋅m)
Dimensions
Dry weight199 kg (439 lb)
Chronology
PredecessorPrince GR-8

The Nissan S20 engine 2.0 L (1,990 cc) was a straight-6, DOHC internal combustion engine produced by Nissan (designed by the former Prince engineers) in the 1970s. It was essentially a revised production variant of the 1966 Prince GR8 engine from Prince/Nissan's R380 racecar. It produces 160 hp (119 kW; 162 PS) @ 7000 rpm and 177 N⋅m; 130 lbf⋅ft (18 kg⋅m) of torque @ 5600 rpm. The S20 weights 199 kg (439 lb).

The S20 powered Nissan's Skyline GT-R (C10 and C110) and Fairlady Z432 models

History[edit]

S20 engine installed in Fairlady Z432

The S20 was one of the technical carryovers to the Nissan brand from Prince technology. The Skyline model - built as a Prince car since the model's inception in the 1950s - received the new engine. The Skyline GT-B in 1969 saw the introduction of the PGC10 GT-R, followed by the KPGC10 GT-R with a shorter wheelbase and 2 fewer doors in 1970. This model would later win a 50 straight touring car victories. For 1972, Nissan introduced the C110 Skyline powered by the L series of engines. A small number of KPGC110 GT-R would be built utilizing the remainder of the S20s.

The S20 was later fitted to the Nissan Fairlady Z432, a sports racing model of the Nissan Fairlady Z (S30) model line.

The S20 features a dual overhead cam, cross-flow head with four valves per cylinder, and pent-roof combustion chamber. Early versions were fed via triple 40DCOE Weber carburetors; models after 1969 featured Lucas mechanical fuel injection. In racing trim, the fuel-injected motors reportedly produced over 225 bhp (168 kW), with 250 bhp (186 kW) for larger tracks like Fuji Speedway.

This engine was used in the following vehicles:

Engine specifications[edit]

S20 Engine installed in C10 Skyline GT-R.
  • 1,990 cc (2.0 L; 121.4 cu in) water-cooled gasoline inline-six engine
  • Bore x Stroke 82 mm × 62.8 mm (3.23 in × 2.47 in)
  • Maximum output (gross) 160 bhp (119 kW; 162 PS) @ 7,000 rpm
  • Maximum torque (gross) 177 N⋅m; 130 lbf⋅ft (18 kg⋅m) @ 5,600 rpm
  • Mikuni-Solex 3-barrel carburetor fuel supply system * N40PHH
  • DOHC 4 valves per cylinder, lifter valve direct-driven[1]
  • 06 liter oil capacity
  • dry weight 199 kg (439 lb)

See also[edit]

References[edit]

  1. ^ "1969 Nissan Skyline GT-R Hardtop C10". carfolio.com. Retrieved July 23, 2018.