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| Prince G engine | |
|---|---|
 | |
| Overview | |
| Manufacturer | Prince Motor Company |
| Production | 1955-1975 |
| Layout | |
| Configuration | Inline 4 &Inline 6 |
| Displacement | Four-cylinder: 1.5 L (1,484 cc) 1.6 L (1,593 cc) 1.8 L (1,815 cc) 1.9 L (1,862 cc) 2.0 L (1,990 cc) Six-cylinder: 2.0 L (1,988 cc) 2.5 L (2,494 cc) |
| Cylinder bore | 75 mm (2.95 in) 80 mm (3.15 in) 82 mm (3.23 in) 84 mm (3.31 in) 89 mm (3.5 in) |
| Piston stroke | 63 mm (2.48 in) 70.2 mm (2.76 in) 80 mm (3.15 in) 84 mm (3.31 in) 85 mm (3.35 in) |
| Valvetrain | OHV (GA30, GA4, GB30) SOHC (all except GR-8, GA30, GA4, GB30) DOHC (GR-8) |
| Compression ratio | 8.3:1, 9.3:1, 9.7:1, 11.0:1 |
| Combustion | |
| Fuel system | SU orWeber carburetors Mechanical fuel injection |
| Fuel type | Gasoline,Diesel |
| Cooling system | Water cooled |
| Output | |
| Power output | 46–223 PS (34–164 kW; 45–220 bhp) |
| Torque output | 10–19.9 kg⋅m (98–195 N⋅m; 72–144 lb⋅ft) |
| Chronology | |
| Predecessor | FG4A |
| Successor | L16 (G-16) L18 (G-18) S20 (GR-8) |
ThePrince G-series engine was the company's onlystraight-four andstraight-six engines which began production in 1955. A number of variations were made, with bothOHV andOHC heads. A diesel four-cylinder with 1.9 L (1,862 cc) was also built, called theD-6. The G series was used in theSkyline, theLaurel, and theGloria from the 1950s to the early 1970s.
Note that, prior to its merger with Prince, Nissan also made a G series of engines. These are unrelated engines and are documented at theNissan G engine page.
The source of the listed information is the corresponding article at Japanese Wikipedia.
In 1956, Prince developed a flat-2 engine, the FG2D, for their DPSK (later CPSK) concept car. It displaced 601 cc and produced 24 hp (24 PS). The engine suffered excessive vibration and noise issues and was replaced with the FG4C engine.[1]
Prince developed the FG4C, a flat-four displacing 599 cc and producing 38 hp (39 PS), as a replacement for the FG2D. The FG4C was used in the 1957 CPSK concept.[1]
1.5 L (1,484 cc) diameter X stroke: 75 mm × 84 mm (2.95 in × 3.31 in), OHV
1.5 L (1,484 cc) diameter X stroke: 75 mm × 84 mm (2.95 in × 3.31 in), OHV
1.5 L (1,484 cc) diameter X stroke: 75 mm × 84 mm (2.95 in × 3.31 in), OHV
Renamed GA-30 in 1958
Applications:
1.5 L (1,484 cc) diameter X stroke: 75 mm × 84 mm (2.95 in × 3.31 in), OHV
1.5 L (1,484 cc) diameter X stroke: 75 mm × 84 mm (2.95 in × 3.31 in), OHV
1959 improvement on the GA-30; also known as FG4A-40
Applications:
1.9 L (1,862 cc) diameter X stroke: 84 mm × 84 mm (3.31 in × 3.31 in), OHV
Also known as FG4B-30
Applications:
1.9 L (1,862 cc) diameter X stroke: 84 mm × 84 mm (3.31 in × 3.31 in), OHV
Also known as FG4B-40
Applications:
The PrinceG-1 was the improved GA-4, and was rated at 1.5 L, but displaced 1.5 L; 90.6 cu in (1,484 cc) thanks to an entirely different 75 by 84 mm (2.95 by 3.31 in) bore and stroke. Thisundersquare arrangement was similar to the designs Nissan licensed fromAustin Motor Company, though this is probably coincidental. This engine was also anOHV design and power output was similar to the Nissan G at 73 hp (54 kW; 74 PS) and 12 kg⋅m (118 N⋅m; 87 lb⋅ft).
Applications:
TheG-2 is a 1.9 L; 113.6 cu in (1,862 cc) version used by Prince. Bore and stroke weresquare at 84 mm (3.31 in), and output was 96 hp (72 kW; 97 PS) and 15.7 kg⋅m (154 N⋅m; 114 lb⋅ft) with a 2 barrelcarburetor. It was an improved version of the GB-4 and was introduced in 1962 and was installed in the S40 series Prince Gloria as well as the Clipper and Super Miler commercial vehicles. The G-2 was an OHV design.
Applications:
TheSOHCG-15 was a 1.5 L; 90.5 cu in (1,483 cc) engine produced in 1967 for the Skyline. Bore and stroke was 82 mm × 70.2 mm (3.23 in × 2.76 in). With a 2 barrel carburetor equipped, the engine produced 88 PS (65 kW; 87 hp) and 12.2 kg⋅m (120 N⋅m; 88 lb⋅ft). With a crossflow cylinder head, a V-shaped canted valve arrangement and a multi-spherical combustion chamber design, the G-15 was the most technologically advanced Japanese car engine of its day, eclipsing evenNissan's L series engine in their design. TheNissan G engine was not related to the Prince engine; the Nissan version wasOHV and slightly smaller displacement. The G-15 was discontinued in 1972 when the C110 Skyline was introduced.
Applications:
1.6 L (1,593 cc) inside diameter x stroke: 85 mm × 70.2 mm (3.35 in × 2.76 in) mmin, SOHC
The G-18 was de-stroked to 70.2 mm (2.76 in) to form theG-16. Adapting the engine to more stringent US emissions was deemed too expensive, and it was replaced by the Nissan L16 engine in 1975.
Applications:
TheG-18 was a 1.8 L; 110.8 cu in (1,815 cc). Its 85 mm (3.35 in) bore was the largest in the range (except for the G20 mentioned in the next paragraph), and the 80 mm (3.15 in) stroke gave it goodoversquare dimensions. It was anSOHC cross flow cylinder head design like the G-15 and produced 105 hp (78 kW; 106 PS) and 15.9 kg⋅m (156 N⋅m; 115 lb⋅ft).
This engine was discontinued in 1975 due to tightening emission regulations and replaced with theL18.
Applications:
2.0 L (1,990 cc) inside diameter x stroke: 89 mm × 80 mm (3.50 in × 3.15 in), SOHC
Twin Barrel single Carburetor
TwinSU carburetor regular gasoline
Twin SU carburetor high octane gasoline
This engine was only used in the 1968-1975 C30 & C130Laurel, and was discontinued in 1975 due to tightening emission regulations.
Prince used astraight-6 version of the G family in their famousSkyline cars. All of the Prince straight-6 engines usedsingle overhead cam heads. Engine displacement was kept below 2000cc to limit the amount ofRoad tax to be paid yearly in addition to other Japanese Government mandated expenses.
TheG-7 is a straight-6 version displacing 2.0 L; 121.3 cu in (1,988 cc). It was the engine of theGT-modelPrince Skylines and was anOHC engine unlike the mainly-OHV family that spawned it. Bore and stroke were square at 75 mm (2.95 in) and power output varied with the carburetor equipped. Plain versions featured a 2 barrel carb and 8.8:1 for 106 hp (79 kW; 107 PS) and 16 kg⋅m (157 N⋅m; 116 lb⋅ft), while the 1965 Skyline GT-B used 3 twin-barrelWeber carburetors and 9.3:1 compression for 127 hp (95 kW; 129 PS) and 17 kg⋅m (167 N⋅m; 123 lb⋅ft). It was influenced by theMercedes-Benz M180 straight six engine.[2] The intake and exhaust manifolds are on the left side of the engine because Japanese drivers sit on the right side and the steering column would interfere, while the Mercedes-Benz engine places the intake and exhaust on the right side due to left hand driving conditions.
Applications:
2.0 L (1,988 cc) inside diameter x stroke: 75 mm × 75 mm (2.95 in × 2.95 in)
An improvement on the G7 using a cross-flow cylinder head and was converted into racing use during 1965 - 1966 in the S54 Skyline GT used for racing. Was not commercially available.
2.0 L (1,996 cc) inside diameter x stroke: 82 mm × 63 mm (3.23 in × 2.48 in), DOHC[3]
| R380-I 1965 | R380A-I 1966 | R380A-II 1967 | R380A-III 1968 | R380A-III 1969 | |
|---|---|---|---|---|---|
| Fuel delivery[3] | 3× Weber 42 DCOE | 3× Weber 45 DCOE | Lucas fuel injection | ||
| Power (gross)[3] | 200 PS (147 kW; 197 bhp) @ 8000 rpm | over 200 PS (147 kW; 197 bhp) @ 8000 rpm | 220 PS (162 kW; 217 bhp) @ 8500 rpm | 245 PS (180 kW; 242 bhp) @ 8400 rpm | 250 PS (184 kW; 247 bhp) @ 8400 rpm |
Racing engine used in thePrince R380 and Nissan R380-II, based on the G7 engine.[4] It used 4 valves per cylinders andDOHC, used 3Weber carburetors model 42DCOE-18, producing a claimed 200 hp (149 kW; 203 PS) for the R380 and 220 hp (164 kW; 223 PS) for the R380-II.[3] The GR-8 used in the R380-III featuredmechanical fuel injection.[3]
TheNissan S20 engine was derived from the GR-8.[5]
TheG-11 is another straight-6 OHC version, displacing 2.5 L; 152.2 cu in (2,494 cc). Bore was up to 84 mm (3.31 in) like the G-2 4-cylinder, while stroke remained at 75 mm (2.95 in) as on the G-7. Power output with a 4 barrel carburetor was 134 hp (100 kW; 136 PS) with 19.9 kg⋅m (195 N⋅m; 144 lb⋅ft) of torque.
Applications:
