Holden Straight-six Motor - Red

Holden Red motor (1971–1974 HQ series)
Engine Displacement Compression Power Torque
bhp kW ft·lb N·m
2.84 L Red I6 173 cu in Low 112 84 160 220
High 118 88 168 228
3.3 L Red I6 202 cu in Low 129 96 190 260
High 135 101 194 263

Superseding the Grey motor, the Red motor was manufactured between 1963 and 1980. This was a completely new engined and in no way a further development of the grey motor. It featured a 7 bearing crankshaft, full flow oil filter and hydraulic tappets. Denoted by the cylinder block painted red, the engine made its debut in the Holden EH in capacities of 149 cubic inches (2.44 L) and 179 cubic inches (2.93 L) (or HP) producing 100 brake horsepower (75 kW) and 115 brake horsepower (86 kW) respectively. This was a power increase of 33 per cent and 53 per cent over the grey motor.

Red six-cylinder engines manufactured after October 1964 had the cubic inch capacity of the engine cast in raised numbers on the side of the block behind the generator/alternator location. Red engines manufactured prior to October 1964 had either no numbers cast (meaning that it was a 149-cubic-inch engine) or the letters "HP" cast (meaning that it was a 179-cubic-inch engine). All Red engines manufactured prior to April 1967 (including 149, 179, 161 and 186 engines) had forged steel crankshafts.

Capacities
  • 130 – South Africa, et al. HQ export
  • 138 – LC Torana
  • 149
  • 161
  • 173
  • 179
  • 186
  • 202

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