Caterpillar Inc. manufactures heavy machinery and construction equipment, including trucks, trailers and large excavation vehicles. Caterpillar also manufactures and sells crate engines intended for industrial and street legal use. Labelled as "On Highway" diesel engines, these engines come in several variants suitable for heavy duty vehicles including trucks, buses and fire and emergency vehicles.
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C7 Torque Specs
The C-7 is a turbocharged inline-6 engine that is capable of producing 520 to 925ft-lbs of torque at 1,440rpm. Its bore and stroke is 4.33 inches by 5.0 inches and it has a displacement of 7.2 litres. Its gross output ranges from 210 to 300 horsepower when equipped on trucks and buses, while output ranges between 300 and 360 horsepower when equipped on RVs and fire trucks. The C7 has a compression ratio of 16.5:1.
C9 Torque Specs
The C9 is a turbocharged inline-6, four-stroke diesel engine capable of producing torque ranging from 890 to 1,350ft-lbs at 1,400rpm. Its bore and stroke is 4.53 inches by 5.87 inches and its displacement is 9.3 litres. Depending on the vehicle equipped, the C9 is capable of generating 285 to 425 horsepower at either 2,200 or 2,300rpm. Its compression ratio is 18:1.
C11 Torque Specs
The C11 engine is capable of producing a peak torque of 1,050 to 1,450ft-lbs at 1,200rpm. Its bore and stroke is 5.12 inches by 5.51 inches and its displacement is 11.1 litres. It is equipped with a Series Turbocharger and has a compression ratio of 17:1. Its gross output is rated at 305 to 370 horsepower at 2,100rpm.
C13 Torque Specs
The C13 engine has a peak torque output that ranges from 1,150 to 1,750ft-lbs at 1,200rpm. Its gross output ranges from 305 to 470 horsepower at 2,100rpm. Its bore and stroke is 5.12 inches by 6.18 inches and its compression ratio is 17.1:1. It has a displacement of 12.5 litres and also comes standard with the Series Turbocharger combustion system.
C15 Torque Specs
The C15 engine's peak torque ranges from 1,550 to 2,050ft-lbs at 1,200rpm and its gross output ranges from 435 to 625 horsepower at 2,100rpm. Its bore and stroke is 5.4 inches by 6.75 inches and its compression ratio is 18:1. It is also equipped with the Series Supercharger and its displacement is 15.2 litres.
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