The Physics
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Angular Speed of a Truck Engine

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C7 7.2L Diesel Engine, Caterpillar.
Cylinders In-Line 6
Bore/Stroke 4.33 x 5.00 (110 mm x 127 mm)
Displacement 7.2 L (441 cu in)
Weight 1425 lb (647 kg)
Horsepower 190 to 300 @ 2500/2400 rpm
Torque 520-860 lb-ft @ 1440 rpm
2400–2500 rpm
Nissan Frontier Pickup Manual, Haynes North America, 2001: 2D-1.
Oil pump pressure (at normal operating temperature)
2.4 L at idle More than 11 psi (78 kPa)
3000 rpm 60 to 70 psi (412 to 481 kPa)
3.3 L at idle More than 9 psi (59 kPa)
At 2000 rpm 60to 65 ps i(412to 451 kPa)
3.5 L at idle More than 14 psi (98 kPa)
At 2000 rpm 60 to 65 psi (294 kPa)
2000–3000 rpm
1999 2.2L (LN2) S-truck ENGINE DIAGNOSTIC PARAMETERS [pdf]. General Motors "900 > RPM > 6375
Engine run time > 40 Sec"
469–6375 rpm
Beisner, Arthur. Physics Fifth Edition. Addison-Wesley, 1991: 446. "At 800 rpm a diesel engine develops 60 kW and consumes18 kg of fuel per hour. At 1800 rpm the same engine develops 120 kW and consumes 32 kg of fuel per hour. Find its efficiency at each speed." 800–1800 rpm
Kennedy, David and Reed, Trevor. GM Truck Engine Swap- Project 6.5L Part 1: The Makings Of The Perfect Engine Swap. Diesel Power, 2008. [see table below] 1700-3600 rpm

Angular speed or angular velocity is a vector quantity which specifies the axis that an object is rotating on. The SI unit of angular velocity is radians per second, although it may be measured in other units such as degrees per second, degrees per hour, etc. When measured in cycles or rotations per unit time, an example of this is revolutions per minute.

James Watt who invented the term horsepower believes one horse can do 33,000 foot-pounds of work every minute. That means a horse generating 1 horse power can raise 330 pounds 100 feet in one minute, 33 pounds 1,000 feet in one minute, or 1,000 pounds 33 feet in one minute.

A truck engine has the same angular speed as a race car engine but only at very low translational speed. From 40 mph and higher the truck engine has to go to a second shift unlike the race car engine which is able to manage and goes to its second shift at 80 mph. Even though a truck engine might not measure greatly towards a race car's engine but truck engine's consistent speed help carrying large and heavy loads for long distances and periods of time. Engine performance is enhanced when the revolutions per minute are shortened. Trucks use many different types of engines. They use gasoline engines, four stroke turbo intercooler diesel engines, and locomotive-type engines such as a V12.

  6.2L vs. 6.5L vs. 6.6L Duramax
Engine codes: LH6, LL4 L56, L57,L65 LB7, LLY, LBZ, LMM
Year introduced: 1982 1992 2001
Displacement: 379 ci 397 ci 403 ci
Bore x stroke (in.): 3.98 x 3.80 4.06 x 3.82 4.06 x 3.90
Block material: cast iron cast iron cast iron
Head material: cast iron cast iron cast aluminum
Aspiration: normal turbo fixed or variable turbo
Valvetrain: OHV 2-V OHV 2-V OHV 4-V
Compression ratio: 21.5:1 18.0-20.2:1 17.5-16.4:1
Fuel injection: indirect indirect direct-injection, high-pressure common rail
Horsepower (intro): 130 hp @ 3,600 rpm 190 hp @ 3,400 rpm 300 hp @ 3,100 rpm
Torque (intro): 240 lb-ft @ 2,000 rpm 380 lb-ft @ 1,700 rpm 520 lb-ft @ 1,800 rpm
Horsepower (max): 143 hp @ 3,600 rpm 215 hp @ 3,200 rpm 365 hp @ 3,200 rpm
Torque (max): 257 lb-ft @ 2,000 rpm 440 lb-ft @ 1,800 rpm 660 lb-ft @ 1,600 rpm
Max rpm: 3,600 rpm 3,400 rpm 3,450 rpm

Carl Desir -- 2008