What Are the Engine Specs on a 1997 FL70 Freightliner?
Freightliner is one of the most respected names in commercial truck manufacturing. The FL-70 is one of the company's ubiquitous semi-trailer trucks. These trucks provide the engines and driver's cab which attach to many different kinds of loads. The Freightliner FL-70 truck cab is powered by Caterpillar's commercial duty, C-12 diesel engine.
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Engine Design
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The FL-70's Caterpillar C-12 engine offers 732 cubic inches of displacement. This diesel engine uses a turbocharger to force more air into the engine, creating a more powerful motor with higher compression ratings. At the core of this powerplant is an engine block with a 5.1-inch bore and 5.9-inch stroke. The C-12 engine offers 10.2 liters of engine-cooling capacity, and requires 36 liters of oil.
Performance
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The Freightliner FL-70's engine has an operating range of between 1,200 and 2,100 rpm. The advertised peak hp of this engine is 430, but dyno testing shows that the C-12 diesel is capable of generating 445 hp at 1,600 rpm. Peak torque for this engine is 1,650 pound-feet at 1,200 rpm, reflecting the heavy-duty commercial nature of this powerplant.
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Electrical Features
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Thes Caterpillar engine in the Freightliner FL-70 is there because of its electronic tuning options. The C-12 has a self-diagnostic tool as well as electronic monitors that allow tracking of fuel consumption, speed and idle time. The Fleet Information System on this engine allows shipping companies to track all of these parameters for efficiency in their fleets. Additionally, the engine has programmable parameters to limit the truck's speed and engine revolutions and an idle time shut-off switch.
Tuning
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Optimum performance for the C-12 engine is when the engine is working at 1,400 rpm at 55 mph, and 1,475 rpm at 60 mph. Maximum cruising speed for the truck should occur when the engine is working at 1,700 rpm.
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