Monday, November 18, 2013
3 9L Cummins Diesel Engine Specs
The Cummings 3.9-liter turbo diesel 4BT engine is a straight-4 configuration engine used in automotive applications including small trucks, SUVs and commercial vans in addition to many off-road applications that include boating, construction equipment, farm machinery and other off-road uses. Owing mainly to its ability to generate high torque at lower rpm, this Cummins workhorse engine is a favorite replacement engine for any application calling for a small diesel engine or changeover from gasoline to diesel.
General Specifications
The 4BT measures 30.6 inches long, 24.6 inches wide and 37.7 inches high. It has net of 745 to 785 lbs. without fluids or accessories, depending on configuration. The "4BT" designation means it has four cylinders and belongs to the B series of Cummins engines. The "T" stands for "turbocharged." The 4BT is a four-cylinder version of the Cummins 6BT used in Dodge trucks as a replacement for eight-cylinder gasoline engines.
Mechanical Specifications
This 3.9-liter Cummins diesel engine is an eight-valve, in-line four-cylinder engine with a displacement of 3.9 liters, or 239 cubic inches. It has a bore of 4.02 inchesand a piston stroke of 4.72 inches. With the piston at top dead center, the engine has a compression ratio of 17.5 to 1. Engine air delivery occurs via a non-intercooled turbocharger. With the oil filter, the engine holds 10 quarts of oil.
Power
As originally manufactured, this four-cylinder diesel delivered 105 horsepower at 2,300 rpm and 265 foot-lbs. of torque at 1,600 rpm. As of 2010, recent configurations deliver 130 horsepower and 335 foot-lbs. of torque. You can easily tweak the engine for more power by adjusting or changing the turbocharger, or by using different injector nozzles.
Very true. Cummins diesel engines are perfect!
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