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5.9L Magnum V8 Explained

Chrysler's Magnum Series engine is, more or less, the second generation of the LA-series small block. In early form the Magnum engine was used exclusively in Dodge trucks such as the Dakota, Ram, Durango and Ram Van. As quickly as it came out, the Jeep Grand Cherokee also got them as an option. The production run of the Magnum engine series was from 1992-2003. Aftermarket support for the Magnum series has grown over the years and with proper maintenance, they will last forever.

Next to come, for 1993, was the 5.9L Magnum V8. Horsepower at first was 230 with torque pegged at 330 ft/lbs. Five years later in 1998, 245 was the horsepower number, and 345 was the torque. However, in the Dodge Dakota R/T and 1998-only Jeep Grand Cherokee 5.9 Limited, horsepower was bumped to a full 250, while torque remained the same. Buyers of the Durango R/T were lucky enough to get the same 250 hp, but also an extra bump in torque to a righteous 350 ft/lbs, which is approaching modern Hemi numbers.

Displacement= 5.9 Liters / 360 cubic inches

Bore x Stroke= 4.00" x 3.58"

Compression Ratio= 8.9:1

Firing Order= 1-8-4-3-6-5-7-2

Fuel Induction= Multi-point Fuel Injection (MPFI)

Valvetrain Arrangement=
single in-block camshaft
16 valves total

Stock Camshaft Specs=
251 degrees duration intake / 271 degrees duration exhaust
.411" lift intake / .417" lift exhaust

Factory Availability=
'98-'03 Dodge Dakota R/T
'98-'03 Dodge Durango
'92-'03 Dodge Ram 1500
'92-'03 Dodge Ram 2500
'92-'03 Dodge Ram 3500
'92-'01 Dodge Ramcharger (includes the Mexico-only version)
'92-'03 Dodge Ram Van 1500
'92-'03 Dodge Ram Van 2500
'92-'03 Dodge Ram Van 3500
'92-'03 Dodge Ram Wagon 1500
'92-'03 Dodge Ram Wagon 2500
'92-'03 Dodge Ram Wagon 3500
'98 Jeep Grand Cherokee 5.9 Limited
a few Freightliner FL-series trucks of the Daimler era

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