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4.7L Powertech V8 Explained

Chrysler's Powertech engine series is sometimes called the 'next generation' of the Magnum series. In fact, the Dodge marketing folks still used the 'Magnum' name for a time when describing the Powertech. The big pluses that the Powertech has over the Magnum are two spark plugs per cylinder, aluminum cylinder heads, plastic intake manifold, and single overhead camshafts. The Powertech could be found only in trucks. These were the Dodge Dakota, Durango, Nitro, and Ram, Jeep's Grand Cherokee, Liberty, and Commander, plus the Chrysler Aspen, and Mitsubishi Raider. The production run for the Powertech is from 1999-2013. There's very little aftermarket support for the 'next generation' engine, but with proper maintenance, like the Magnum, these will last forever.

The first of the series is the 4.7L Powertech V8, which arrived for the 1999 model year. Horsepower was rated at 235 on all these early versions which were made up until 2007. Torque varied between models. 2005-2007 Durangos generally had 290 ft/lbs. Dakotas and earlier Durangos generally had 295 ft/lbs. Rams had 300 ft/lbs. Jeep Commanders and Grand Cherokees had a full 305 ft/lbs. This original 4.7 was sold through 2007. On its last year, the basic 4.7 also became E85 compatible.

Displacement= 4.7 Liters / 287 cubic inches

Bore x Stroke= 3.66" x 3.405"
Compression Ratio= 9.5:1

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

Fuel Induction= Sequential Multi-port Fuel Injection (SMFI)

Valvetain Arrangement=
Single Overhead Camshafts
16 valves in total

Stock Camshaft Specs=
244 degrees duration intake / 254 degrees duration exhaust
.443" lift intake / .429" lift exhaust

Factory Availability=
'00-'07 Dodge Dakota
'00-'09 Dodge Durango
'02-'07 Dodge Ram 1500
'06-'07 Mitsubishi Raider
'07-'09 Chrysler Aspen
'99-'09 Jeep Grand Cherokee
'06-'09 Jeep Commander

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