Chrysler announced today that the 2011 Dodge Challenger will receive its brand new V6 Pentastare engine. According to the manufacturer, the 2011 Challenger will be equipped with a higher horse power version of the 3.6-liter V6 Pentastar capable to deliver 305 hp at 6350 rpm (with 55 more hp than the current 3.5-liter V6) and a maximum torque of 268 lb.ft. at 4800 rpm.
Regarding the new engine, the new 60-degree 3.6-liter V6 is actually with 94 mm shorter than the 3.7 engine that was previously used in the Jeep Grand Cherokee.
This means that on the Challenger, Chrysler engineers were allowed to improve both the intake flow and exhaust flow resulting in more power.
Exhaust valves are 30mm in diameter and canted at 18.8 degrees. Combustion chamber volume is 52.7cc. The new engine will also be found on the 2011 Dodge Charger, but on this vehicle it will deliver “only” 292 hp.
The Pentastar engine that came with the 2011 Dodge Challenger was a reboot of sorts. Its design is totally revolutionary and represents a major deviation from the designs of the engines that came before it. For instance, while this V-6 engine’s predecessors had a total of 189 moving parts, the new Pentastar engine only had 32.
For Chrysler Powertrain, this meant a much expedited process in building. The reduced number of moving parts also means improvements in the powertrain’s quality. The company also realized savings in the manufacturing process, because there were a fewer number of otherwise high-cost components involved in the procedure.
It also allowed Chrysler Powertrain to acquire efficiencies as well. For instance, the Pentastar V6 had zero exhaust manifolds. This is because the new design incorporated into the engine directly via the cylinder head. In addition, the new Pentastar V-6 combined the upper and lower intake assemblies in previous engines into two separate assemblies.
This got rid of the 21 and 11 different parts in the upper and lower intake assemblies, respectively. In addition, the Pentastar engine brought down the number of fuel rails down to 2 from 14, while there will were only four variations in the camshaft in the new engine.
According to Chrysler Group LLC’s vice president for engine engineering, Bob Lee, the revolutionary design of the Pentastar was meant to be applicable not only for the 2011 Dodge Challenger and the 2011 Jeep Grand Cherokee but also in future powertrains.
Lee also said they looked forward to integrating new technologies to the Pentastar V6’s design in the future, as they seek to improve on the engine’s already impressive performance and excellent fuel efficiency. In addition, Lee specified that the engine is designed not only for vehicles like the Dodge Challenger, but in passenger cars, mini-vans and sports utility vehicles (SUVs) as well.
The Pentastar V-6, whose output was rated at 305 horsepower, replaced seven V6 legacy engines from Chrysler’s portfolio at that time. The engine was placed on front, rear and all-wheel drive models of the Dodge Challenger.