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V6: direct injection, turbos?

by David Zatz on

According to Allpar sources, Chrysler has resumed work on its original plans for the Pentastar V6 engine series: direct injection and forced induction.

Given the Tier 3 Gasoline Sulfur program, which will slash the sulfur content of gasoline once again, some observers do not expect Chrysler to use direct injection in the United States until 2017; however, given that General Motors and other companies have used the technology in the U.S. already, Chrysler may be planning on an earlier debut. The use of direct injection may explain rumors that the Pentastar engines are to get horsepower boosts… though not soon enough, apparently, to be seen in the 2015 Dodge Charger and Challenger.

Sources also claim that Chrysler is working on its own turbocharged Pentastar V6, an effort completely separate from Maserati/Ferrari’s work. Fiat’s high-performance car companies reportedly used the Pentastar V6 as a basis for the V6 used in the Ghibli, but with extensive changes that extend to the block itself.  The 2009 plan for the Pentastar included both twin-turbo and single-turbocharger versions; a supercharged version was also rumored.

Update: a source reported that the Pentastar is being tested with single and dual turbochargers, and with a supercharger. It seems unlikely that all three would be used; more likely, the company is testing different configurations for drivability, durability, fuel economy, and cost, and will end up with one supercharged or single-turbo version, and one twin-turbo. Using a V6 in the upcoming mid-sized rear wheel drive car, rather than a V8, would likely slash Dodge’s development costs, since Alfa Romeo is highly unlikely to use a V8.


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