03-06-2020, 01:16 PM
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Senior Member
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Join Date: Mar 2017
Location: ABQ, New Mexico
Posts: 36,633
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So what is the real horsepower and torque ratings for the Chrysler 340 Magnum and 340 Six Pak? In a recent engine build two 340s were built exactly as Chrysler spec'd them out. Then each was put on a dyno. The results . . . 320 horsepower at 5,500 rpm and 368 lb-ft at 3,500 rpm versus the advertised 275 horsepower at 5,500 rpm and 340 lb-ft at 3,200 rpm and 352.1 horsepower and 395.9 lb-ft at 3,200 rpm versus the advertised ratings of 290 HP @ 5,000 and 345 lb-ft @ 3,400 for the 340 Six Pak.
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