383/440 proclaimed horsepower ?

1968 -1970 Mopars

  1. pearljam724

    pearljam724 Well-Known Member

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    What was the approximate/proclaimed horsepower of a factory built 383 and 440 big block ?
     
  2. pearljam724

    pearljam724 Well-Known Member

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    Never mind. I found a large article on it
     
  3. BeepBeepRR

    BeepBeepRR Well-Known Member

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    There were a few different specs for each engine. There was a 383 2bbl, 383 4bbl and a 383 HP and likewise for the 440. Each version had a different HP rating.

    325 for the HP 4 bbl 383
    390 for the 440 HP 6 pak.

    Corrected now remove my red X lol
     
    Last edited: Jun 29, 2019
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    • 66 Sat

      66 Sat Well-Known Member

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      I thought the 440 bbl topped out at 375hp and only the 6 pack 440 was rated at 390?
       
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      • BeepBeepRR

        BeepBeepRR Well-Known Member

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        You maybe correct. I knew one version was 390 I forgot about the 6 pak.
         
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        • biomedtechguy

          biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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          440 HP x 4bbl = 375HP/480ft lbs torque
          440 6bbl = 390HP/490ft lbs torque
          383 HP 325HP as stated, w/440HP Heads and Cam
          What was the torque output of a 383HP?
          :popcorn2:
           
        • BeepBeepRR

          BeepBeepRR Well-Known Member

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          1966

          265
          Horsepower…….. V8-361 2 Barrel 4.125 x 3.375 361 9 265 @ 4400 380 @ 2400 45-65
          270
          Horsepower…….. V8-383 2 Barrel 4.25 x 3.375 383 9.2 270 @ 4400 390 @ 2800 45-65
          325
          Horsepower…….. V8-383 4 Barrel 4.25 x 3.375 383 10 325 @ 4800 425 @ 2800 45-65
          350
          Horsepower…….. V8-440 4 Barrel 4.32 x 3.75 440 10.1 350 @ 4400 480 @ 2800 45-65

          1967

          325
          Horsepower…….. V8-383 4 Barrel 4.25 x 3.375 383 10 325 @ 4800 425 @ 2800 45-65
          350
          Horsepower…….. V8-440 4 Barrel 4.32 x 3.75 440 10.1 350 @ 4400 480 @ 2800 45-65
          375
          Horsepower…….. V8-440 4 Barrel 4.32 x 3.75 440

          1968

          290
          Horsepower……… V8-383 2 Barrel 4.25 x 3.375 383 9.2 290 @ 4400 390 @ 2800 45-65
          300
          Horsepower……… V8-383 4 Barrel 4.25 x 3.375 383 10 300 @ 4400 400 @ 2400 45-65
          330
          Horsepower…….. V8-383 4 Barrel 4.25 x 3.375 383 10 330 @ 5000 425 @ 3200 45-65
          350 Horsepower.
          . . .. V8-440 4 Barrel 4.32 x 3.75 440 10.1 350 @ 4400 480 @ 2800 45-65
          375 Horsepower.
          . . .. V8-440 4 Barrel 4.32 x 3.75 440 10.1 375 @ 4600 480 @ 3200 45-65

          1969


          290 Horsepower.
          . . .. V8-383 2 Barrel 4.25 x 3.38 383 9.2 290 @ 4400 390 @ 2800 45-65
          330 Horsepower.
          . . .. V8-383 4 Barrel 4.25 x 3.38 383 10 330 @ 5000 425 @ 3200 45-65
          335 Horsepower.
          . . .. V8-383 4 Barrel 4.25 x 3.38 383 10 335 @ 5000 425 @ 3400 45-65
          350 Horsepower.
          . . .. V8-440 4 Barrel 4.32 x 3.75 440 10.1 350 @ 4400 480 @ 2800 45-65
          375
          Horsepower….. V8-440 4 Barrel 4.32 x 3.75 440 10.1 375 @ 4600 480 @ 3200 45-65
          390
          Horsepower…..

          1970


          290 Horsepower.
          . . . V8-383 2 Barrel 4.25 x 3.38 383 8.7 290 @ 4400 390 @ 2800 45-65
          330 Horsepower.
          . . .. V8-383 4 Barrel 4.25 x 3.38 383 9.5 330 @ 5000 425 @ 3200 45-65
          335 Horsepower.
          . . .. V8-383 4 Barrel 4.25 x 3.38 383 9.5 335 @ 5200 425 @ 3400 45-65
          425 Horsepower.
          . . .. V8-426 Two 4 Bar. 4.25 x 3.75 426 10.2 425 @ 5000 490 @ 4000 45-65
          350 Horsepower.
          . . .. V8-440 4 Barrel 4.32 x 3.75 440 9.7 350 @ 4400 480 @ 2800 45-65
          375 Horsepower.
          . . .. V8-440 4 Barrel 4.32 x 3.75 440 9.7 375 @ 4600 480 @ 3200 45-65
          390 Horsepower.
          . . ..

          1971 The beginning of the end Here comes the smog era...

          275 Horsepower.
          . . .. . V8-383 2 Barrel 4.25 x 3.38 383 8.5 275 @ 4400 375 @ 2800 45-65
          300 Horsepower.
          . .. .. V8-383 4 Barrel 4.25 x 3.38 383 8.5 300 @ 4800 410 @ 3400 45-65

          335 Horsepower.
          . .. .. V8-440 4 Barrel 4.32 x 3.75 440 9 335 @ 4400 460 @ 3200 45-65
          370 Horsepower.
          . .. .. V8-440 4 Barrel 4.32 x 3.75 440 9.7 370 @ 4600 280 @ 3200 45-65
          385 Horsepower.
          . .. .. V8-440 Three 2 Bar. 4.32 x 3.75 440 10.5 385 @ 4700 490 @ 3200 45-65
           
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          • Lefty71

            Lefty71 FBBO Gold Member FBBO Gold Member

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          • BeepBeepRR

            BeepBeepRR Well-Known Member

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            lol for some reason I just overlooked the 6 pak. But posted its HP rating. go figure.
             
          • biomedtechguy

            biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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            My best friend had a 70 4 speed, N96 Roadrunner back in 79-82. I hooked him up with the owner who sold him the car.
            My bud put a hydraulic cam (284°/.488)??
            Intake, headers, gear.
            It was a contender on a lot of "chance encounter" street races. Low 13 second car. A blast to ride in.
            My 70 V-code Roadrunner with cam, headers, 6bbl, 71 steel crank 440, manual transmission runs so strong it's almost like a different engine than the 71 440 4bbl in my 71 R/T Charger. It's the car, gear, rear end, all lighter, leaner, better, more tactile than the Charger was.
            383 and 440, both great engines.
            I'd like to see a 383 equipped in a similar manner as a 375HP/396 and see what kind of output the 383 would make.
             
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            • wagonman

              wagonman FBBO Gold Member FBBO Gold Member

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              IIRC the 375/396 had a solid cam and the big square port heads. Rated at 375 in a Chevelle and 425 in the Vette. We are building a 68 Chevelle 396 Hedders all the usual HP goodies, will see how it stacks up against my 68 440 R/R.
               
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              • biomedtechguy

                biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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                Aluminum intake as well...
                My curiosity is an "apples to apples" comparison of a similarly equipped 383.
                 
              • fratzog lover

                fratzog lover Well-Known Member

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                • Lefty71

                  Lefty71 FBBO Gold Member FBBO Gold Member

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                  Should rev a little easier and raise the rpm curve at a given horsepower, and not crank out quite so much torque. Still a blast i'm sure. I think we often forget what a popular engine it was.
                   
                • Lefty71

                  Lefty71 FBBO Gold Member FBBO Gold Member

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                  Thanks, that was a great thread.
                   
                • YY1

                  YY1 Well-Known Member

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                  wonder how B1 heads compare to those chevy "big port" heads?
                   
                • fratzog lover

                  fratzog lover Well-Known Member

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                  • biomedtechguy

                    biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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                    • oldbee

                      oldbee Well-Known Member

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                      One of my best buds had a ‘68 Satellite and he couldn’t stay with my Bee. He was rated 330hp, mine 335. Different drivers(?)
                       
                    • fratzog lover

                      fratzog lover Well-Known Member

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                      I miss him on FABO, he also did threads he called "match race" where he paired 2 musclecars from back in the day in a play by play style race. They were great. Paul was a racer from back in the day, and he made learning about that era so much fun.
                       
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