Disappointed in my 383 on the Dyno

Big Block A body Tech

  1. ir3333

    ir3333 Well-Known Member

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    I know a guy who bought the edelbrgock top end kit for his 383 RR.Can't remember the specs but the cam had a lot of duration.It sounded nasty and would scare women and small pets but wouldn't break one tire loose from a roll and was lazy at lo speeds but made good power at hi RPM.
     
  2. mopowers

    mopowers Well-Known Member

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    At some point the OP said it's got a hyrdaulic roller cam (Post 19). I doubt the OP knows what cam it actually has. It's just a bunch of speculation at this point.
     
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    • pishta

      pishta I know I'm right....

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      a running 383 could return you some coin. Inexpensive stroker (Eagle, KB) in a 400 or a 440 would womp that 383.
      parasitic losses are real: auto's and rad fans suck the power!

      Drivetrain Power Loss - Car Craft Magazine
       
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      • Rassnasty82

        Rassnasty82 Well-Known Member

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        I thought if it was alumn it was an OD but i am not sure. What i can tell you on the highway going 60 mph my rpm's are around 2k
         
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        • j par

          j par Well-hung Member

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          If you're looking at the shifter ears on the outside of the transmission and the one all the way towards the front is pointed upwards as opposed to the other two it's likely it's an overdrive... And two grand at 60 MPH with 391 gears and a reasonably sized tire like 28 in or so it's likely an overdrive...
           
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          • j par

            j par Well-hung Member

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            1st gear should be a 309 ratio and get out of the hole nice and quick but second gear probably lasts forever...
             
          • thesiren74

            thesiren74 Well-Known Member

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            What brand Dyno?
             
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            • Rassnasty82

              Rassnasty82 Well-Known Member

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              DynoJet
               
            • aaronk785

              aaronk785 Well-Known Member

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              I do agree. The numbers aren’t bad. And a cam change itself isn’t going to get u to 400 at the wheels. Could get u closer though. I thought cam was hydraulic rpm. Guess I read wrong.
               
            • Rassnasty82

              Rassnasty82 Well-Known Member

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              I was told it is a hydraulic roller cam from edlebrock to go with the top end performer rpm kit. The shop i had it at yesterday that did the dyno tuning said its a very mild cam. I know it would be better if i knew the specs of the cam but without tearing it apart, giving you guys what i know is all i can do.
               
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              • PRH

                PRH Well-Known Member

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                As far as I can tell, Edelbrock only sells one HR cam for a BB Mopar...... and it’s not a “small” cam........Especially for a 383.

                Part #2206.
                240/248@.050
                .540/.545 lift
                112lsa
                 
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                • 448Scamp

                  448Scamp Running Free

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                  They made aluminum cases and tail shaft housings for drag racing. It doesn’t have to be an OD transmission.
                   
                • d1970

                  d1970 TODAY IS A GOOD DAY TO HAVE A GOOD DAY

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                  this could be part of your problem. These days you have to check the heads for problems, that means take them apart. I've seen many aftermarket heads at my buddies shop that were new and they had problem like seat run out, tight guides etc. He checks all new cylinder heads before installing them
                   
                • Rassnasty82

                  Rassnasty82 Well-Known Member

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                  ok, so I actually reached out to the kid of the guy who owned the car prior to me and he stated it wasn’t a edlebrock cam after all and he’s almost positive it’s the cam below as that’s the box that was I the garage. See below

                  Crane BBM Hydraulic Roller Cam HR-222/339-2S-12
                  • Camshaft
                  • Hydraulic Roller
                  • Lift 0.509 / 0.528 in
                  • Duration 284 / 292
                  • 112 LSA
                  • 2200 / 6400 RPM
                  • Mopar B / RB

                  Hope this helps to give you an idea of where I am at
                   
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                  • 512Stroker

                    512Stroker We are all here because we are not all there.

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                    Can you run a compression test and tell us what the cranking rpm cylinder pressures are. This will give us a good idea of the engines potential.
                     
                  • Rassnasty82

                    Rassnasty82 Well-Known Member

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                    Yea, over the weekend I’ll get it
                     
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                    • 512Stroker

                      512Stroker We are all here because we are not all there.

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                      Nice street cam but that is not going to give you the panty dropping power you are after.
                       
                    • ir3333

                      ir3333 Well-Known Member

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                      What made you decide you need 400 plus hp at the rear wheels? Really, i think 330 at the rear wheels should be a tire fryer! Get a cam designed for the street with high lift and short duration and you'll have a ball...unless it's a quarter mile car. What are your gears and tire size?
                       
                    • Rassnasty82

                      Rassnasty82 Well-Known Member

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                      want to be able to take to the track once I relocate the springs in the rear and get some wider tires. It’s got 3.91 gears
                       
                    • ir3333

                      ir3333 Well-Known Member

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                      well now that cam is lookin' ok with 3.91 gears and a matching converter
                       
                    • Lefty71

                      Lefty71 Well-Known Member

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                      Thanks for reminding me.... sometimes I get lost and forget why we build these engines in the first place.
                       
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                      • Bewy

                        Bewy Well-Known Member

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                        Nick's garage dynoed a 383 & it only just busted 320 hp with a purple cam in it. This was on his engine dyno, not chassis dyno....
                         
                      • DrCharles

                        DrCharles Well-Known Member

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                        OK, so that 383 made 320 crank hp. Which purple cam... they range from .434 hyd to .690 mushroom solid... what are the rest of the engine specs? Heads?
                         
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                        • Dartnut

                          Dartnut Don't hate me because i'm beautiful

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                          I'm still trying to wrap my head around the statement that ''I can't find a 440 block for less than a grand''.
                          A whole running engine out of a New Yorker maybe, but just the block?
                          Look around, you should be able to find a standard bore block and caps that need machining for around 400 bucks or so.........
                           
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                          • PRH

                            PRH Well-Known Member

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                            The way I see it........ swap to a rowdier camshaft....... then basically......iiwii.
                            That might not actually improve the 1/4 mile times with a 4 speed and 3.91’s, but it would def get things closer to the point of getting passengers worked up.

                            Anything other than that, that will really make a “noticeable” difference in power....... won’t be very budget friendly.
                             
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