Help me sort my combo

Big Block A body Tech

  1. 69conv

    69conv leaky gasket FABO Gold Member

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    I wish everybody ran as ethical a business as you do Dwayne but I have been reduced to "trust but verify".My experience with shops. My first motor was put together with loose crank tolerances, a cam that was installed dot to dot when the cam was cut 5 degrees retarded and assembled with no break in lube on the fuel pump push rod resulting in no pump actuation in no time flat. My second motor by a different shop was delivered to me with stop leak pellets in the water pump housing and apparently a dropped head cause the exhaust stud broke off when I rested the header on it. When I dropped this motor off the girl behind the counter (who happens to be the wife of the owner and pays the bills) says this motor is gonna need new pistons, block bored and a bunch of new parts before the block was even disassembled. When I explained the motor had only 2500 miles on it she said we'll just put the parts on the invoice and remove them if you don't need them. Not only were all the parts necessary (surprise) but they double billed me on some parts. BTW they got started in February and promised 6 weeks so what day is it? Sorry for the long answer.
     
  2. PRH

    PRH Well-Known Member

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    I would have loaded my stuff up right then.
     
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    • roccodart440

      roccodart440 Well-Known Member

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      Well, I usually take the stock heads, pushrods and rockers and throw them in the trash, but as I remember the stock rockers on all (or nearly all) RB engines were non adjustable rockers and the pushrods are rounded on both ends. The adjustable rockers will have a ball in cup style adjuster.

      So the short answer is no.
       
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      • Garrett Ellison

        Garrett Ellison Amateur driver on public roadway, do not imitate..

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        Yes, and while there are sometimes pushrods available off the shelf, when you start to add in things as custom ground cams with reduced base circles and milling of head and deck surfaces or tolerance stack up, custom length pushrods are the only way to come up with the correct rocker geometry.
         
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        • AJ/FormS

          AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s FABO Gold Member

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          On that note, does anyone make adjustable pushrods that you can leave in the engine, and run to say 6500 or better?
           
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          • Garrett Ellison

            Garrett Ellison Amateur driver on public roadway, do not imitate..

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            That’s a very good question brother AJ. I would think that Manton or Smith Brothers would probably be the go to on that. The H-D evolution motorcycle engines I got to help out on use adjustable pushrods for lash adjustment for both the factory hydraulic rollers. The S&S motor with triple valve spring with double dampers on a solid roller cam with sky high seat pressure used a set of Jim’s aftermarket adjustable pushrods that are usually reserved for nitro Harley. It’s doable, but don’t know what it would cost.
             
          • famous bob

            famous bob mopar misfit

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            I did the same thing, even threw the stock rods away. (big block)
            The early solid pushrods "DO" make a heck of a center punch. They must have had some good mat`l in them .r
             
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            • IQ52

              IQ52 Well-Known Member

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              In 1979 I was running Smith Bros. 6,200 rpm in my street stocker on the circle track. I know we were using some as far back as 1959.
               
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              • roccodart440

                roccodart440 Well-Known Member

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                I can't complain about the stock rods. I've used them twice but I beam polished them, shot peened and resized with ARP waveloc bolts.
                 
              • famous bob

                famous bob mopar misfit

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                Yeah their certainly heavy and strong enough.
                I used a RACE balanced stroker kit w/ 7.1 rods from hughs engines, very well balanced, cant even feel it running on a solid motor plate.
                 
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                • 69conv

                  69conv leaky gasket FABO Gold Member

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                  FINALLY dyno time. Any guesses? New cam in post 71.
                   
                  Last edited: Jun 19, 2019 at 9:31 PM
                • roccodart440

                  roccodart440 Well-Known Member

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                  425hp/500tq

                  I think you'll like that new cam a lot more than the .509.
                   
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                  • 69conv

                    69conv leaky gasket FABO Gold Member

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                    Hope so. How will it be different?
                     
                  • roccodart440

                    roccodart440 Well-Known Member

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                    It won't have that nasty ratty idle the .509 has and it will have a broader powerband.
                     
                  • 69conv

                    69conv leaky gasket FABO Gold Member

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                    My dyno was supposed to be today but apparently its delayed again. I so want to see what she will do. Schneider said 1800 to 6k.
                     
                  • roccodart440

                    roccodart440 Well-Known Member

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                    Unless he plays games with his dyno it will make peak power well before 6k.

                    1800 is probably ballpark for the curve to start but I would never start a pull at 1800. I'd start your pull at 2500min
                     
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