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Torque Converter

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  • #580411
    ShawnShawn
    Participant

      Alright I want to pick everybody’s brain here. I have a 1984 K10 with a 350 in it. Someone did a lot of work to the engine. Headers, 650 Holley Double pumper, Edelbrock Intake, and it has what I guess would be called a mild cam. The cam sounds good it gives the truck that sweet sounding rough idle but not too rough. Anyway I have been having a lot of issues out of it. Ever since I bought it it has been a dog when you hit the throttle. I mean a short, slow, fat, mentally challenged, 2 legged dog! Lol But anyway when i first got it it ran smooth but didn’t have any take off as I mentioned. After a few months I started having major issues. First a spark plug blew out on the Drivers side. I fixed that. Put new plugs and wires in it. Went through 3 rebuilt starters within 2 months so I bought a Brand New Starter and it hasn’t went out yet (fingers crossed). Then a rocker arm stud broke off on the passenger side. I fixed that. One of my buddies mentioned that the lack of takeoff power might be because whoever built up the engine and put the bigger cam in it might not have put in a stall converter. So my questions are: What could be causing all these issues? Valve lash? Timing? Also since I don’t know what size cam is in it what size stall converter could I install to help with take off power? Thanks for any ideas anyone can give me.

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    • #580488
      Rudy WilmothRudy Wilmoth
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        🙂 You may want to check you ignition timing with a timing light and see if base timing is off. You can also hold the light on the timing mark and check your timing advance by watching the timing mark and revving the engine. You may need someone to slowly move the gas pedal or the linkage under the hood and watch to see if the timing mark moves as the gas is added.
        From your initial information you may have carburetor problems also. It sounds like your power valve on your carburetor may be bad or need adjustment. Since carburetor experts are harder to find now days, you may want to purchase a repair manual on your carb and read to see how to test and repair your carburetor. Good Luck.

        #580521
        BillBill
        Participant

          I have seen your problem before. To me you have 2 choices, either replace the camshaft with something lass radical or replace the torque converter. Since it broke a rocker stud I would be replacing the camshaft as I’m sure the valve train is not reliable enough to take the higher lift camshaft.

          Knowing what stall speed converter is needed would take an engine dynamometer to know where the torque curve begins.

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