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Question on cam timing???

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  • Question on cam timing???

    Maybe a dumb question but when you say advance intake 6 degrees and retard exhaust 6 degrees. Advancing would be before TDC and retarding would be after TDC w a degree wheel??? Well 12 degrees at the crank anyway. Reason I ask is I recently purchaced a 92 z34 w a broken intermediate shaft that ran good just made noise from the timing belt. I removed the engine and replaced the shaft and degree'd the cams and now it runs poorly at low rpms but good at 3k and up. Im not sure if I have other problems or I did it wrong?? I'm not to excited to have to tear it down to 0 everything to be sure. Any help would be appreciated

  • #2
    When you say poorly, is it just not very ballsy but rips loose over 3k? If so, that's normal of the DOHC. And as for the 6/6 timing, that should be 6 degrees at the crank (3 at the cam), not 12.
    -60v6's 2nd Jon M.
    91 Black Lumina Z34-5 speed
    92 Black Lumina Z34 5 speed (getting there, slowly... follow the progress here)
    94 Red Ford Ranger 2WD-5 speed
    Originally posted by Jay Leno
    Tires are cheap clutches...

    Comment


    • #3
      oh wow!! so I guess I misunderstood the pics that sappyse107 posted for 12 degrees being 6 degrees at the cam. So when others talk about degrees they are refering to crank degrees (+6/-6) and not actual cam degrees?? I guess I need to get it straight so when I retime it I do it right. Thanks for the help.

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      • #4
        No problem That's why I go by the crank for my marks when I do my timing, even though I do have one of the few adjustable hold down tools.
        -60v6's 2nd Jon M.
        91 Black Lumina Z34-5 speed
        92 Black Lumina Z34 5 speed (getting there, slowly... follow the progress here)
        94 Red Ford Ranger 2WD-5 speed
        Originally posted by Jay Leno
        Tires are cheap clutches...

        Comment


        • #5
          Hey do have a pic of your adjustable hold down tool? I've heard them mentioned on here but am having trouble picturing how they work.

          Comment


          • #6
            This one isn't mine, but it's a good friends here on this board. I got one of them from the same batch John did.

            -60v6's 2nd Jon M.
            91 Black Lumina Z34-5 speed
            92 Black Lumina Z34 5 speed (getting there, slowly... follow the progress here)
            94 Red Ford Ranger 2WD-5 speed
            Originally posted by Jay Leno
            Tires are cheap clutches...

            Comment


            • #7
              Thanks for the pic it definitely would be easier to use that than a degree wheel and a depth mic on the cam flats.

              Comment


              • #8
                If you do come across one of the adjustable ones, be warned they are marked in CAM degrees, not crank degrees, so divide the number by 2
                -60v6's 2nd Jon M.
                91 Black Lumina Z34-5 speed
                92 Black Lumina Z34 5 speed (getting there, slowly... follow the progress here)
                94 Red Ford Ranger 2WD-5 speed
                Originally posted by Jay Leno
                Tires are cheap clutches...

                Comment

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