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  1. #1
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    Default Identify S&S cam for pan shovel

    I'd appreciate if someone had some information on this old S&S cam stamped 2340. The heads had spacers under the lower spring collars on the valve guides too if that is of any useful info
    Cheers


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  2. #2
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    Look at the other end
    That's just the gear, which can be pressed on and off and swapped at will. To match pinion gear lash and/or tweak valve timing.
    S&S has a great tech line, call them

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    Those numbers on the gear is all there is, nothing on the other end. Yeah I did email them, waiting for them to reply.

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    You can always measure the lobes subtract the base circles multiply by rocker ratio to get the lift numbers. Break out a degree wheel or at least a protractor to measure the timing itself.
    That gets a litle tricky as to where on the lobe "advertised" lift starts.
    If it's not a re-grind, the lift will probably help you find the cam on S&S's charts

  5. #5
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    Done some measuring and it has a .440 lift with 74" rockers, 0,460 with 80" rockers. Closest in the S&S chart is the 450S cam. So no high lift cam. Lobes looks pretty torquey. I guess I just need to run the motor to see how it behaves. It's funny PO said it was a bone stock 74" setup. It has big bore jugs, stroker flywheels and the heads are flowed so I need to inspect the heads a bit closer to see whats what. But why the use of spacers under the bottom spring collars, any idea?

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    Strokers usually like a bit of overlap, helps with kicking too. Big valves and ported heads don't need a lot of lift to flow well. Probably a good cam for you.

    Shims are to set the spring height. Not something many builders do anymore. Keeps seat pressures even. Coil bind is not really a factor with lower lifts.
    More critical is valve stem height to keep valve train geometry in check. And valve seal to collar clearance for a given lift so's you don't smash those seals.
    And of course valve to piston clearance.

  7. #7

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    Did anyone actually get an official answer on this cam, I tore my panhead down and found the same model number cam in my bike 2340

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