sorry guys last camshaft question...

Discussion in 'Classic Mustang Specific Tech' started by 1973mach1, Dec 13, 2003.


  1. 1973mach1

    1973mach1 New Member

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    Specifications:
    * Advertised duration: 270 intake/270 exhaust
    * Duration at .050 in. cam lift: 224 intake/224 exhaust
    * Gross valve lift: .519 in. intake/.519 in. exhaust
    * Lobe separation: 110 degrees
    * RPM range: 1,800 to 5,800
    * Mild rough

    Is this too wild for the stock 351c 2v with stock springs and FMX tranny with stock stall?

    Thanks,
    Jim
  2. SL 1993 R

    SL 1993 R Founding Member

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    make sure you change out your springs with your new cam.. that one would sound lumpy... the Clevelands respond nicely to a split duration, favoring the exhaust..
  3. D.Hearne

    D.Hearne Banned

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    I just looked up the stock spring specs on the 2bbl Cleveland and they're a little weak for that kind of cam, even when new, yours aren't I'm sure. Better upgrade your springs. Get a spark plug adapter to connect an air hose and a spring compressor and change the springs without pulling the heads. Do this AFTER the cam break-in though. Those old weak 2 bbl springs will be easier on the cam during break-in.
  4. 1973mach1

    1973mach1 New Member

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    Is it tough to change the valve springs without taking the heads off for a beginner? Whats the air hose do? I do have a valve spring compressor and air hose.

    Thanks
    Jim
  5. brads91

    brads91 New Member

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    The air hose pressurizes the combustion chamber so that the valve doesnt fall when you remove the springs.
  6. D.Hearne

    D.Hearne Banned

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    It's not a difficult or complicated job, even for a beginner. Go to your favorite local auto machinst and ask them to show you how to install the locks and retainers, so you'll at least know how to do it right. It'll take a couple extra hours at the longest to swap the springs in addition to the cam.
  7. Zooted_plus

    Zooted_plus New Member

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    might want to hook up a regulator to your spark plug adapter, when I changed my springs anything over 30 psi wanted to turn the motor over.
  8. 1973mach1

    1973mach1 New Member

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    you guys think a garage would kill me in price if I took it to them to change the springs without pulling the heads?

    Thanks,
    Jim
  9. D.Hearne

    D.Hearne Banned

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    Yes, they would. They'd end up pulling the heads, after "accidentally" dropping a valve. :rlaugh: :rlaugh: or more likely two valves :rlaugh: one from each head :lol: :lol:

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