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Thread: Moser axles

  1. #1
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    Moser axles

    Moser 12 bolt axles, 30 spline chrome moly. Any idea how much HP they are good for? Yes, I twisted one.
    And keep in mind that it's automatic and 3.42 gears.
    Last edited by 55 Tony; 04-18-2018 at 03:14 PM.
    Tony

    1955 Bel Air Sport Coupe

  2. #2
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    Sure they are chrome moly aftermarket axles? They shouldn't twist with your power level and gearing, especially with an automatic and limited traction.

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    Quote Originally Posted by Rick_L View Post
    Sure they are chrome moly aftermarket axles? They shouldn't twist with your power level and gearing, especially with an automatic and limited traction.
    First off the traction was excellent, real slicks that hooked really great. Second, how would I know if they really chrome moly?
    And back to the original question ... how much HP would it take to twist one?
    Tony

    1955 Bel Air Sport Coupe

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    Suggest you talk to Moser.

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    Moser says all their axles are made of 1541H alloy, not chrome moly.
    I found this and I think it is what I want:
    4340
    is designated as chrome-moly and is noted for its ability to absorb shock of split-second acceleration. This particular grade is widely used in aftermarket shafts as it is known for its strength and affordability.
    Or these are one step down I think:
    4140 is a chrome-moly steel and features improved hardness, greater elasticity and resistance to corrosion.
    Tony

    1955 Bel Air Sport Coupe

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    Quote Originally Posted by 55 Tony View Post
    First off the traction was excellent, real slicks that hooked really great. Second, how would I know if they really chrome moly?
    And back to the original question ... how much HP would it take to twist one?
    So you are going to a real dragstrip now.

  7. #7
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    Depends what you call real.
    Tony

    1955 Bel Air Sport Coupe

  8. #8
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    Yield strength of 4340 (chrome nickel moly) = 125000 psi
    Yield strength of 4140 (chrome moly) = 63000 psi
    Yield strength of 1541 (high manganese) = 51000 psi

    This will vary some depending on the actual heat treat, as will hardness and toughness.

  9. #9
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    Quote Originally Posted by Rick_L View Post
    Yield strength of 4340 (chrome nickel moly) = 125000 psi
    Yield strength of 4140 (chrome moly) = 63000 psi
    Yield strength of 1541 (high manganese) = 51000 psi

    This will vary some depending on the actual heat treat, as will hardness and toughness.
    What is the average chrome moly roll cage built from let`s say for an 8- 9 second car, or is it subjective?

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    8-9 second drag race cars use 4340 "normalized" tubing. Wall thickness and construction must meet SFI specs.

    Slower cars that require a cage can use 1020 mild steel tubing, wall thickness and construction must meet NHRA rules.

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