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14.0 cylinder kits in ddec4 12.7

Discussion in 'Trucks [ Eighteen Wheelers ]' started by catwrench55, Sep 24, 2016.

  1. Sep 24, 2016 #1
    catwrench55

    catwrench55 Light Load Member

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    Just curious if you could use 14.0 piston kits on a 12.7 crank? Assume you would have to use 12.7 rods. Not getting ready to tear into mine just curious.
     
    catwrench55, Sep 24, 2016
    catwrench55, Sep 24, 2016
    #1
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  3. Sep 25, 2016 #2
    swaan

    swaan Road Train Member

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    I think the block is different on a 14L also. Crank is different too..

    Never heard of anyone doing that before on a 12.7.

    I know on the cats people swap stuff around. 14.6/15.2/15.8 L .
    Dont think the detroits roll like that thou.

    You could always find a ddec5 14L and just build it up like the ddec4 if you know what im saying. Lots those engines around and they run real good to once "Fixed". ........
     
    swaan, Sep 25, 2016
    swaan, Sep 25, 2016
    #2
  4. Sep 25, 2016 #3
    magoo68

    magoo68 Road Train Member

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    Isn't it the stroke that determines the difference between 11.1 12.7 and 14 litres .. I was under the impression all had the same bore???
     
    magoo68, Sep 25, 2016
    magoo68, Sep 25, 2016
    #3
  5. Sep 25, 2016 #4
    catwrench55

    catwrench55 Light Load Member

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    I know the stroke is longer "different crank" but got the impression the bore was bigger too. Also found where someone tried the 14.0 crank and it wouldn't quite make the turn with rods attached in 12.7 block.
    And your right if mine but the dust I'd prob look for a good ddec5 take out and build it to work right.
     
    catwrench55, Sep 25, 2016
    catwrench55, Sep 25, 2016
    #4
  7. Sep 25, 2016 #5
    swaan

    swaan Road Train Member

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    Its the bore and stroke thats bigger.
     
    swaan, Sep 25, 2016
    swaan, Sep 25, 2016
    #5
    catwrench55 Thanks this.
  8. Sep 26, 2016 #7
    rebel127

    rebel127 Light Load Member

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    Unfortunately there is no factory rod that will let you use the 14L pistons in the 12.7. The 12.7 and 14L share the same length rod. The pin height of the piston is determined by the stroke.
     
    rebel127, Sep 26, 2016
    rebel127, Sep 26, 2016
    #7
    magoo68, prerunner404 and catwrench55 Thank this.
  9. Mar 12, 2019 #7
    Rorro

    Rorro Bobtail Member

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    Rebel can I have your phone number
     
    Rorro, Mar 12, 2019
    Rorro, Mar 12, 2019
    #7
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