12.7 to 14 litre

Discussion in 'Trucks [ Eighteen Wheelers ]' started by 86coe, Nov 8, 2019.

  1. 86coe

    86coe Bobtail Member

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    Jan 26, 2018
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    Hi, I've got a 12.7 Detroit and im wanting to bump up the power significantly and figure it would be better to just start with a 14 litre to begin with because my 12.7 doesn't have piston Oilers. My 12.7 injectors are getting worn as well and I was wanting to go with a cam and turbo if I upgraded the engine so why not just put together a 14 litre? I guess what I need to know is what I need to bolt the 14.0 in place of my 12.7? Ecm the same? Will my valve cover and other parts work? Just trying to get as much info before I try and find a 14 litre. Thanks
     
    Last edited by a moderator: Nov 8, 2019
    Reason for edit: Remove phone number
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  3. TruckerPete1990

    TruckerPete1990 Road Train Member

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    Why would you want to? Isn't a 14 Litre a EPA truck? A EPA engine to overhaul is around 30k You can pretty much rebuild a 12.7 with new everything for 15k... What kind of power are you talking about?
     
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  4. OldeSkool

    OldeSkool Road Train Member

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    AMEN!!!!! I have a 14 liter and wish it was a 12.7. No more power than my friends 12.7 and makes nearly a mile to a gallon worse. And yes it's deleted.
     
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  5. TruckerPete1990

    TruckerPete1990 Road Train Member

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    a EPA engine isn't cheap to rebuild.. Wasn't sure if they made a 14L That didn't have that Emissions Junk. I Was in a Detroit shop on tuesday getting parts for my APU. They had a sign posted on pricing on rebuilds. 12.7 WAS the CHEAPEST BY FAR. These other Detroit engines were very high over 25k..
     
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  6. TruckerPete1990

    TruckerPete1990 Road Train Member

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    Gentry Arkansas
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    Yeah im rebuilding my isx engine... Lost over 1.5 MPG right now with because of oil usage.. Its gonna be about 22k With a new head.. No way im reusing a head. This is at a smaller shop thats not counting cam or rollers if anything else is found bad
     
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  7. nikmirbre

    nikmirbre Road Train Member

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    a rebuild on a 14l around these parts is 15-16k
     
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  8. tnevin225

    tnevin225 Road Train Member

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    That 12.7 can't just be turned into a 14L. You already have one of the best engines out there. I would just get it rebuilt and put some good upgrades like a bigger turbo, polished and ported intake,ect,ect. Then top it off with an awesome custom tune and that truck will rock.
     
  9. AModelCat

    AModelCat Road Train Member

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    Detroit made a Series 60 in 11.1L, 12.7L and 14L. All were available before EGR.

    BTW, the EPA has been regulating on-road diesel engine emissions since at least the early 90's. Why do you think they went to electronic controlled engines? Mechanical fuel pumps were not precise enough to control the emissions output, so electronic unit injectors were developed for more precise fuel control.
     
  10. blairandgretchen

    blairandgretchen Road Train Member

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    There’s a good Facebook page on Detroit S60 - I just read and absorb most of the time.

    You might get some good knowledge out of it.
     
  11. Brettj3876

    Brettj3876 Road Train Member

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    Isn't it drilled for piston oilers? Good ecu tune and s475 is a good starting point
     
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