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  1. #1

    All Detroit Diesel Kids, need your engine data

    All Detroit Diesel Kids

    I’m finishing up my personal notes on Detroit 2 stroke tune parameters.
    I hope to combine this data and insert it into my final notes (maybe book).
    Please reply with your engine model, supposed tune HP, injector size or part number, turbo spec or part number and if bypass blower or not.
    I’m really needing air pressure readings after turbo and air box pressures at WOT.
    Lots of DDC owners do not have this data unless during a survey, If available, I can use this data.
    Any DDEC data if available is usable also.

    My personal trials are after air box pressures / HP tune. All data is appreciated.

    I will bump this tread from time to time to keep new members contributing.

    Thx
    Captain Ralph

  2. #2

    Re: All Detroit Diesel Kids, need your engine data

    This would be some great info. I'd also like to know egt temps (and location of egt sensor) for detroits. When overpropped we were seeing egt's of 900deg++ Once more appropriately propped the egts dropped to 800deg max.

    Our egt sensors are in the exhaust flange that clamps to the turbo 8v92TI @ 600hp
    SOUTHPAWS
    1986 52C Hull #391 8v92TI
    PENSACOLA, FL

  3. #3

    Re: All Detroit Diesel Kids, need your engine data

    J&T 671n. 260 hp. N70 injectors.
    Robert
    MANCHIONEAL
    1973 43DC #365
    Mattox Creek, VA

  4. #4

    Re: All Detroit Diesel Kids, need your engine data

    1998
    692 ddec 625 hp
    rb5236138 unit injector
    mitsubishi turbochargers
    transmissions zf 3.11 gear ratio

    2350 rpm wot
    1950 rpm 70% load
    50.50 gph at 1950 rpm
    5 bladed 36" x 52.9" wheels balanced & blue printed to class 1 iso, reduced from 36" x 55.5" to reduce loadfrom 80+ to 70-74
    Jackpot

    98 43' CNV # 27

  5. #5

    Re: All Detroit Diesel Kids, need your engine data

    1972 43' DCFB Hatt
    6-71N J&T 310 hp, Engine Mo# 6055M
    Injectors N80-"A"

    I have spec pages of
    1) all torques
    2) "slicks" and graphs of power/torque curves
    3) the Hatteras "Vital Information" Page
    4) My Excel page of fuel filters, etc.
    I could photo copy and attached as desired.
    50 Years on the Great Lakes...

  6. #6

    Re: All Detroit Diesel Kids, need your engine data


  7. Re: All Detroit Diesel Kids, need your engine data

    SCUSI 12V71 port engine tag
    Attached Images
    SCUSI
    1981 55C
    Hull #: 328

  8. #8

    Re: All Detroit Diesel Kids, need your engine data

    Some HP questions just came up on another thread that reminded me of this old, ongoing project.
    Thought I would start sharing what I have assembled so far.

    These list are just designed to help us together when we talk about Detroit engines since there are so many tunes out there.
    Constructive input is welcome.


    Quick list for 12V71s.

    P 7xxx Port serial number range
    S 7xxx Stb serial number range

    XXX / XXX
    SAE or Flywheel H P / Shaft H P

    NA Natural Aspirated
    TI Turbo & Inter-cooled
    TA Turbo & After-cooled

    Allison, TD or ZF clutch

    Rated RPM and some additional notes

    Injector size.







    P 7122-3000, 7122-3300
    S 7122-7000, 7122-7001

    359 / 340 NA TD 340SHP continuous @ 1800
    N55

    456 / 437 NA TD 2100rpm
    N65

    525(500?) / 480 NA TD 2300rpm, 340SHP continuous @ 1800
    N70

    525 / 490 NA Allison
    N70


    P 7122-3300, 7122-3302
    S 7122-7300, 7133-7302

    539 / 510 TI TD 2100rpm
    N70

    675 / 650 TI TD
    N90

    750 / 720 TI TD 2300rpm
    7N95

    7122-7303 RH only

    539 / 510 TI ZF 2100rpm
    N70

    850 / 825 TI ZF Covington
    9215

    870 / 840 TI ZF 2300rpm
    9215

    800 / 775 TA ZF
    7015

    900 / 870 TA ZF
    7030
    Last edited by Captain Ralph; 08-29-2021 at 01:13 PM.

  9. #9

    Re: All Detroit Diesel Kids, need your engine data

    8v92's TIC 735hp 145 injectors 2 dry turbos

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