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  1. #1
    Carb and Points!
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    carb to TBI converions, Marine application

    hello all,
    So I have thrown in the towel on the carb for my boat and decided to go EFI with a TBI system.

    I spent several hours at the junk yard over the weekend looking for parts. I was able to find a PCM its a 16168625 BDJZ (for $20)
    still looking for a Dizzy & TBI hat.

    I used this thread and got the bin file that matched my ecu with the "Advanced $E6 TP5 v250.xdf" and opened it in tuner pro.
    http://www.gearhead-efi.com/Fuel-Inj...Information-E6

    i see a lot of $E6 or $EE here, can someone explain what that means or a link to something i can read?

    Does anyone know if the dodge TBI has will work? I can find those all day long at the junk yard, all the chevys have been picked clean. found several bodies on a 4.3L but they were all missing the injector setups

    in my application I will need to turn off the Automatic transmission (Manual transmission check box) turn off EGR, turn off purge and any emission related items as they do not exist in a boat. any correction for AC.

    for starting out I think I would like to set it to run open loop as i'm still working on the o2 sensor part. the exhaust is water cooled so i have to get a bung through the water jacket.

    Another challenge will be how the ECU adjust for temperature. The boat has a 160F T-Stat and will struggle to get to that temp

    these bins/ecus have a lot more to them than the old OBD1 BMWs played with back in college. any help/guidance would be appreciated

  2. #2
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    Howdy.

    The strange codes preceded by a dollar sign such as $E6 and $EE are identifiers. They're called the mask ID or simply the mask. When working with tuning tools one must match the .bin with the editor, datalogger, and the ecm/pcm.

    The TBI ecm will operate two low impedance injectors. I don't happen to know what the impedance is for the Dodge / Holley TBI injector but if you find it we can answer the compatibility question.

    The ecm will operate at 160 degrees. You can adjust engine operating parameters to get the most from the engine at 160 degrees. Some folks using automotive TBI in a marine application have even figured out how to install an O2 sensor.

    What size and HP engine are you working with?

  3. #3
    Carb and Points!
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    Quote Originally Posted by 1project2many View Post
    Howdy.

    The strange codes preceded by a dollar sign such as $E6 and $EE are identifiers. They're called the mask ID or simply the mask. When working with tuning tools one must match the .bin with the editor, datalogger, and the ecm/pcm.

    The TBI ecm will operate two low impedance injectors. I don't happen to know what the impedance is for the Dodge / Holley TBI injector but if you find it we can answer the compatibility question.

    The ecm will operate at 160 degrees. You can adjust engine operating parameters to get the most from the engine at 160 degrees. Some folks using automotive TBI in a marine application have even figured out how to install an O2 sensor.

    What size and HP engine are you working with?
    this will be a stock Chevy 350. I'm was trying to pull everything from a TBI chevy 350 so it will fire up and have the base maps to start with.

    for an O2 adapter i was going to do this
    http://howellefi.com/general-motors/...or-marine-use/

    or see if I have the room to drill and tap in the gap between the head and manifold. I like the above solution better as it gets an average on the reading vs 1 cylinder. not sure how much heat the o2 can take with it being right at the head/manifold transition.
    333853d1193931165-marine-fuel-injection-marineo2.jpg

    how can I tell if I have a $E6 or a $EE?

    I know you have to match .bin & .xdfs from the link I 1st posted it looks like they all work together. I have not opened the .zip files where it looks like someone is adding features (fan control)

    a new distributor form rockauto is only $60 and a coil is ~$15. the TBI hat though is $380 so i'm still trying to source that.

    i found the connectors to make my own wiring harness.
    http://www.mouser.com/ProductDetail/...lZCOa3cZvqE%3d
    http://www.mouser.com/ProductDetail/...Kcasx2ZZHzQ%3d
    http://www.mouser.com/ProductDetail/...bkGFrG1l89I%3d
    http://www.mouser.com/ProductDetail/...XPzOh97SvHc%3d
    http://www.mouser.com/ProductDetail/...%2f4ZAe21VE%3d

    I will probably make a harness that goes from those to a CPC connector (mill spec, twist lock with gaskets) put all the electronics in a water tight box and find a spot to mount that.

  4. #4
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    Clipboard01.jpg
    this is what the ECU i found looks like.

    this is the bin file i'm looking at right now, the BDJZ matches.
    BDJZ 93 C-K Truck 5.7TBI 4l60e with 3.73 or 3.42 gears.BIN


    looks liek the Dodge TBI injectors as 10-12 ohm where the chevy TBI is 1-2 ohm. so not gonna work is my guess.... unless I can use the body then just get 2 new stock injectors? i'm going to have to make an adapter plate for my motor anyways (spread bore to TBI)

    i called the junk yard and the chevy truck with all the parts i need will be put in the lot tomorrow (was unprocessed when i went in Saturday) so I will try to get the TBI hat and distributor and coil after work tomorrow.
    Last edited by keaton; 07-18-2017 at 03:58 AM.

  5. #5
    Super Moderator dave w's Avatar
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    I see some challenges using a 16168625 PCM for a Marine Carburetor to a Marine TBI conversion. Usually the 1227747 ECM is the Marine TBI computer of choice. The 1227747 has a park switch input, which eliminates the need for a Vehicle Speed Sensor. Setting the 1227747 park switch to Ground (battery -) tells the 1227747 the vehicle is in park. The 1227747 will operate an engine when the 1227747 thinks the engine is in park.

    The 16168625 does not a simple park switch input. It might be possible to configure the transmission gear position inputs of the 16168625 to indicate park. (That's something I have not tried to do) The 16168625 uses Vehicle Speed input to select near idle or off idle fuel and spark tables. It might be possible to configure the vehicle speed parameters along with the TPS% parameters to "lock" the 16168625 into using the Off Idle fuel and spark tables only?

    I'm sure a Marine engine would run with a 16168625 without a Vehicle Speed input, I'm just not sure how well the engine would run? Perhaps there is a way to have a GPS supply the 16168625 with a vehicle speed input?

    dave w

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    how can I tell if I have a $E6 or a $EE?
    You do not have $EE. That is from the 8051 ECM used with LT1 engines. The ecm is completely different.

    BDJZ is $E6. Go to google and type BJDZ site:gearhead-efi.com and you'll get good results.

    The 12 Ohm injectors could be used but there are a number of values that will need to be changed including the injector corrections and fuel flow rate.

    If the calibration you're using can be set for non-electronic transmisison then you may be able to use a simple park input.

    I think the wise choice is to get as much as possible from the junk yard truck.

  7. #7
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    Quote Originally Posted by dave w View Post
    I see some challenges using a 16168625 PCM for a Marine Carburetor to a Marine TBI conversion. Usually the 1227747 ECM is the Marine TBI computer of choice. The 1227747 has a park switch input, which eliminates the need for a Vehicle Speed Sensor. Setting the 1227747 park switch to Ground (battery -) tells the 1227747 the vehicle is in park. The 1227747 will operate an engine when the 1227747 thinks the engine is in park.

    The 16168625 does not a simple park switch input. It might be possible to configure the transmission gear position inputs of the 16168625 to indicate park. (That's something I have not tried to do) The 16168625 uses Vehicle Speed input to select near idle or off idle fuel and spark tables. It might be possible to configure the vehicle speed parameters along with the TPS% parameters to "lock" the 16168625 into using the Off Idle fuel and spark tables only?

    I'm sure a Marine engine would run with a 16168625 without a Vehicle Speed input, I'm just not sure how well the engine would run? Perhaps there is a way to have a GPS supply the 16168625 with a vehicle speed input?

    dave w
    I used the 7427 with a simple park/neutral switch, it is simply a matter of enabling the 700r4 logic. Auto trans/TCC only switches. Input signal on one wire of the 3 (forget which) and it works great.

    If it is a Mercruiser several companies make an adaper that sandwiches between the marine manifold and riser and holds an O2 sensor.

    I did a TPI 7730 on a TPI marine conversion and simply wired the kill switch into the coil output between the module and coil. Worked beautifully! used a newer marine thermostat housing off a Vortec L31 marine engine thay had the same bolt pattern angle.

    7427 works in Open Loop only very well too!

    I never use different Idle/Off Idle tables. Would be easy to set the switch over to Zero MPH and disable the Idle parameters completely.
    Last edited by Fast355; 07-19-2017 at 08:32 AM.

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