Logo
Results 1 to 6 of 6
  1. #1

    Default EFI conversion on a 5.8L

    Hi,
    I'm back working on my EFI conversion and could use some advice. The boat is a 96 Correct Craft Ski Nautique with a PCM 5.8l. I'm posting here because my question is about a OMC cobra EFI set-up, and I'd like to get the attention of O2batsea, hoping he'll chime in.

    I had intended to do the conversion to EFI using Megasquirt, but came across and purchased a complete EFI set-up from an OMC Cobra 5.0 out of a 95 Four winns stern drive. My intention was to use it as a guide for layout and then sell it when I was done. But as I look at it, I realize that most of what I need is already there. Mostly the fuel pumps and filter, fuel reservoir, brackets etc.

    Does anybody know if the systens for the 5.0 and 5.8 are identical, or where the differences would be? It appears that the fuel pumps are the same, and also the same on a 454ci motor, so I'd believe they would supply enough fuel. At first glance, I thought the distributors were the same for the boat motors, but I was reading some bad information. I'm guessing I'll need a distributor from a 351W boat motor. How about the ECU, or EEC? I can't find any parts lists to compare part numbers for the OMC motors, and I'm not sure Volvo Penta had any 5.0's in their applications.

    I'd appreciate any help I can get.
    Thanks,
    Don

  2. #2
    Join Date
    May 2010
    Location
    DC Burbs/Maryland Eastern Shore
    Posts
    1,823

    Default Re: EFI conversion on a 5.8L

    Hi don. PM me and I'll send you my celly.
    Short answer is yes. 302 and 351 feuling system identical. ECU gets the pulse signal from the distributor for injector firing.
    An excellent refernce manual for understanding the whole shootin' match is http://www.amazon.com/Ford-Injection...engine+control
    Last edited by o2batsea; 02-04-2015 at 07:29 PM.
    Practicing the ancient art of ren-ching

  3. #3
    Join Date
    Sep 2010
    Location
    Jersey Shore
    Posts
    5,948

    Default Re: EFI conversion on a 5.8L

    Quote Originally Posted by o2batsea View Post
    Hi don. PM me and I'll send you my celly.
    Short answer is yes. 302 and 351 feuling system identical. ECU gets the pulse signal from the distributor for injector firing.
    An excellent refernce manual for understanding the whole shootin' match is http://www.amazon.com/Ford-Injection...engine+control

    The fuel mapping in the ECU is the same for the 302 and the 351? Really? I figured the mapping for the 351 would have a longer pulse with as not to run lean.
    Chris
    Dockside Marine Services
    Jersey Shore.
    Mercruiser/Mercury Certified
    Let the insanity begin.

  4. #4
    Join Date
    May 2010
    Location
    DC Burbs/Maryland Eastern Shore
    Posts
    1,823

    Default Re: EFI conversion on a 5.8L

    It's not a car engine! The ECU is indeed different, but the remainder of the parts are the same. I would submit that it would work with a 5.8 ECU without any hiccups.
    If one were to read the book I pointed to above, you'd know what will work and what won't.
    Practicing the ancient art of ren-ching

  5. #5

    Default Re: EFI conversion on a 5.8L

    If your looking for the ecu I got mine on Gt40marine.com
    they have them in stock and fast shipping

  6. #6

    Default Re: EFI conversion on a 5.8L

    You wouldn't happen to be the same Mike that owns this business? The business Zip just happens to be a close match to your user name?

    Quote Originally Posted by mike9812121298 View Post
    If your looking for the ecu I got mine on Gt40marine.com
    they have them in stock and fast shipping

Similar Threads

  1. 200 to 225 conversion
    By ipmarine in forum Johnson Evinrude Outboard Archive
    Replies: 15
    Last Post: 03-15-2009, 04:27 PM
  2. 400 to 800 conversion
    By manpower in forum OMC Sterndrive and Inboard Archive
    Replies: 6
    Last Post: 01-28-2009, 12:34 PM
  3. 25 to 20 conversion
    By chad_h in forum Johnson Evinrude Outboard Archive
    Replies: 7
    Last Post: 10-18-2006, 10:49 PM
  4. 43 to 350 Conversion
    By Justin From Colorado in forum Mercruiser Sterndrive Archive
    Replies: 3
    Last Post: 04-02-2006, 08:38 AM
  5. VRO conversion
    By Chris Hofman in forum Archive 2003-2009
    Replies: 1
    Last Post: 07-17-2003, 10:01 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •