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v6 225 fuel injection Conversion Question

Discussion in 'Early CJ5 and CJ6 Tech' started by kevin-cj3a, Mar 17, 2007.

  1. Mar 17, 2007
    kevin-cj3a

    kevin-cj3a New Member

    The Dalles, or
    Joined:
    Feb 12, 2007
    Messages:
    40
    Has anyone on here done a conversion? I'm wondering about cost, any kits out there to make the conversion easier.
    Thanks,
    Kevin
     
    kevin-cj3a, Mar 17, 2007
    #1
  2. Mar 17, 2007
    Mcruff

    Mcruff Earlycj5 Machinist

    Albertville, AL
    Joined:
    Sep 22, 2002
    Messages:
    5,349
    There are no direct conversions for the 225. There are several members that have done the mega squirt. I am currently collecting parts for the conversion myself, I have the control unit and fuel pump. I will be getting a GM throttle body from a 4.3 chevy astro van in the next month or so. That will get me started good. If you do some research o nthe mega squirt here:http://www.megasquirt.info/ you will find all you need to know.
     
    Mcruff, Mar 17, 2007
    #2
  3. Mar 18, 2007
    OrangeCJ5

    OrangeCJ5 Sponsor

    Taylorsville, UT
    Joined:
    Apr 29, 2003
    Messages:
    422
    I installed the Holley ProJection 2D kit on mine and it was really straight forward. Just make sure you get the optional closed loop kit. The new Commander 950 470 CFM kit would be an even better choice but it's about twice the money.
     
    OrangeCJ5, Mar 18, 2007
    #3
  4. Mar 18, 2007
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
    Joined:
    Mar 4, 2003
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    5,471
    I was looking into the FI and went with the TA 470. Have yet to find any reason to go ahead with FI no.

    Was going to go with the Holley kit like Orange did.
     
    Warloch, Mar 18, 2007
    #4
  5. Mar 19, 2007
    ScottP66CJ

    ScottP66CJ Member

    SoCal
    Joined:
    Oct 16, 2002
    Messages:
    59
    There is a fuel injection kit for the 225 available. AFI makes a kit specifically for the odd fire 225.

    I also run FI on my 225. Let me know if you have any questions.
     
    ScottP66CJ, Mar 19, 2007
    #5
  6. Mar 20, 2007
    kevin-cj3a

    kevin-cj3a New Member

    The Dalles, or
    Joined:
    Feb 12, 2007
    Messages:
    40
    Thanks everyone I will check them out.

    Kevin
     
    kevin-cj3a, Mar 20, 2007
    #6
  7. Dec 2, 2007
    Jamie73

    Jamie73 Member

    Colorado...
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    Dec 2, 2007
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    63
    Jamie73, Dec 2, 2007
    #7
  8. Feb 4, 2009
    cj2ajeeperjohn

    cj2ajeeperjohn Flatfender Jeeper

    California
    Joined:
    Feb 4, 2009
    Messages:
    1
    I have done several conversions to TBI injection for SB Chevy engines using stock GM components and a custom-programmed EPROM (to remove the speed sensor/EGR and knock sensor). I know there have been Megasquirt conversions but I am wondering if it is possible to use a stock GM EFI (circa 1990) and not have the conputer control the ignition, just the injectors. Has anyone tried this?
     
    cj2ajeeperjohn, Feb 4, 2009
    #8
  9. Feb 4, 2009
    windyhill

    windyhill Sponsor

    PA
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    Nov 4, 2006
    Messages:
    1,502
    Drop green71 a PM on here, he's messed around with Fuel inj. on a 225 quite a bit.
     
    windyhill, Feb 4, 2009
    #9
  10. Feb 4, 2009
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
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    23,596
    Yes, you don't have to have spark control. All the Howell systems are like that.

    However, I think the problem with the odd-fire and the GM EFI is in the ECM triggering, not the spark control. The odd-fire has unequal separation of the cylinders firing, and the trigger signal for the ECM comes from the tach signal (?? or some such). The GM ECU can't deal with the uneven triggering, while the Megasquirt can ... or something like that.

    This has been discussed before - if you search through the posts in this forum for a distinct keyword like megasquirt, you should be able to find the previous posts.
     
    timgr, Feb 4, 2009
    #10
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