1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

Most Simple Engine Swap To Fuel Injected V6

Discussion in 'Early CJ5 and CJ6 Tech' started by VAPepsiGuy, Sep 14, 2017.

  1. Sep 14, 2017
    VAPepsiGuy

    VAPepsiGuy 1969 CJ5

    Draper, VA
    Joined:
    Dec 9, 2015
    Messages:
    43
    Have a stock '69 CJ5 with Dauntless backed by standard T86/Dana 18.

    Which crate fuel injected V6 is the most simple (fewest parts, bell housing compatible, etc.) swap?
     
  2. Sep 14, 2017
    Jeepenstein

    Jeepenstein Me like Jeep..

    North Central FL
    Joined:
    Jun 15, 2003
    Messages:
    2,132
    3.8 buick..
     
  3. Sep 14, 2017
    OrangeCJ5

    OrangeCJ5 Sponsor

    Taylorsville, UT
    Joined:
    Apr 29, 2003
    Messages:
    422
    I think most people will tell you the GM 4.3 is easiest. I know Warloch has a great FI solution for the Dauntless though. That's probably the easiest.
     
  4. Sep 14, 2017
    Focker

    Focker That's a terrible idea...What time? Staff Member

    WA
    Joined:
    Aug 18, 2014
    Messages:
    7,540
  5. Sep 14, 2017
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    8,102
  6. Sep 14, 2017
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    23,596
    What are you asking? Do you want a bolt-in solution that is already fuel injected? The Chevy V6s can easily be found with factory throttle body fuel injection, but they do not just bolt-in to replace the 225. This is about as close to a "crate motor" with fuel injection that you will find. A crate motor is a new motor, not a rebuilt. You can buy a new 4.3L V6 from Chevrolet, and all the factory pieces for fuel injection. Won't be cheap.

    If you mean a remanufactured engine (not new), the 3.8L even-fire Buick will bolt-in in place of the 225. You could fuel inject the 225, but the odd-fire makes spark control difficult and/or complicated. No such problem with the later even-fire engines. You can buy a complete bolt-on throttle body fuel injection from many places, such as Hamilton Fuel Injection, or there are universal aftermarket kits to add fuel injection. I don't think making the native EFI for the 3.8L would be so easy ... almost all of the EFI 3.8L engines are transverse mount (there were a few FWD with longitudinal mount) and it would be a project to mix a RWD Buick engine with the EFI from one of these engines.
     
  7. Sep 14, 2017
    HerkEng

    HerkEng New Member

    Boise, ID
    Joined:
    Sep 25, 2015
    Messages:
    12
    An L-67 supercharged 3800 would seem the ideal swap. Only obstacles being the throttle body location and it uses the "metric" bell housing.
     
  8. Sep 15, 2017
    VAPepsiGuy

    VAPepsiGuy 1969 CJ5

    Draper, VA
    Joined:
    Dec 9, 2015
    Messages:
    43
    Thx - I was looking for a bolt-in solution that is already fuel injected with limited modifications. Either crate or remanufactured.
     
  9. Sep 15, 2017
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    23,596
    Depends on your definition of "limited." By most peoples definition (I think), such an option does not exist.
    Look here: http://gmpowertrain.com/engines/docs/GMQD16CL760_LV1_Product PDF.pdf

    Different bell.
    May not fit under hood.
    Advanced direct injection technology.
    Mounts will need to modified, engine position will likely need to be adjusted.
    New exhaust and other connections to the chassis.
    Too much power for drivetrain.
    All new GM parts.
    Expensive.

    Just be advised - if you go with a crate engine or a bare reman long block (paying a core charge), you will be buying a lot of parts to "bolt in" that engine to your Jeep. Cost will be high. Most would start with a donor engine or donor vehicle, then run a used engine or have the donor engine refurbished. This will provide most of the little pieces you need to make the new engine work in your chassis.

    You can find 4.3L donors that are already fuel injected, but you are trading reduced complexity in running EFI for increased difficulty in installing the engine in the chassis, compared to a Buick/Jeep 3.8L.

    Another possibility is to rebuild your existing 225, and pay someone like Hamilton fuel injection to put together a bolt-on fuel only EFI for that engine. Hamilton does a lot of custom work. Supposedly Howell EFI sells a kit for the 225, again fuel only. The kit builder must be able to overcome the uneven tach signal of the 225. Megasquirt will work with an odd-fire, but that's a DYI system.
     
    Last edited: Sep 15, 2017
New Posts