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Thread: 1991 monty max 4x4. V6 to 4g swap & RHD. need 4g fit aide

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  1. #1

    Array
    Status
    Offline
    Join Date
    11-29-2015
    Posts
    466
    Location

    miami, fl
    Vehicle

    1991 Dodge D-50
    Engine

    4G64
    it's not a given that you'll get better mileage with the 4cyl over the v6. 4 works harder, revs higher.
    My very 1st swap was 4cyl to V6.
    Same car had noticeably improved economy(est ~15%) with far better driveability (due to torque increase)
    Broke the diff immediately & upgraded to bigger, taller ratio (2.92:1 iirc). Same tire diameter
    Driveability improved again with fuel economy at least 30% over the 4cyl.... and that's not even trying to granny drive it

    Also, better make sure your oem V6 gearing, suits the torque curve whatever 4cyl you choose
    Add boost to a 4cyl ?? No comparison. There goes the fuel economy 'theory'. Optimum gear ratio changes once again.


    I like your 'anything can fit' spirit

  2. #2

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    Status
    Offline
    Join Date
    03-02-2019
    Posts
    166
    Location

    Connectisuck, New England
    Vehicle

    1991 Mitsubishi L200
    Engine

    6G72
    Quote Originally Posted by dash View Post
    Add boost to a 4cyl ?? No comparison. There goes the fuel economy 'theory'.
    Not in my experience. Try keeping your foot outta the firewall and off boost ud be surprised, they still behave like a 4 cyl
    economy wise. If you cant get it to then you can't restrain yourself enough to stop the spool and blow off sounds ALL the time, or your
    tune is too rich off boost. I've NO experience with superchargers, or tiny stock turbos for that matter, just to clarify.

    Daily drive one for a year or two, they don't hafta go WOT all day, same as a street bike. They don't mind the revs, but they don't
    HAVE to scream the whole time. Unless your into that. (screamers are a good time, if they're not obnoxious screamers.... &#128521

    The mill I'm aiming to swap in has the same output as the V6 that its replacing. I'm not trying to run an OEM 8v 80's slug of
    a low compression turd here. I could give a toss about displacement and anything over 6 cyls ive very little interest in
    unless its like a corsair 20-somthing cylinder airplane engine(which I still have no true understanding of yet, due to lack of research)

    I like sub 2.8 liter 6 cyls and 4 cyls. I don't see a need for anything bigger than that in a daily driver/ recreational vehicle.
    Displacement has a replacement, boost is best.

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