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Thread: Easy Plymouth Arrow Engine Swaps?

  1. #1
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    Easy Plymouth Arrow Engine Swaps?

    Hi everyone. New to the forum, long time mitsu owner, currently own two Galant VR4's and two montero's


    Picking up a 1978 Plymouth Arrow from it's original owner. Maiden voyage will be 2500 miles.

    Which got me to thinking, the engine might be sound enough to make the slow ride home, but I'll have all my tools with me and some time on me hands, probably access to a few garages along the way (friends)...

    What's the easiest EFI engine swap for more power, while retaining the chrysler automatic 904?

    I'm looking for a situation like this:
    hit a junkyard, grab a newer 1.6/2.0 liter DOHC, wiring and ECU, slap engine into car, tidy up wiring, throw an inline fuel injection fuel pump in it and drive an EFI 70's coupe home.

  2. #2
    Administrator JNC's Avatar
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    Re: Easy Plymouth Arrow Engine Swaps?

    -Matt

  3. #3
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    Re: Easy Plymouth Arrow Engine Swaps?

    Had to register, waiting for approval... Thanks.

  4. #4
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    Re: Easy Plymouth Arrow Engine Swaps?

    Oh look you joined up here too...good :mrgreen:. Drive it home first then pull it apart!

    Matt, I stole my Coupe from under his nose and now he's going to hunt me down for my wagon! :lol:

  5. #5
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    Re: Easy Plymouth Arrow Engine Swaps?

    :twisted: I'll do it!

  6. #6
    Administrator JNC's Avatar
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    Re: Easy Plymouth Arrow Engine Swaps?

    hey we need all the aggressive old school mitsu collectors we can get :lol:
    -Matt

  7. #7
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    Re: Easy Plymouth Arrow Engine Swaps?

    Quote Originally Posted by matt
    Not real sure, but I think the RWD 2.4 Sirius only is wide, whether man or auto? May take a little more work, but I think FWD motors are all narrow? (Damn Mitsu and there wide/narrow blocks :x ) Another solution may be to swap in a whole engine/auto trans from a MM and get the benefit of a OD trans, although a 16v 4G64 would be a nice swap, IMO. I am pleased with the performance and relative ease (and low cost!) of my swap. By the way, where are you picking the car up from?

    Mark

  8. #8
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    Re: Easy Plymouth Arrow Engine Swaps?

    May I also take this oportunity to invite you to sigma-galant.com
    It's an Australian based community for 70's mitsu and has plenty of info on swaps.

    The 2.6L Astron (4G54) is by far the easiest and most common swap out here as that engine I plentiful in both Carb and EFI versions.

    The Sirius (4G6*) series of motors is also a fairly easy swap, but not as simple as the astron. I run an N/A 2L 4G63 DOHC in my Galant with the original box behind it. There were a few headaches in re-orientating the motor to RWD but nothing too tricky.
    The astron is still way easier, it'll all come down to what's more available to you.

    Keep us posted with your progress anyway. It'll be good to see another classic mitsu get some attention.

  9. #9
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    Re: Easy Plymouth Arrow Engine Swaps?

    Quote Originally Posted by Datsunrides
    Quote Originally Posted by matt
    Not real sure, but I think the RWD 2.4 Sirius only is wide, whether man or auto? May take a little more work, but I think FWD motors are all narrow? (Damn Mitsu and there wide/narrow blocks :x ) Another solution may be to swap in a whole engine/auto trans from a MM and get the benefit of a OD trans, although a 16v 4G64 would be a nice swap, IMO. I am pleased with the performance and relative ease (and low cost!) of my swap. By the way, where are you picking the car up from?

    Mark
    SF Bay area :wink:, He's going to fly out and check out that silver '74 wagon and a Arrow out that way, then determine which one he wants to scoop up 8).


    pssssh...He just snagged a '76 Colt Galant Sedan too.

    I sent him all the links for here, SG, and ClassicColt over on the galantvr4.org board.

  10. #10
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    Re: Easy Plymouth Arrow Engine Swaps?

    That wagon is about 45 minutes from me, and if it's that brownish Arrow listed in Hollister, that is like 10 minutes from me. The wagon supposedly runs and the Arrow has been sitting for a while so may take a little work to get running good enough to drive back. I'd say the wagon seems the better deal, but I'm a little partial to wagons anyways.

    Mark

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