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Thread: My Smallport/Bigport mix and match motor swap & broken engine vid

  1. #1
    Senior Member jet111's Avatar
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    Default My Smallport/Bigport mix and match motor swap & broken engine vid


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    Alright so my Bigport decided to let go, did a big end bearing in #3..

    The sound it made: http://www.youtube.com/watch?v=kXJcwkk06d8

    The amount of play in the rod: http://www.youtube.com/watch?v=zQJ5h...response_watch

    Rather than replacing the crank and running new bearings I decided to swap the whole thing with a Smallport. The only catch is I only had half a loom, since I didnt have the cash to get it wired up properly I decided to run the Smallport on Bigport management.

    I live in a unit so I had to make do with the space I had... which actually turned out to be a good thing because there was no car parked to the right of me, it was like working in a 3 car garage. Had no complaints from neighbors.. Did the swap late on a Saturday.

    The old engine getting dismantled:


    The new motor waiting to go in:


    Old engine coming out:


    Poor old girl missing a vital part:


    The new engine in its place:


    Ok so here is how the car is running at the moment...

    Bigport parts: dizzy, harmonic balancer, water pump, injectors, loom, ECU, alternator, all the RWD water fittings and exhaust manifold.

    Smallport parts: intake manifold, spark plugs, fuel rail, leads, throttle body and a couple of electrical connectors.

    The car runs really well, much better than the Bigport did and the car is so much more manageable in traffic. I was going to convert the whole thing to Smallport but this is proving to be a good setup. Also thanks to Rthy who gave me advice about this setup.

    There was some initial confusion about whether this setup works or not so I thought I would post to say that it does

    Mark.
    Last edited by jet111; 22nd March 2009 at 06:35 PM. Reason: forgot a part

  • #2
    Senior Member sun_moon's Avatar
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    RTHY is damn good. always helps me out with stuffs.

    mad props to Leo !
    lol at white people in japan. just lol.

  • #3
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    good work.
    i ran a smallport on bigport ecu and loom too haha
    the only bigport parts i used was bigport rwd manifold, injecters and dizzy left everything else lol
    ae71 parts for sale stripping 3xae71's and a ke70

  • #4
    Senior Member sun_moon's Avatar
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    could u just swap long engines over ?
    ie bigport everything with smallport block and head ?
    it seems so, right ?
    lol at white people in japan. just lol.

  • #5
    todd
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    correct me if im wrong but the reason for using all the bigport parts on it is because the loom plugs might slightly differ between the small+big ports.
    but meh, this is always good to hear. lets hope #3 doesnt go on this puppy lol.

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    Senior Member sun_moon's Avatar
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    yep different loom
    lol at white people in japan. just lol.

  • #7
    Senior Member jet111's Avatar
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    Quote Originally Posted by sun_moon View Post
    could u just swap long engines over ?
    ie bigport everything with smallport block and head ?
    it seems so, right ?
    Not too sure about that. Most things are compatible though

  • #8
    Elite rthy's Avatar
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    oh hai, i think u can buy adjustable con rod bearings from the cusco shop!
    30kw club

  • #9
    Senior Member jet111's Avatar
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    They think of everything these days..

  • #10
    Gim Jeong Il
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    anybody else done this ?

    would like to hear experiences please.

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