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  1. #1

    engine swap 12r into 12

    did anyone ever put a gp1200r in a 98gp1200 hull , I love my hull just wanted to go a little faster and i have a gp1200r motor with everything (it a 1300 ) 1200 with 1300 cylinders on it , was just thinking about trying but could use some info or know if it will work thanks


  2. #2
    quadzilla's Avatar
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    Quote Originally Posted by kerry gross View Post
    did anyone ever put a gp1200r in a 98gp1200 hull , I love my hull just wanted to go a little faster and i have a gp1200r motor with everything (it a 1300 ) 1200 with 1300 cylinders on it , was just thinking about trying but could use some info or know if it will work thanks

    Do you mean something like this..

    Click image for larger version. 

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    That is a 1390 with the usual goodies.. VF3's, 150psi compression, 4 degree keyway etc etc.,
    - Not really sure if anyone ever worked out how much power a sorted 1390 makes.? Got to be decently north of 200??
    - Factor a stock 1300 at 165 or 170 (model dependent). Then add compression, Timing, Porting, Better intake (reeds and F/A mods),A few other tweaks..
    - That must be worth what..???


    - Unfortunately that was as far as I took it..

    Always Wondered if, The extra weigh forward and many many extra pony's would calm the crazy porpoising down on the GP hulls.??

    Although I have ZERO porpoising issues on my GP with the 65u motor..

    With a tuned 66v or 60t motor in a GP hull. I reckon you would have a closed course monster on your hands.!!
    Last edited by quadzilla; 02-25-2015 at 09:06 PM.

  3. #3
    I see no mounts up front for the motor , did you try any of the exhaust to see if that would fit thanks

  4. #4
    quadzilla's Avatar
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    Quote Originally Posted by kerry gross View Post
    I see no mounts up front for the motor , did you try any of the exhaust to see if that would fit thanks
    Hang on for 15 minutes..
    - I'll post a few more images up.. You'll be able to see what you'd be up against..

    As for the exhaust..
    The motor would need rotated through about 5-10 degrees or so to get the expansion section in without glass work. (have a mock-up image)
    The stinger section would be doable using a Riva S2 or S3 also the protec turbo tube would be a viable option

    Front mounts would need to be located on a fabricated bracket (there's a few spots to mount to)

    The E-box could be mounted on the back side of the mid-wall.

  5. #5
    quadzilla's Avatar
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    Images

    Hey there here's some more images...

    Click image for larger version. 

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    Click image for larger version. 

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    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  6. #6
    quadzilla's Avatar
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    images

    One More...

    motor mocked up, rotated about 5 degrees.-/+ 1-2
    Click image for larger version. 

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    I wonder if a set of factory triples could be stuffed in there..
    - (lol.... I just happen to have a set as well)

  7. #7
    man that looks like a rough road

  8. #8
    quadzilla's Avatar
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    Quote Originally Posted by kerry gross View Post
    man that looks like a rough road
    Yeah. that's what I figured at the time..

    particularly since my 65u motor is making about 170hp anyway(maybe more) and is "CONSIDERABLY" lighter and realistically more reliable..

    -NOW. I might give it a go again in the future. (as I have a complete low hrs 2007 GPR motor and electrics on a pallet under my bench. also tank/clocks/ecu loom etc)
    - A fuel injected 1300 GP could be a sweet thing..

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