Kwacka powered Krash Foot Rocket WA

Discussion in 'Jet Ski & PWC Builds' started by Odawg, Jan 26, 2015.

  1. Odawg

    Odawg Member

    Joined:
    Nov 5, 2014
    Location:
    Perth
    Happy Australia Day!

    This is my first A/M build so I will be asking A LOT of questions. I got my hull on Friday last week and have been chipping away at the build mainly checking fitment and alignment. The only item I robbed from my SXR was the engine and ebox. I have put my spare engine back in my SXR which is also fully rebuilt as I am keeping that ski for the high speed stuff. The items that I bought for this build are as follows:

    ATP Pole/Finger throttle/steering
    ATP SJ Waterbox
    Blowsion riser bars
    CF tank with carbon mounting base
    CF battery tray
    Solas 12V pump
    Hooker 11/17 prop
    CF hood prongs
    Blowsion hood hooks/hood straps
    Genuine Yami- hood latch/tank straps/strap brackets/pump shoe
    Rad dudes engine bed plate
    Rad dudes waterbox exhaust silicone pipe
    SXI pro driveshaft
    Factory Wetpipe
    Non-gen driveshaft bearing plate

    Here's a few shots so far...
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    More to follow....
     
  2. Odawg

    Odawg Member

    Joined:
    Nov 5, 2014
    Location:
    Perth
    So I got stuck into the fitment of the pump. As you can see from the pic you have to grind the utter crap out of the pump area to get the required clearance. The way I did it was to use a feeler gauge to get even clearances around the pump and then just sand the high spots until it was even. I could not see the stock kawi pump seal being used as only half of the seal would be sitting in the pump groove so would get blown out easily so I will need to seal it in with flange sealant/adhesive. I just used an old 750 pump housing for the purpose of trial fitting as the solas weighs a ton.
    [​IMG]

    As you can see I have used the stock yami pump shoe and ground it down to fit. It fits pretty good and I just have to seal it in when I do the pump. I had a number of intake grates lying around and the only one that fits near enough is a 750SX or SXI grate. The pre 08 SJ grate won't fit without out tapping the pump and grinding the mating face which sits against the shoe. The R&D 750SX grate I have fits fine except the front x2 bolt holes sit 4mm wider than the holes in the hull (SJ size)....so I will need to hit it with the dremel to elongate the holes a little. Actually I will probably buy a new 750SX Worx grate as this one looks too aggressive.
    [​IMG]

    Once the pump was fitted and sitting flush in the hull I noticed that the driveshaft angle was sloping upwards towards the front of the ski which would mean shimming the front mounts bigtime. I placed a couple of washers under the front pump mounts to angle the shaft down a bit which helped a lot. I then fitted the driveshaft bearing carrier and adjusted it until there was no binding from the prop in the pump - took me a few goes to get it right. The driveshaft is back as far as it will allow and that included a half inch rubber hose spacer in the prop. Any further aft and the machined section of the shaft would not be in the lip of the bearing carrier.
    [​IMG]

    Next I tapped the mounts. I am using an aftermarket bedplate (Rad Dudes) which is around 3mm thicker then a standard one. I had to space the rear engine mounts further out to lower the engine a little. If you used the stock bedplate you would probably be ok and only have to shim the front mounts.
    [​IMG]

    More to follow...
     
  3. Odawg

    Odawg Member

    Joined:
    Nov 5, 2014
    Location:
    Perth
    I then trial fit the waterbox. I had clearance issues where the silicone (Rad dudes) pipe was hitting hard against the top of the hull. I had to cut a fair bit off it to fit. The CF battery box and tank was trial fitted as well. I also put in the factory yami strap clips/brackets.
    [​IMG]
    [​IMG]

    [​IMG]
    I then trial fit the engine for the 50th time. OK here's where I am stuck. There is no way in the world that my Factory wetpipe is going to fit in this hull without smashing the utter crapola out of it with a sledge hammer. I have seen guys do it on predators on here (they have had diff pump setups though so engine maybe more rearward?) but it is physically possible inside my hull with the cold fusion fuel tank in place. I can see why guys have used Kart tanks. I have 3 options.

    1) I get rid of the cold fusion tank and put a kart tank in it.
    2) put a Yami Limited B pipe chamber on it and hope it doesn't hurt the power.
    3) Heat up the wetpipe with a blow torch and bash it medievil style unti it fits. Any feedback would be appreciated.

    Cheers
    Owen.
     
  4. Geoff Williams

    Geoff Williams Member

    Joined:
    Mar 2, 2014
    Location:
    Goldcoast
    i had no issues fitting the wet pipe in my preditor. mine is a Kawa fit
     
  5. Odawg

    Odawg Member

    Joined:
    Nov 5, 2014
    Location:
    Perth
    Geoff are they a wider hull?
     
  6. Geoff Williams

    Geoff Williams Member

    Joined:
    Mar 2, 2014
    Location:
    Goldcoast
    they look the same have a look on my thred Open Kawa preditor build
     
  7. Geoff Williams

    Geoff Williams Member

    Joined:
    Mar 2, 2014
    Location:
    Goldcoast
    i did cut the corner off my battery holder and move the tank over more to the right
     
  8. Geoff Williams

    Geoff Williams Member

    Joined:
    Mar 2, 2014
    Location:
    Goldcoast
  9. Odawg

    Odawg Member

    Joined:
    Nov 5, 2014
    Location:
    Perth
    OK cheers for that. I am using the Cold fusion carbon fibre fuel tank base so that is restricting the tank going any further toward the battery holder. I will remove the battery holder all together and see if I can get it to fit. The pipe is hitting against the tank and hard up against the exhaust manifold.
     
  10. Geoff Williams

    Geoff Williams Member

    Joined:
    Mar 2, 2014
    Location:
    Goldcoast
    try cutting the bace on the right hand side, my pipe does touch slightly on the tank and the hull however i have fitted hydro turf to the tank and hull to protect ,and have had no ware issues as yet
     
  11. Odawg

    Odawg Member

    Joined:
    Nov 5, 2014
    Location:
    Perth
    I have removed the carbon base and battery tray and as you can see the pipe still won't fit without denting it in a couple of places. The fuel tank is also as far to the right and forward as it can possibly go. I can't move the engine any further aft as the driveshaft will not be sitting in the bearing carrier correctly (polished section). I think I'm going to try and heat it up and dent it....unless anyone in Perth has an SJ limited chamber lying around I could try
    [​IMG]
    [​IMG]
     
  12. Geoff Williams

    Geoff Williams Member

    Joined:
    Mar 2, 2014
    Location:
    Goldcoast
    can you push back the tank ,and move the water box back as well this could give you some more room
    (the super jet pipe will not fit the manafold ) if you have to use a ball pien hammer ,
     
  13. brock

    brock Well-Known Member

    Joined:
    Mar 7, 2012
    Location:
    Perth WA
    make sure you chuck some rubber or turf under the tank matey as it doesn't take long for them to wear into the hull from all the shuffling they do when not tight as
     
  14. Odawg

    Odawg Member

    Joined:
    Nov 5, 2014
    Location:
    Perth
    Waterbox was as far back as it could go. I used a heat gun to heat up the pipe then bashed it where I had to with a hard rubber mallet. Went a bit overboard (after a few beers) but its done and it fits. Probably lost a few chamber cc's but she'll be right. I've got enough clearance now to run some turf on the side of the tank for insurance too. I also cut the corner off the battery tray as suggested and this gave me some more room too.

    Will do. The tank on the carbon base does slide around easily. I will turf the area to give it some grip.
     
  15. Odawg

    Odawg Member

    Joined:
    Nov 5, 2014
    Location:
    Perth
    Managed to finish the pump/tunnel/shoe today. Used Sikaflex 11FC to put the pump shoe in and let it cure (its nice and thick and doesn't run). I then used Loctite 5200 flange sealant to seal the pump in. The new Works WR203 fit perfectly after elongating the front two bolt holes a little. I also laid turf down the left hand side of the hull and on the fuel tank to prevent any issues with the factory wetpipe.
    [​IMG]
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  16. Geoff Williams

    Geoff Williams Member

    Joined:
    Mar 2, 2014
    Location:
    Goldcoast
    very nice & neat job . please let me know how the solas pump works , as i am debating getting the solas or the scat 145 kawa mag pump , to replace my stock pump with an R&D afterburner hub, 11/17 hooker, when i land it seems to takes to long to reload the pump with water and slight cavitation occurs witch bogs the ski down. on normal riding there is no cavitation what so ever.
     
  17. Odawg

    Odawg Member

    Joined:
    Nov 5, 2014
    Location:
    Perth
    Cheers! I've got a mate that runs the solas in his ski and it rips. He's running a 10/16 hooker. What's the bottom end like with the 11/17?
     
  18. Geoff Williams

    Geoff Williams Member

    Joined:
    Mar 2, 2014
    Location:
    Goldcoast
    very good and jumps out of its paint, my motor is ported but after landing off a wave or trick the pump is too slow to fill with water and hook up , 2 sec cavatation ,back off the power re apply all good , but you loose the momentum to go into another trick .
     
  19. Odawg

    Odawg Member

    Joined:
    Nov 5, 2014
    Location:
    Perth
    Try adjusting your afterburner pump hub to increase the length of the cone until it reduces. You may be able to find a happy medium.
     
  20. Geoff Williams

    Geoff Williams Member

    Joined:
    Mar 2, 2014
    Location:
    Goldcoast
    Cheers , however i do have a Solas trim nossel kit & i have experimented with ring sizes and other adjustments , i think its to do with pump type or size in this case ,thats why i was hopeing you could give me some feed back on your Solas pump
    when you give it a spin.
    Geoff
     

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