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  1. #3851

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    if you want my opinion, all the cvrm motor is, is an aqua motor (both made by O.S.) that has had all of the casting removed for better engine flow.. my aqua motor may break the crank eventually, because it is definately turning more rpm's than it has ever dreamed of turning.. so yes, that does play a roll and puts more strain on the crank.. i have also knife edged the rod which serves 2 purposes.. less crankcase turbulance and less rotating weight... hopefully it hasn't weakend the rod enough for it too break.. but it runs d*m good though..

  2. #3852
    jcrosk's Avatar
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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    Thanks for the pictures! [sm=thumbup.gif]
    What\'\'s the worst that could happen?

  3. #3853

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    Great pics! Thanks for posting. With these engines going for only $52 at Tower, I'm going to pick another one up to mod it like this, then compare it to my stocker.

  4. #3854

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    yea.. 52 is a great deal when the piston/sleeve cost 34 bucks.. mite as well just get the complete engine.. let me know what you think once you get it done

  5. #3855

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    Question for those putting the .32 in the mv what are you doing to the strut are you running a 3/16 and if yes are you drilling out hte bearings in the strut

    Thanks

    Alex

  6. #3856

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!


    ORIGINAL: 1150ap

    Question for those putting the .32 in the mv what are you doing to the strut are you running a 3/16 and if yes are you drilling out hte bearings in the strut

    Thanks

    Alex
    The bearing is already 3/16 ...you shouldn't have to do any drilling...
    Miss Vegas w/.18TZ , JAE 12 w/.18TZ
    Shrike 10 w/Cox/RJL .15 Conquest, Shrike 40 w/7.5Df, Shrike 10 w/RB .12 serpent.

  7. #3857

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    thanks fx4l2cx

  8. #3858

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    Hello, slight topic change. Any help diagnosing this run issue would be appreciated:

    Symptom:
    Motor runs fine at high speed for about 30 to 45 seconds after the boat is launched, then dies. Starts OK, idles OK. Initially runs fast ok, then dies.

    Repeated this 3 times a row yesterday after running multiple tanks fine.

    Version one boat, stock aqua motor with heading cooling added. 30% fuel.

    Could this be a flaky glow plug?
    Miss Vegas Noob
    Bellevue, WA

  9. #3859
    Dan S's Avatar
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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    richen your HSN another 1/8 of a turn out, you may have to repeat the step one more time.
    The slight ambient temperature change (air, humidity etc) will affect the needle, the engine can run fine for 5 tanks than there is a temp change (most of the times we don't feel it but the engine does) and it can either now be too lean or too rich.

    thats the fun of nitro engines.

    Dan.
    F-41 Stryker Cat 260 Full Mod - Whiplash GV NFS 260 - FireFighter 18 - Miss Vegas CVRM 18
    Futaba FASST

  10. #3860

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    Thanks Dan. I made the following two (yeah, I know...no control) changes and it's fine now:

    - new glow plug
    - adjusted the breather on my sulivan tank. The breather tube was sagging a bit low into the fuel and I wonder if that wasn't causing fuel pressure issues. (not sure how but I fixed it anyways).

    Running good now!
    Miss Vegas Noob
    Bellevue, WA

  11. #3861

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    Prop bushing question:

    How much wear should you see on the bronze/brass prop bushing in the strut?  After running a few tanks, I'm noticing that the bushing grease is a gold tint due to metallic wear of the bushing.  Also seeing some slight scoring on the metal part of the prop shaft where it runs thru the bushing. 

    Using a waterproof synthetic bearing grease on the shaft and the bushing.  Nothing 'boat special'.  Setting the prop a few millimeters off the back of the strut as suggested in the aquacraft documentation.

    Is what I'm seeing normal or is there something I should look at?
    Miss Vegas Noob
    Bellevue, WA

  12. #3862
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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    If anything the bushing should wear and not score the prop shaft. I have wore out some bushings but that is usually after a couple gallons of fuel. Make sure that the prop shaft isn't bent, and the prop is properly balanced. This will cause the bushing to wear quicker. I may would try some rc boat specific grease too, I have always used the ProBoat stuff and it seems to work fine. I also run my drive dog a good 1/8" behind the strut bushing.
    Hope this helps.
    P-40 Brotherhood #70
    To fly is heavenly, to torque roll is devine!

  13. #3863

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    hmm. Good suggestion on checking the prop balance. That could definately hose things up. I'll see if the LHShas any boat grade prop grease.
    Miss Vegas Noob
    Bellevue, WA

  14. #3864

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    Hey all, havn't been on the RCu for a while since my MVD .32 parted ways (literally). I have a couple new rides that I have been working on. Hopefully I can get both of them up to the speeds that I had my original 32. I am in the market for a Novarossi piranha to test out also if anyone knows anyone.
    New Paint Job:


    Recovery Tug, Stock Vegas, .32, Liberty .32, and my buddies TC OS .21 VZ-M

    Liberty Vegas... sitting with a .32.. soon to be Rossi .21

  15. #3865

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    Hey bud in the picture the collet on the 32 (red one above) LOOKS like its a hair close to the stuffing tube, it may just be the picture angle
    http://www.youtube.com/user/toyotatruckin
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  16. #3866

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    ORIGINAL: toyotatruckin

    Hey bud in the picture the collet on the 32 (red one above) LOOKS like its a hair close to the stuffing tube, it may just be the picture angle
    no man.. i run it that way Actually, I was still setting up, found it easier to mount the motor then adjust the tube. Used collet to hit correct angle, epoxied the tube, moved the box back, and cut the tube perpendicular to box front for workability. Had to do some work with the Liberty tho.

  17. #3867
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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    TrEsPaSS - with your last .32 boat which prop did you end up getting the best performance with? Was it the octura x645 or did you find something better? I'm dialing in a vegas with a .21 right now but I'm gearing up to do a .32.
    Thanks

    What\'\'s the worst that could happen?

  18. #3868

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!


    ORIGINAL: jcrosk

    TrEsPaSS - with your last .32 boat which prop did you end up getting the best performance with? Was it the octura x645 or did you find something better? I'm dialing in a vegas with a .21 right now but I'm gearing up to do a .32.
    Thanks

    M445: fast and hot out of the hole
    x645: once on a plane got her going
    1945: fastest prop, had to slingshot her into the drink, high speed when planed out, if you spin your done mv becomes submarine

    Once I replace the blown engine I am going to try our some smaller diameter props 40-42 to see what she will do.

  19. #3869

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    With the .32 also try the prather 225 and 230 mine is running a soild 50.5 mph with the 225 and I have not even leaned the engine yet..

  20. #3870
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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    Thanks guys, that gives me a great starting point. I already have the two prather props and ordered the octuras. My Go engine .21 Vegas is doing 43mph now with a prather 220 but I'm still tunning the pipe. I was at 9" last weekend and I took off another 1/4" for this weekend. We'll see what she does!
    What\'\'s the worst that could happen?

  21. #3871

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    anyone have any idea what i can coat the inside of my hull with?? something i could ossibly get at lowes or something?? i ordered 2 8oz sullivan slant nose tanks today.. gonna do some changing on my boats.. would like to coat the inside of the hull with something that will look nice..

  22. #3872
    Dan S's Avatar
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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    Epoxy,

    Dan.
    F-41 Stryker Cat 260 Full Mod - Whiplash GV NFS 260 - FireFighter 18 - Miss Vegas CVRM 18
    Futaba FASST

  23. #3873

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!


    ORIGINAL: sheerider1026

    anyone have any idea what i can coat the inside of my hull with?? something i could ossibly get at lowes or something?? i ordered 2 8oz sullivan slant nose tanks today.. gonna do some changing on my boats.. would like to coat the inside of the hull with something that will look nice..
    sheer, grab some epoxy "longer drying" add some acitone to it to thin it out to make it a little more workable. Kakaptain used carbon fiber, he has some pics of the Skadoosh vegas a couple pages back, it looks good.

  24. #3874

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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    kool.. the acetone will not mess up the epoxy?? i have acetone on hand ( i am a powdercoater) .. i would like to get a cool looking grey color.. maybe i can get some grey dye somewhere.?? thanks for the tips guys... get like some 20 minute epoxy?

  25. #3875
    Dan S's Avatar
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    RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!

    sheer,

    here is a pic of mine.
    done with Epoxy thinned with just a tad of rubbing alcohol and a bit of Red Testor paint.

    Dan.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    F-41 Stryker Cat 260 Full Mod - Whiplash GV NFS 260 - FireFighter 18 - Miss Vegas CVRM 18
    Futaba FASST


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