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  1. #1
    RC Turnbuckle Jr. ReglarGuy's Avatar
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    Output Drive Mod (Part 1)

    A while back, I had my 7 year old stock (except for the water cooled heat sinks I made) Spartan’s ESC take a poop on me. I decided, for the money, I’d give that Seaking 180 and Leopard 4082 motor a try. Over the years I’ve read where many of you have gone to it.



    When I installed my new ESC and motor into my Spartan, I did a post showing how I installed it along with some ideas on how to make the future maintenance of it easier.

    https://forums.traxxas.com/showthrea...-s-Vaccaio-Mod

    Shortly after installing my Spartan’s new electronics, I found it necessary to also upgrade its’ flex cable, because for some reason my stock flex cable couldn’t handle the new electronics’ torque increase.
    When my original stock flex cable broke, I wasn’t all that concerned due to it being 7 years old, but when I broke a brand new stock one; I knew I needed to do something different.

    OSE suggests and offers a new flex cable and drive when changing from the old Spartan’s stock electronics to their new upgraded power system, but I really didn’t want to use their suggested flex cable if I could get out of it. I’ll explain why in a minute.
    Basically though, The OSE upgraded dive replaces the stock .150” setup with a new beefier .180” system, and it eliminates the Teflon tube. It also, changes the Traxxas stock 5mm flex cable’s strut shaft to that of a standard 3/16.

    One of the reasons why I like my current drive better was; I didn’t like the idea of having that amount of free play in my 1/4” brass dive tube with only using a .180” flex cable. For the OSE drive to have the same fit as stock (or as my current) brass drive tube, the OSE system would need to use a 7/32 inch brass drive tube with their .180 flex cable.

    The other reason why I wanted to keep my current drive was due to cable mass. With less flex cable mass, theoretically, I should have less resistance, and thereby more responsiveness with my Spartan’s .150” flex cable drive.
    Steve (from OSE) gave me a complete upgraded final drive, and I took the advantage of having it to see how I might be able to better improve on its’ design.

    The first thing I noticed was that the OSE strut only had two small Teflon led bushings in it rather than a one piece Teflon tube going end-to-end. From the picture (below) you can see how the one end of the strut is minus an inserted bushing.


    I wouldn’t have minded this as much if the two Teflon led bushings would have been longer and located closer to the ends of the strut rather than small and located in the center. I’m sure the reason for this bushing placement was due to ensure that the 3/16” flex cable’s strut shaft would reliably come in contact with the new strut’s small two piece Teflon bushings no matter how the strut was adjusted for strut/prop gap.

    Last edited by ReglarGuy; 11-29-2018 at 02:36 PM.
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  2. #2
    RC Turnbuckle Jr. ReglarGuy's Avatar
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    (Part 2)

    I changed this buy installing a one piece 7/32” Teflon led bushing the full length of a Traxxas OEM strut. If you want (if you don’t have the means of a Teflon led bushing), you can get by with installing a 7/32” brass tube.



    The next thing I wanted to do was to find (if possible) a more reliable .150” flex cable. I went up the road to Aero-Marine for this, and talked to them about available flex cables. I eventually decided to try one of their .150” flex cables that are made from Germen components and assembled by them at their facility.
    Below are the steps I took to fit the new .150” cable to my Spartan. First I measure length, and then added one inch before cutting.



    Then I marked and cut the indent for my prop dog. I also trimmed the thread length to that of the stock cable.



    Notice the difference in the solder joint, and how the solder flow is extended to the cable. Also, the Aero-Marine cable is way more flexible than the stock one.



    Compare the fit of my modified strut to its’ .150” cable and its’ 3/16” (Top) to that of the stock strut.





    Another advantage of having the stock bushing bored to accept a 7/32” bushing rather than removing it (as OSE did) is you can solder a 7/32” brass tube to nicely replace the stock stuffing tube. The advantage here is no grease spooge all over the back of your boat’s hull, and longer lasting lubrication for longer run times.



    To fully do this lubrication and Teflon tube replacement mod take a look at the post I wrote a little while back.

    https://forums.traxxas.com/showthrea...er-Replacement

    Finally, after trimming off some of the extra one inch of cable that I added before (when cutting my cable in a previous step), I solder my end using the two crucibles I made.

    https://forums.traxxas.com/showthrea...ring-Made-Easy

    Here’s the finished project, and so far (with many more runs than my second stock .150” flex cable) everything seems to be working and running very well. Now with my OSE electronics power upgrade, I can still have all the advantages of using .150” flex cable rather than losing them due to the usage of a .180” flex cable.

    The ReglarGuy is kid tested and father approved.

  3. #3
    RC Enthusiast
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    Great info and pics to help as always. Im still gonna have kabillion questions when I get started on the Spartan but am learning a lot just reading . I now know about enough to be dangerous...LOL. I think I read on one of your post that your ran 50c lipos on you stock set up and it was ok. What would happen if they were 30c instead of 50c? To get to my point quick...I have 2 2wd slashs a Blackjack 24 and a TRX 4. I really dont want a bunch of different batteries if I can get around it.

  4. #4
    RC Turnbuckle Jr. ReglarGuy's Avatar
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    I'm still gonna have kabillion questions when I get started on the Spartan but am learning a lot just reading.
    A Kabillion? That's a lot of questions. (lol)
    The ReglarGuy is kid tested and father approved.

  5. #5
    RC Turnbuckle Jr. ReglarGuy's Avatar
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    What would happen if they were 30c instead of 50c? To get to my point quick...I have 2 2wd slashs a Blackjack 24 and a TRX 4. I really don't want a bunch of different batteries if I can get around it.
    When I first got my Spartan and had a stock setup, I used Traxxas 11.1, 5000mah 25c batteries and they ran well. As time progressed I went to Traxxas 6400mah batteries, and they ran even better. I now use Vant 11.1, 6600mah, 70c batteries, and they have been the best so far.

    I would use what you have. Then when your batteries are spent I would go to a beefier battery. I have several vehicles too, and what I do is run 5000mah 70c in them, and 6400mah in my boats. Boats are a lot harder on batteries than land vehicles, so eventually you'll want to run different batteries in them like I do.
    The ReglarGuy is kid tested and father approved.

  6. #6
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    Traxxas spartan upgrade driveshaft...
    I now that you are specialist with spartan.
    I wanna upgrade driveshaft... So i need your help... Size of the copperpipe, liner and driveshaft lenght and all measurements...
    Lakes are now on ice but sea is still open... So i think oem driveshaft goes bad in the sea and then i make upgrade... Thx allready.

    Speeder


    Lähetetty minun COL-L29 laitteesta Tapatalkilla

  7. #7
    RC Turnbuckle Jr. ReglarGuy's Avatar
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    Quote Originally Posted by Speeder View Post
    I now that you are a specialist with the Spartan.
    Me, a Spartan specialist? Dude, it's all I can do to be a regular guy let alone a Spartan Specialist. A Spartan Specialist is one with the universe. He's a guy that is loved and cherished by Hebrews and Gentiles all over the world (no matter what their age or shoe size). No my friend, I'm not a Spartan Specialist...just a ReglarGuy.

    If you read this post and the other posts I linked to this post, you will get all but one thing you need to know, and that is the gap between where your two 3/16" stuffing tubes meet. I made my gap 1/8". Depending on how you want to adjust your boat's strut will determine all your lengths.

    All your tube diameters are in the above web page links. One last thing to remember (when determining your lengths) you can always cut shorter, but you can't add on. The nice thing about doing this mod is, though, non of the materials are expensive, so if you make a mistake...it's no big deal.
    Last edited by ReglarGuy; 12-03-2018 at 06:07 PM.
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  8. #8
    RC Enthusiast
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    Traxxas spartan

    U now i mean you know a lot of the boat specially Spartan.... Just ask becauce i dont wanna make mistake..

    Lähetetty minun COL-L29 laitteesta Tapatalkilla

  9. #9
    RC Enthusiast
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    And you are usually be here

    Lähetetty minun COL-L29 laitteesta Tapatalkilla

  10. #10
    RC Turnbuckle Jr. ReglarGuy's Avatar
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    Quote Originally Posted by Speeder View Post
    Traxxas spartan

    U now i mean you know a lot of the boat specially Spartan.... Just ask becauce i dont wanna make mistake..

    Lähetetty minun COL-L29 laitteesta Tapatalkilla
    I know, but I have to tease you anyway...it's my job.
    The ReglarGuy is kid tested and father approved.

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