Page 1 of 2 12 LastLast
Results 1 to 40 of 53

Thread: 8s X Maxx

  1. #1
    RC Turnbuckle Jr.
    Join Date
    Nov 2006
    Location
    USA
    Posts
    3,138

    Thumbs up 8s X Maxx

    When I put an order in for mine and seeing the motor in this truck looks like a Traxxas version of the Castle 1717 but with 1600kv, I will replace the stock esc for a Castle and run 8s on mine and see what happens !!
    that will bring my top speed with stock gearing upto 45-46mph but with so much more power

    Who is with me on this ??
    First MiniSlash
    HK6XL Revo 4s 60mph Amsoil dealer

  2. #2
    RC Racer
    Join Date
    Mar 2013
    Posts
    243
    I'm with ya. Wonder what 4s will fit

  3. #3
    RC Turnbuckle Jr.
    Join Date
    Nov 2006
    Location
    USA
    Posts
    3,138
    Quote Originally Posted by Dragonfueled1 View Post
    I'm with ya. Wonder what 4s will fit
    In this video he shows the XMaxx can fit 8400mAh 3s packs so maybe 5000mAh 4s packs could fit in the stock locations easy?
    I hope so
    First MiniSlash
    HK6XL Revo 4s 60mph Amsoil dealer

  4. #4
    RC Turnbuckle Jr. mwe-maxxowner's Avatar
    Join Date
    Feb 2004
    Location
    pageland, sc(south of monroe)
    Posts
    5,723
    I'd imagine the battery holders could be ditched for some Velcro straps and you could run more than 5000. I have a hunch if we want run times that we have become spoiled enough to expect, we'll need more than 5000 mah with this beast!
    460, straightpipes, buried throttle, nuff said :D

  5. #5
    RC Racer
    Join Date
    Mar 2013
    Posts
    243
    True, so used to 5000 packs I guess this truck enters a whole new set of rules lol

  6. #6
    RC Competitor
    Join Date
    May 2012
    Posts
    55
    Due to the lack of traction offroad, the motor will easily over rev past its rpm limit on 8s and most likely cause damage, it was fine with the XO-1 were you'd rarely max the motor out for more than a couple seconds at 100+ mph.

    Best bet is to set the throttle % down to 50% test it, then check the max rpm you are getting during normal use in the data log and slowly work your way up by increasing the throttle % till you are hitting close to max rpm just to be on the safe side.

  7. #7
    RC Turnbuckle Jr. mwe-maxxowner's Avatar
    Join Date
    Feb 2004
    Location
    pageland, sc(south of monroe)
    Posts
    5,723
    The mamaba monster x would be particularly useful here with the data logging. Or I guess the xlx. You could check every run and fine tune your limiting.
    460, straightpipes, buried throttle, nuff said :D

  8. #8
    RC Turnbuckle Jr.
    Join Date
    Nov 2006
    Location
    USA
    Posts
    3,138
    Quote Originally Posted by mwe-maxxowner View Post
    The mamaba monster x would be particularly useful here with the data logging. Or I guess the xlx. You could check every run and fine tune your limiting.
    I'm thinking the XL2 so I can check the amps going through this system on 8s
    heck even on 6s it will be fun to see how the motor is running and how many amps I'm pulling
    First MiniSlash
    HK6XL Revo 4s 60mph Amsoil dealer

  9. #9
    RC Turnbuckle Jr. Jezza's Avatar
    Join Date
    Feb 2013
    Location
    Montreal, Canada
    Posts
    5,590
    If I were to get the X Max, I will stick one of my spare XL2 or invest in a mgm system and get a motor able to take more then 8s, it will be insane but then seeing that huge machine on steroids would be fun too....
    Live life to the fullest

  10. #10
    RC Turnbuckle Jr.
    Join Date
    Nov 2006
    Location
    USA
    Posts
    3,138
    Quote Originally Posted by John McClane View Post
    Due to the lack of traction offroad, the motor will easily over rev past its rpm limit on 8s and most likely cause damage, it was fine with the XO-1 were you'd rarely max the motor out for more than a couple seconds at 100+ mph.

    Best bet is to set the throttle % down to 50% test it, then check the max rpm you are getting during normal use in the data log and slowly work your way up by increasing the throttle % till you are hitting close to max rpm just to be on the safe side.
    This is a new motor from Traxxas and just might be able to handle 8s for sure as the max rpms are not listed on this motor yet
    I will find out
    First MiniSlash
    HK6XL Revo 4s 60mph Amsoil dealer

  11. #11
    RC Qualifier
    Join Date
    Apr 2012
    Posts
    475
    But some of us like breaking things......

  12. #12
    RC Racer
    Join Date
    Apr 2015
    Posts
    242
    Quote Originally Posted by SHIFTT IX MR View Post
    But some of us like breaking things......
    You have just made my day. Good job sir
    Hi Ho Silver Away

  13. #13
    RC Qualifier
    Join Date
    Apr 2009
    Location
    Codova, TN
    Posts
    868
    This exactly what I was thinking after I found out it was 6S
    MMP-NEU 1112 1.5D 4S MERBE
    BEAST MODE [ON] OFF

  14. #14
    RC Turnbuckle Jr. ReglarGuy's Avatar
    Join Date
    Feb 2012
    Location
    Eastern Shore, Maryland
    Posts
    4,082
    Looking at how the XMaxx is modularly setup, there isn't a lot of real estate for mods. I think we're going to find it very difficult to use other setups unless the new setup parts are very, very, close to the factory parts' dimensions.
    The ReglarGuy is kid tested and father approved.

  15. #15
    RC Champion NFS's Avatar
    Join Date
    Aug 2013
    Posts
    2,097
    Quote Originally Posted by ReglarGuy View Post
    Looking at how the XMaxx is modularly setup, there isn't a lot of real estate for mods. I think we're going to find it very difficult to use other setups unless the new setup parts are very, very, close to the factory parts' dimensions.
    Everything is possible, I moded a pede 4x4 and installed a castle 2200kv with a mamba monster, did the same setup on a slash 4x4, 1/10 electronics on the mini erevo, castle 2200 on a rustler, 1717 motor on erevo and emaxx.
    The modular design is great both the pede and the slash 4x4 are modular too that's nothing new to traxxas and people has done crazy mods to overkill their trucks, I don't think this will be the exception.
    I would like to see a 2028 motor with a xl2 on 8s on this beast.

  16. #16
    RC Competitor
    Join Date
    Mar 2009
    Location
    gilroy, ca.
    Posts
    76
    Quote Originally Posted by NFS View Post
    Everything is possible, I moded a pede 4x4 and installed a castle 2200kv with a mamba monster, did the same setup on a slash 4x4, 1/10 electronics on the mini erevo, castle 2200 on a rustler, 1717 motor on erevo and emaxx.
    The modular design is great both the pede and the slash 4x4 are modular too that's nothing new to traxxas and people has done crazy mods to overkill their trucks, I don't think this will be the exception.
    I would like to see a 2028 motor with a xl2 on 8s on this beast.
    there would have to be a huge gearing change to run that setup. stock electronics on 6s is approx. 35,000 rpm, the 2028 on 8s approx 23,700rpm. I imagine getting the motor to fit with the right spur and pinion might not be worth the cost and effort. But I'd like to see it too.

  17. #17
    RC Qualifier NBViper's Avatar
    Join Date
    Feb 2013
    Location
    MA
    Posts
    386
    Who else besides Castle makes an 8S capable ESC?

  18. #18
    RC Turnbuckle Jr. ReglarGuy's Avatar
    Join Date
    Feb 2012
    Location
    Eastern Shore, Maryland
    Posts
    4,082
    Everything is possible.
    I didn't say impossible. I just said very difficult due to the lack of real estate.

    I would like to see a 2028 motor with a xl2 on 8s on this beast.
    I would like to see that to. The MM2 is rated for either a 13/15 pounds truck...I can't remember for sure. This Xmaxx is 20ish pounds. I gotta think things are being pushed a little bit close to the line...thus, I'll probably wait a little while before I really think seriously about buying one.
    The ReglarGuy is kid tested and father approved.

  19. #19
    RC Competitor
    Join Date
    Mar 2014
    Location
    Wellsville, NY
    Posts
    81
    Quote Originally Posted by NBViper View Post
    Who else besides Castle makes an 8S capable ESC?
    Hobbywing makes the EZRUN Max 5 that is 8s compatable.

  20. #20
    RC Qualifier NBViper's Avatar
    Join Date
    Feb 2013
    Location
    MA
    Posts
    386
    Thanks. I now have a mission to make an 8S system fit and push the boundaries of the XMaxx. Should be fun!
    -=/ X-Maxx - 8S XLX/2028 \=-

  21. #21
    RC Qualifier
    Join Date
    Mar 2012
    Location
    Charlotte, NC
    Posts
    605
    Just remember we need videos

  22. #22
    RC Champion
    Join Date
    Nov 2012
    Location
    Nashville, TN
    Posts
    2,082
    I have a feeling that on 8s, those stock tires are going to explode like the e-revo's do on 6s.

  23. #23
    RC Qualifier
    Join Date
    Feb 2015
    Location
    nc, usa, earth
    Posts
    689
    I just blew apart 2 tires on my savage today ouch the bad part is they were 2 different sets....

  24. #24
    RC Qualifier NBViper's Avatar
    Join Date
    Feb 2013
    Location
    MA
    Posts
    386
    Never had a problem with 6S on my Revo, then again not much of it was stock (including LST2 diffs). Half the fun for me is finding the next weak link.

    I've got an XL2 waiting... Need to find the right motor and then how to fit it! Probably will have to fabricate some custom parts.

  25. #25
    RC Turnbuckle Jr. ReglarGuy's Avatar
    Join Date
    Feb 2012
    Location
    Eastern Shore, Maryland
    Posts
    4,082
    I've got an XL2 waiting... Need to find the right motor and then how to fit it! Probably will have to fabricate some custom parts.
    Sounds like you're on the right track. What I'd do is look at an Xmaxx in person first, see if I could get some workable ideas together, then put my money down if I thought the mods I wanted to do were do-able. That way I wouldn't have any costly bad surprises.
    The ReglarGuy is kid tested and father approved.

  26. #26
    RC Qualifier NBViper's Avatar
    Join Date
    Feb 2013
    Location
    MA
    Posts
    386
    I'll run it at least once or twice stock before I rip it apart. I've been pouring over the exploded views and drawings and have some ideas. I've got a 3D printer available to test out any part designs.

    Bigger question is will the stock motor withstand 55k RPM. Probably not.
    -=/ X-Maxx - 8S XLX/2028 \=-

  27. #27
    RC Qualifier
    Join Date
    Mar 2011
    Posts
    518
    I would like to know what 4s battery packs will fit the battery tray

  28. #28
    RC Qualifier NBViper's Avatar
    Join Date
    Feb 2013
    Location
    MA
    Posts
    386
    Quote Originally Posted by momort View Post
    I would like to know what 4s battery packs will fit the battery tray
    Most likely only a few lower capacity ones will fit. Higher capacity will require modification.

  29. #29
    RC Qualifier NBViper's Avatar
    Join Date
    Feb 2013
    Location
    MA
    Posts
    386
    Just having a bit of fun while I wait (somewhat) patiently...

    It appears that if you include the cooling fins on the current Traxxas motor (which their spec sheet does not), you get approximately the same width (2.2") as the Castle 2028 motor. Length is obviously the bigger issue.


    Disclaimer: This is all an approximation based on images Traxxas publicly provided. Have to wait to see it in person to verify sizing and fit.

  30. #30
    RC Competitor
    Join Date
    May 2012
    Posts
    55
    Are there any pinion gears for the 2028's 8mm shaft that can be used in the xmaxx?

  31. #31
    RC Qualifier NBViper's Avatar
    Join Date
    Feb 2013
    Location
    MA
    Posts
    386

    8s X Maxx

    Quote Originally Posted by John McClane View Post
    Are there any pinion gears for the 2028's 8mm shaft that can be used in the xmaxx?
    Yes, multiple vendors make M1 8mm pinions.
    -=/ X-Maxx - 8S XLX/2028 \=-

  32. #32
    RC Turnbuckle Jr. ReglarGuy's Avatar
    Join Date
    Feb 2012
    Location
    Eastern Shore, Maryland
    Posts
    4,082
    I didn't see any cooling fins on any of the Xmaxx's motor pictures. I always see that Traxxas motors are smooth, and have no cooling fins. Any-who I still think things are really going to be tight with the new Xmaxx.

    P.S. Looks like from the picture above that Traxxas added a heat sink to their motor. That would be good news for putting in a Castle 1717, XO-1 motor. I still don't think there will me enough real estate for a Castle XL2 ESC...who knows for sure right now, though...we'll see.
    Last edited by ReglarGuy; 11-17-2015 at 04:37 PM.
    The ReglarGuy is kid tested and father approved.

  33. #33
    RC Qualifier NBViper's Avatar
    Join Date
    Feb 2013
    Location
    MA
    Posts
    386
    I think it certainly needs the heatsink, since it's buried down low in the chassis. Doesn't appear that much airflow would get to it.

    P.S. I will make it all fit or have FUN trying!!!

  34. #34
    RC Qualifier NBViper's Avatar
    Join Date
    Feb 2013
    Location
    MA
    Posts
    386
    So, I'm having second thoughts on the Castle 2028 800kv motor. I've been doing some pinion/spur calculations and have a concern that with the already tight fitting, I'm not going to have enough side to side space to have many gearing options.

    Going from 1600kv to 800kv, cuts the output speed by 50% and going from 6S to 8S gives 33% increase in speed. Overall this cut speed to 0.66%

    Assuming the motors are the same width...
    Stock gearing (15/54) goes from ~35MPH to ~24MPH (and I'm sure this equals instant backward flips)
    Tallest gearing (26/46) goes from ~71MPH to ~47MPH (and probably still have ridiculous torque)

    26/46 gearing appears to push the motor the furthest away according to the motor mount. So, if I were going for pure speed (which I am not), I doubt I could fit a larger Pinion gear and the Spur gear doesn't appear to have much more room to shrink.


    So looking at other options for motors that can take 8S voltages (the 2028 can take up to 12S!), I see Leopard and SkyRC. They both have options in the 900 to 1000kv range. Anyone with experience with these brands?

  35. #35
    RC Qualifier NBViper's Avatar
    Join Date
    Feb 2013
    Location
    MA
    Posts
    386
    OK, I've made the decision to stick with Castle on the motor as well. The "bargain" XL2 I received was damaged (blown caps) so I've decided to go for the new XL X.
    I received confirmation from Castle they are shipping them on the 1st week of December, just in time.

  36. #36
    RC Champion
    Join Date
    Dec 2008
    Location
    San Diego, CA
    Posts
    1,860
    Quote Originally Posted by ReglarGuy View Post
    I didn't see any cooling fins on any of the Xmaxx's motor pictures. I always see that Traxxas motors are smooth, and have no cooling fins. Any-who I still think things are really going to be tight with the new Xmaxx.

    P.S. Looks like from the picture above that Traxxas added a heat sink to their motor. That would be good news for putting in a Castle 1717, XO-1 motor. I still don't think there will me enough real estate for a Castle XL2 ESC...who knows for sure right now, though...we'll see.
    Isn't the motor already the same size and KV as the 1717? Seems like all you would do is lose out on the water proofing by swapping it with a 1717.

  37. #37
    RC Competitor
    Join Date
    May 2012
    Posts
    55
    Omg why dont they list the 26 pinion in the part's list I only noticed that now (maybe that means there will be a more powerful version ).

    What would the top speed be with 26/46 at 8s stock motor?

    On the XO-1 the spur gear goes straight to the drive shaft but on the x-maxx the gearing will go from lets say 26/46 to 20/51(Fixed ratio) to the drive shaft will that have any affect on top speed.
    Last edited by John McClane; 11-19-2015 at 02:11 PM.

  38. #38
    RC Qualifier NBViper's Avatar
    Join Date
    Feb 2013
    Location
    MA
    Posts
    386
    If you could push 8S through the stock motor without blowing it to bits... theoretically (no load, perfect batteries, no resistance, ideal conditions,etc, etc, etc....) you are talking ~94MPH... But that will never happen with the stock motor.

  39. #39
    RC Champion
    Join Date
    Dec 2008
    Location
    San Diego, CA
    Posts
    1,860
    Quote Originally Posted by NBViper View Post
    If you could push 8S through the stock motor without blowing it to bits... theoretically (no load, perfect batteries, no resistance, ideal conditions,etc, etc, etc....) you are talking ~94MPH... But that will never happen with the stock motor.
    In addition to not happening with the stock motor...

    That won't happen with the stock suspension
    That won't happen with the stock tires
    That won't happen with the stock aero characteristics

    In other words, it's going to take a lot to get a truck like this going that fast, simply throwing more power at it isn't going to get you there.

  40. #40
    RC Turnbuckle Jr. Jezza's Avatar
    Join Date
    Feb 2013
    Location
    Montreal, Canada
    Posts
    5,590
    Quote Originally Posted by NBViper View Post
    If you could push 8S through the stock motor without blowing it to bits... theoretically (no load, perfect batteries, no resistance, ideal conditions,etc, etc, etc....) you are talking ~94MPH... But that will never happen with the stock motor.
    I have the xl2 but have a look at mgm too...some crazy capable esc there....
    Live life to the fullest

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •