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Thread: 4s is doable

  1. #1
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    4s is doable

    Since the speculation on whether or not 4s would be doable was rampant, I decided to ask Traxxas directly.

    Here is there response:

    Hello,

    4s lipo will work. The new ESC will handle up to 4S (2S lipos x2 in series) or 12 Nimh cell (2 6cell pack in series)



    Best regards,
    TRAXXAS Customer Service


    Hopefully this sets any confusion straight.

  2. #2
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    Then why the heck say 3s is the max when it's not. Why not say 4s can be run under these conditions?

    4s opens up a whole new can of worms.
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  3. #3
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    Quote Originally Posted by jcm-maxx
    Since the speculation on whether or not 4s would be doable was rampant, I decided to ask Traxxas directly.

    Here is there response:

    Hello,

    4s lipo will work. The new ESC will handle up to 4S (2S lipos x2 in series) or 12 Nimh cell (2 6cell pack in series)



    Best regards,
    TRAXXAS Customer Service


    Hopefully this sets any confusion straight.




    no way?!?!? can you screen cap the proof? its not that i dont trust you its just had to belive! that would be awesome!

  4. #4
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    You mean actually post the email? I took out the guy's name just and mine, but that is it...

  5. #5
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    That thing is going to be silly fast on 4S lipo. I havent been this excited to get an RC in some time. I thought summit fever was bad. I guess it makes it worse since I already have some mini sized lipos ready for a home.
    Slash PE, Slash 2wd, E-revo BE soon

  6. #6
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    This was my original message.. didn't get it all answered, but doesn't matter.

    At 02:42 PM 4/14/2009 -0700, you wrote:
    > Hello,
    >
    > I had a few questions about the new 1/16 e-revo that I was hoping you could answer. There seems to be a lot of speculation about whether or not a 4s lipo configuration is doable with this mini. It would put the voltage to about 14.8v, only 3% more than 12 cell nimh configuration. Would this work?
    >
    > Also, exactly what configuration is the 50+mph one? 3s lipo? 12 cell nimh? Both? Thanks a lot for your time!

  7. #7
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    wow thats awsome. bye bye 75 bucks on mini lipos.
    i bet my Quad could out RIP your Quad!!

  8. #8
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    if this is true I'm so getting 2 of theses battarys....

    PolyRC 1200mah 4s 30C Lipo

    Dimensions
    104 x 30 x 24mm
    4.09 x 1.18 x 0.94inWeight
    142 gms.
    5.01 oz. Price
    $68.05 Factory C Rate
    30C - (36 amps)
    continuousBurst C Rate
    50C - (60 amps)
    under 10 secondsIdeal C Rate
    25C - (30 amps

    its 3 mm to long and 4 mm to tall but I can pull out the drimal. wire it in parall and have 2400ma on 4s!
    Last edited by josh7owens; 04-15-2009 at 11:00 PM.

  9. #9
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    These VXL minis on 4s would be awesome!

  10. #10
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    Quote Originally Posted by FyrFytr998
    Then why the heck say 3s is the max when it's not. Why not say 4s can be run under these conditions?
    Because the speed controller doesn't have a built-in cut off for 4S. Claiming a max of 3S for this reason is accurate.

    You would need to turn off the speed controllers LVC and buy an external one and it will be fine. (Be careful with heat.)

  11. #11
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    Quote Originally Posted by Slasher
    Because the speed controller doesn't have a built-in cut off for 4S. Claiming a max of 3S for this reason is accurate.

    You would need to turn off the speed controllers LVC and buy an external one and it will be fine. (Be careful with heat.)

    linkto a external LVC that will work?

  12. #12
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    I don't have a link. I don't use an external cutoff. Just browse the regular major RC stores and you'll find them. They're not uncommon.

  13. #13
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    That would have been good to know before i ordered the 3s packs :| Maby i can cancel the order.

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    Novak smartstop 2s Put it on one battery. This is what i run in my E-Maxx with 4s

    Or 4s for both batts
    RC Addict #341777

  15. #15
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    Quote Originally Posted by Freak1
    That would have been good to know before i ordered the 3s packs :| Maby i can cancel the order.
    It's listed in the specifications.

  16. #16
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    Its possible the esc will recognize the 4s lipo, it depends on if it sees voltage per cell or overall. For example the mamba max specs say it runs 3s, but i have run one at 5s for many months and the cut-off worked without fail. Why? because it recognizes the per cell voltage not total voltage. MGM's only recognize total voltage, That's why you have to program the voltage cut-off every time you change battery setups. More than likely it will have a max that it can operate and will not work above that.

  17. #17
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    Quote Originally Posted by jcm-maxx
    It would put the voltage to about 14.8v, only 3% more than 12 cell nimh configuration.
    A 4s lipo fully charged is 16.8v, which is 14% higher.

    Does this make any difference??

  18. #18
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    Quote Originally Posted by kamaka71
    A 4s lipo fully charged is 16.8v, which is 14% higher.

    Does this make any difference??

    No.
    fully charged NiMH are up there to!

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    I just got off the phone with traxxas and he said they just had a meeting about this with the engineers. The engineers said that the esc is the limitaion and that it will just start blinking red and green due to a overload. some one else please call. hopfully the guy i talked to is wrong.

  20. #20
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    The new mini brushless esc will take 4s

  21. #21
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    Yeah it would be very nice to know if it works or not its not very fun to guess all the time.

  22. #22
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    Quote Originally Posted by Freak1
    Yeah it would be very nice to know if it works or not its not very fun to guess all the time.

    It's not a quess...

  23. #23
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    it kind of is. i called traxxas and they said that it wont work because it will put the esc in a over power mode. call and ask them

    1-888-872-9927

  24. #24
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    Quote Originally Posted by josh7owens
    it kind of is. i called traxxas and they said that it wont work because it will put the esc in a over power mode. call and ask them

    1-888-872-9927

    No it will not
    and this is not a guess..
    I called and talked to a tech..
    14.4v vs 14.8v

  25. #25
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    Quote Originally Posted by filmmaker

    No it will not
    and this is not a guess..
    I called and talked to a tech..
    14.4v vs 14.8v
    thank you. i did the same exact thing and thats what they told me. somthing about it will start beeping red and green because of a voltage overload.

  26. #26
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    Quote Originally Posted by josh7owens
    thank you. i did the same exact thing and thats what they told me. somthing about it will start beeping red and green because of a voltage overload.
    I know the full size VXL will do that, it is rated to 9cell NiMh same as 3s..
    The mini is rated to 12cell NiMh and thats almost exactly the same as 4s..
    Either way, I'm trying it..

  27. #27
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    Quote Originally Posted by filmmaker
    I know the full size VXL will do that, it is rated to 9cell NiMh same as 3s..
    The mini is rated to 12cell NiMh and thats almost exactly the same as 4s..
    Either way, I'm trying it..

    ok you try it if it works ill order battarys.

    i dont want to spend 150 on 2 battarys i cant even use.

  28. #28
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    Quote Originally Posted by josh7owens
    ok you try it if it works ill order battarys.

    i dont want to spend 150 on 2 battarys i cant even use.

    where you getting 150 from??? two 20c 1600mah 2s ***** batteries will set you back around 30 bucks
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  29. #29
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    Quote Originally Posted by josh7owens
    ok you try it if it works ill order battarys.

    i dont want to spend 150 on 2 battarys i cant even use.

    150 bucks!
    dang what size are they?

  30. #30
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    Quote Originally Posted by filmmaker
    150 bucks!
    dang what size are they?
    if we could run 4s i was going to get 2 of theses

    PolyRC 1200mah 4s 30C Lipo $70 each plus shipping

  31. #31
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    Quote Originally Posted by josh7owens
    if we could run 4s i was going to get 2 of theses

    PolyRC 1200mah 4s 30C Lipo $70 each plus shipping
    Dang!
    What about some 2200mah 15c 2s in series? 20-25 bucks each
    much cheaper and about the same run time..
    not as many cont. amps as the Poly, but should be more than enough..

  32. #32
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    Just make sure to send in $45 with the esc when you try 4s. You can call Traxxas at any time and they will tell you it will not handle 4s.

  33. #33
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    Just for the record, I am not advocating 4s systems, just reporting what traxxas told me in an e-mail. If you don't want to believe it or have heard different stories elsewhere, that's totally fine.

    As for me, I will be plenty fine using 3s in parallel. 3200mah +40mph is plenty for me.

  34. #34
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    Well, now I feel dumb.. traxxas just sent me another message.

    Hello Jonathan,

    I am sorry! I was incorrect with my info. It can handle up to 3s. It can run two 2s packs in parallel, not series. It will go 50+ on 3s. It will be a little faster running two NiMh packs.

    Regards,
    Steve


    I guess he probably got a lot of curious calls/emails. I am still thinking 4s could work, but it's really up to whoever wants to be the first to try it.

  35. #35
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    Quote Originally Posted by majestic
    Just make sure to send in $45 with the esc when you try 4s. You can call Traxxas at any time and they will tell you it will not handle 4s.

    I've talked with there techs twice and both times they said yes..
    but no LVC with the 4s set up!

  36. #36
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    Quote Originally Posted by jcm-maxx
    Well, now I feel dumb.. traxxas just sent me another message.

    Hello Jonathan,

    I am sorry! I was incorrect with my info. It can handle up to 3s. It can run two 2s packs in parallel, not series. It will go 50+ on 3s. It will be a little faster running two NiMh packs.

    Regards,
    Steve


    I guess he probably got a lot of curious calls/emails. I am still thinking 4s could work, but it's really up to whoever wants to be the first to try it.
    Kinda strange?
    50+ on 3s, actually it's 50+ on 12cell Nimh, it's only about 40 on 3s.

    That is stated on all videos and specs through Traxxas!
    Last edited by filmmaker; 04-17-2009 at 03:38 PM.

  37. #37
    Registered User majestic's Avatar
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    Well send in the $45, since I work in the repair lab at Traxxas I couldn't possibly know what I'm talking about.
    Check out page 17 of the owners manual when you get one or online.
    Last edited by majestic; 04-17-2009 at 06:35 PM.

  38. #38
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    Majestic is correct with his comment. It will not handle 4s power as per the engineering department here at Traxxas. I feel if anyone would know the limitations of the esc it would be them. And at any point you feel like testing this known fact....please have $45 dollars and a box handy to send it back in and we will gladly repair it for you. This is a quote straight from the owners manual "Alternating; Blinks Red then Green: If the motor has no power, the VXL-3m has entered Over Voltage Protection. If a battery with too high voltage is used, the VXL-3m will go into a failsafe mode. Warning: If input voltage exceeds approximately 20 volts, the ESC may be damaged. Maximum peak input voltage limits are 12.6V in LiPo Mode (see page 17) and 18V in NiMH Mode." If you would like to read this for yourself or feel that you have other questions please feel free to check out the owners manual. http://www.traxxas.com/PDF-Library/7008_7108_manual.pdf
    Ferb

  39. #39
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    so what if you pull the trick lick the mm and get a cc bec and whatnot I am not impling it should but maybe it could if a traxxas rep could either tell me they tried this sorta thing or otherwise I would appreciate it
    My car learned how to fly then forgot the landing

  40. #40
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    Quote Originally Posted by filmmaker
    Kinda strange?
    50+ on 3s, actually it's 50+ on 12cell Nimh, it's only about 40 on 3s.

    That is stated on all videos and specs through Traxxas!

    Thats a given on that gearing. Don't forget lipo's can take the amp draw and you can increase your gearing and top end very easily if all you want to do is a few speed passes (notice the chart on usable gearing as well). Keep in mind it's still a 380 motor even if it's "neu quality" it will have a hard time pushing those speeds other than a few asphalt speed runs. As far as bashing and racing goes 38-40mph is going to be the top for reliable use most likely. If you want more think about upgrading to a 1/10 velineon system.

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