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  1. #1
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    3200kv vs 4000kv?

    i believe i posted this in wrong section. anyone have any insight on differences ill experience between these 2 motors. i am looking at HW Max10 sct 3200kv and 4000kv. i only use 2s for bashing my pede. thanks

  2. #2
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    If it's 4 X4, go with the 4000kv.
    2wd - 3200 KV

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  3. #3
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    I'd say it's the other way around. Higher kV for 2WD and lower kV for 4WD. 4000 kV in a P4de will get hot rather quickly depending on how you use it.

    I have that 3200kV/MAX10SCT combo and it's a blast on 2S geared 14/52T. I use it in my Slash 4x4 which is technically the same as the P4de (I use 2.8in wheels).
    Top speed is 32mph (I'm not a speed guy - for bashings I find the speed adequate).
    Last edited by Viking; 05-14-2018 at 10:31 AM.

  4. #4
    RC Champion lektro's Avatar
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    I have to agree with Viking on this one. I also think the 4000 kv in a pe4de will get rather hot, rather quickly. I am running a 2200kv in mine and can gear it right and not worry about the temps.
    Last edited by lektro; 05-14-2018 at 04:27 PM.
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  5. #5
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    thanks for info guys. what batteries are you running with a 2200kv? 3s?

  6. #6
    RC Champion olds97_lss's Avatar
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    I run the castle sct sv3/3800kv in mine. I kept overheating the vxl 3s/3500kv when running in short grass with 2.8" chevron tires on 2S with 13/54 gearing. Replaced all bearings, even got the King Headz motor mount with the larger bearing. I could run one pack, roughly 30 minutes, then 2 minutes into the second pack, it would overheat. I run SMC 2S 7400mah packs.

    With the sv3/3800, I ran larger 2.8" trencher tires with 13/54 gearing. With chevrons, it was a bit faster and with the trenchers, it's a bit faster yet as they are a bit taller, especially at speed. I was able to run 2+ packs back to back without overheating.

    I dropped my spur to 52T a couple months ago, but haven't run it when it was above 70F outside yet. Will see how it does as I like the extra little bit of speed it gives me. But, if it runs too hot, I'll drop back down to 54/13.
    Expert rigging at it's best!

  7. #7
    RC Turnbuckle Jr. Petertje60's Avatar
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    Kv ratings of a motor does not say anything about it's power and it's usability in either a 2WD or 4x4.
    When you look at the same motor which is available in different Kv rates, most of the time the power is also the same.
    When you use different gearing, so that the 3200 and 4000Kv have the same top speed, you will probably not notice any difference.

    Most of the time the different Kv rates for the same motor are available to use with different voltages. A 4000Kv motor needs less voltage than a 3200Kv, so the most important difference is that, when using the same gearing and voltage, the 4000Kv will have more top speed and the 3200 will have a better acceleration.

    Back to the OP: the 4000Kv will prabably work better on 2S.
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  8. #8
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    You will be fine with the 3200 or the 4000. It’s all in how you gear it. I would go with the 4000 in the 2wd or the 4x4. I run a 4400 on 3s in a 4x4 and heat is not an issue for me. I am also running around 1/1 gearing. With the high gearing I have in it, I installed a single fan motor heatsink to be safe instead of possibly sorry. With a bit lower gearing, you’ll be gold! I’d run a fan with the 3200 on lower gearing, but that’s just me! Get with the 4000.
    Hope this helps!

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  9. #9
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    Quote Originally Posted by EvHexRC View Post
    You will be fine with the 3200 or the 4000. Itís all in how you gear it. I would go with the 4000 in the 2wd or the 4x4. I run a 4400 on 3s in a 4x4 and heat is not an issue for me. I am also running around 1/1 gearing. With the high gearing I have in it, I installed a single fan motor heatsink to be safe instead of possibly sorry. With a bit lower gearing, youíll be gold! Iíd run a fan with the 3200 on lower gearing, but thatís just me! Get with the 4000.
    Hope this helps!

    -Ev
    Iím glad you pointed this out. More important is the motor size being sufficient for the application.

  10. #10
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    Quote Originally Posted by Gripdog7205 View Post
    I’m glad you pointed this out. More important is the motor size being sufficient for the application.
    True. I was running a 550 can. A 540 would get a bit hotter because it can’t produce the same amount of power as a 550 is able to at the same voltage etc. I am not sure if the 4000 is a 550 or a 540, but I’d run the 4000 if it was 550 or a 540 size can. If you’re u get the 3200 or the 4000, you will be happy. Hobbywing is great!
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  11. #11
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    My guess is that you are running a 120amp Hobbywing ESC, right? I have heard the 60amp of many brands get heat issues bad with anything over 4000kv.


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  12. #12
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    Quote Originally Posted by EvHexRC View Post
    You will be fine with the 3200 or the 4000. It’s all in how you gear it. I would go with the 4000 in the 2wd or the 4x4. I run a 4400 on 3s in a 4x4 and heat is not an issue for me. I am also running around 1/1 gearing. With the high gearing I have in it, I installed a single fan motor heatsink to be safe instead of possibly sorry. With a bit lower gearing, you’ll be gold! I’d run a fan with the 3200 on lower gearing, but that’s just me! Get with the 4000.
    Hope this helps!

    -Ev

    Sorry to revive an old thread. I am looking at picking up one of these motors to replace a Velineon motor for my 4x4 Slash. I am confused on the 3200 Vs 4000 KV. I also have a Castle Creations 2400Kv for another Slash i am building but i already bought that one and will use it with a 120 amp HobbyWing ESC the SCT one of course.

  13. #13
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    Quote Originally Posted by TundraLu View Post
    Sorry to revive an old thread. I am looking at picking up one of these motors to replace a Velineon motor for my 4x4 Slash. I am confused on the 3200 Vs 4000 KV. I also have a Castle Creations 2400Kv for another Slash i am building but i already bought that one and will use it with a 120 amp HobbyWing ESC the SCT one of course.
    Iíd stay away from the 4K. Youíll have more voltage and gearing option a with a lower kv. Iím running. 3660 can 2600kv geared with VXL diffs 13/50. Itís fast, and can do standing backflips.

  14. #14
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    Quote Originally Posted by TundraLu View Post
    Sorry to revive an old thread. I am looking at picking up one of these motors to replace a Velineon motor for my 4x4 Slash. I am confused on the 3200 Vs 4000 KV. I also have a Castle Creations 2400Kv for another Slash i am building but i already bought that one and will use it with a 120 amp HobbyWing ESC the SCT one of course.
    The 2400kv on 3s would be a monster. FAST and tons of fun!


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  15. #15
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    Quote Originally Posted by MaXDee View Post
    The 2400kv on 3s would be a monster. FAST and tons of fun!


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    Man I put the 2400Kv motor in with a Hobbywing 120 amp SCT ESC into one of my slash 4x4ís today and Wow this car is wicked quick. Was used to my 4x4 Pede with the Velineon motor but this is a whole new level haha.

  16. #16
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    On 3s you can't go wrong with any of the CC motors 2200, 2400, 2650 KV.
    The 2200KV is a larger can which can dissipate more heat.

    Many times you have to also factor in what is done to the truck. Stock is around 7 lbs but mine was around 12 lbs with dual battery packs and all the steel and aluminum "upgrades".

    I have never seen a need for a fan on my 2200kv when it was geared for a top speed of 50mph. I don't remember exactly what gearing that was, but it was something like 17/40 Mod 1

  17. #17
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    Quote Originally Posted by LibertyMKiii View Post
    On 3s you can't go wrong with any of the CC motors 2200, 2400, 2650 KV.
    The 2200KV is a larger can which can dissipate more heat.

    Many times you have to also factor in what is done to the truck. Stock is around 7 lbs but mine was around 12 lbs with dual battery packs and all the steel and aluminum "upgrades".

    I have never seen a need for a fan on my 2200kv when it was geared for a top speed of 50mph. I don't remember exactly what gearing that was, but it was something like 17/40 Mod 1
    Now i am debating which motor to get for my Stampede 4x4. I live in Florida and it gets hot here in summer and the stock Velineon is not going to cut it for me on 3S.

  18. #18
    RC Champion olds97_lss's Avatar
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    I recently swapped out my castle sct sv3/3800kv in my stampede for a HW max10 sct/3200kv combo as I started running 3S. 3S in the castle system made the motor pretty hot and from what I read, the esc likely wouldn't have liked it much either once ambient temps got up above 60F. I just started running 3S last fall, so it was always cool. Then I busted the shaft off the 3800kv and instead of buying a new motor, or spending $40 on the rebuild kit... I spent $140 on a new motor/esc that had a higher likelihood of working for me this summer.

    So far, it's working really well.

    I have MIP X-Duty, FLM center diff cup w 250k oil, 54T spur/13T pinion, 2.8" trenchers on 17mm wheels, SMC 7200mah 3S lipo, HW Max10 SCT/3200kv system and a hitec 5985MG steering servo. With the castle system, I ran a BEC because it topped out at 5V. With the HW, I removed that as it can go up to 7.4V, but I have it at 6V.

    I've run it probably 4 or 5 packs at 30-32 minutes a pack. None of which was an easy bash. However, it's still cool out, highest was 47F... so won't know for sure for a couple more months at least how it does in warmer weather.

    If I had to guess, with the gearing and tires, it runs around 45-47mph as I get a hair bit more air/distance as I do with my outcast which tops out around 42-44mph hitting the same jumps at WOT... which is quite a distance. lol!

    I also have the GTR shocks with drilled out vdk/60wt oil and rc raven dual rates... the smaller shocks didn't like the big air and heavier battery.

    This was my latest bash with it at a grass bmx track:
    Expert rigging at it's best!

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