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  1. #1
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    e-revo 2650 on 3s lipo?

    i have a mamba monster with a 2650kv monster motor and how fast will the 2650 on 3s compare to the 2200kv on 4s and am i at risk for damaging any thing electrical wise. i have a 3s 5000mah 25c traxxas pack . thanks

  2. #2
    RC Turnbuckle Jr. Cameron's Avatar
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    http://www.scriptasylum.com/rc_speed/top_speed.html

    check it out in here. not a science but it will give you an idea of what it will do.

    i want to think that battery wont push enough amps for the MMM but im not certain. 125 amps is basically the bare minimum recommended but i don't know what they do if they run under.
    (RAH) (AH) + [ROMA (1+MA)] + (GA) + (OOH)(LA)

  3. #3
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    what if i run two of them parrellal? that would double the mah to 10000

  4. #4
    RC Turnbuckle Jr. Cameron's Avatar
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    by the math (mah x C)/1000 that makes 250 amp but i don't know if that calculation is proper for parallel or not.
    (RAH) (AH) + [ROMA (1+MA)] + (GA) + (OOH)(LA)

  5. #5
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    hmmm maybe i should just buy some extra packs to be on the safe side lol
    but i know on the traxxas packs it says 125amp minimum and 250amp burst for 1 3s 5000

  6. #6
    RC Turnbuckle Jr. Cameron's Avatar
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    That just means they are a 25c (50c Burst) pack. Very common.
    (RAH) (AH) + [ROMA (1+MA)] + (GA) + (OOH)(LA)

  7. #7
    RC Turnbuckle Jr. 87 GN's Avatar
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    one 3s 5000 mAh 25c correct

    Batts in series double the voltage:
    2x 2s 20c 5000mah = 4s 20c 5000mah

    Batts in parallel double the mah capacity:
    2x 2s 20c 5000mah = 2s 20c 10,000mah.

    You can run one 3s... it will be slow like turtle. I have read of guys using one battery for young
    (or newboobie) drivers.

    change the cell volts....& gearing
    http://www.scriptasylum.com/rc_speed/top_speed.html

    Import this:

    Differential Ratio: 2.8461538461538463
    Transmission Ratio: 1.8333333333333333
    Other Ratio: 1
    Spur Tooth Count: 54
    Pinion Tooth Count: 21
    Total Voltage: 22.20
    Motor KV: 2200
    Tire Diameter (inches): 5.9
    Tire Ballooning (inches): 0
    Motor Current Draw: 0
    Motor Coil Resistance: 0.006
    Spur/Pinion Ratio: 3 : 1
    Total Ratio: 15.65385 : 1
    Tire Circumference (inches): 18.54 inches (470.8 mm)
    Rollout: 1.18:1
    Total Motor Speed: 48840 RPM
    Vehicle Speed: 54.76 mph (87.97 km/h)
    Effective KV Value: 2200
    KT constant: 0.61 oz-in/A
    Last edited by 87 GN; 03-31-2012 at 09:09 PM. Reason: hehehhe I can spelell
    Would you go flip my truck back over??

  8. #8
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    2200kv*14.8= 32,560rpm

    2650kv*11.1= 29,415rpm

    So if you gear it up (to go faster) you should be getting decent track speeds (30-40mph).
    Last edited by anr2442; 03-31-2012 at 09:28 PM.
    Its All relative to your perspective.

  9. #9
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    Lol I am trying to soak it in guys, so I won't fry my esc
    ph yea thanks for the info
    Last edited by Kitchen; 03-31-2012 at 11:07 PM.

  10. #10
    RC Turnbuckle Jr. O.G.'s Avatar
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    Yea higher math makes me dizzy.
    My Black & Blue Rally is faster than your color...

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