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  1. #1
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    upgrading motor?

    Can I use the tacon or leopard 4074 and seaking 180?
    Or should I go for the 4082? whats the pros and cons between the 4074 and the 4082.

  2. #2
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    Yes you can. I have run a Tacon 3674 1700kv, Leopard 4074 2000kv, Leopard 4082 1600kv, and Castle CC1515 2200kv on SK180 ESC in the Spartan.

    The larger can diameter gives you more torque. More torque means less RPM loss under load, and the ability to turn larger props without overloading the motor.

    NOTE: I fried an SK180 Esc running the 4074 2000kv on 6S turning a P220 prop. And I only run up to 5S on the CC1515 2200kv running a X442 prop. The moral being; you can overload the SK180 if you get carried away.

    hog

  3. #3
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    So whats the better option? the 4074 or the 4082

    Im not wanting any crazy speed. I just want a reliable boat. I have the kintec cnc prop and Ill prop. just stick with it. I also would like as long of runtime as possible, which is why im leaning towards the 4074...

  4. #4
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    All else equal, the larger the motor, the more power it will draw, in general.

    What kv is the 4074 you are looking at?

    The 4082 1600kv is a proven solid combo. Not to say the 4074 wouldn't be.

    hog

  5. #5
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    I can get a 4082 1250kv for $85 shipped from someone on another site. Is this a good deal?
    I wasnt looking at any kv in particular. Havent made it that far yet.

  6. #6
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    I use the 4082 1600kv for additional $6, I use it often, until my batteries where out of charge, so far so good, recommended by hog (thanks) runtime would depend on your driving, batteries mah and c rating.
    Sharing is the best thing to do on EARTH legally.

  7. #7
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    A quick look on line shows pricing on the Leopard 4082 ranging between $85-$105 for new product. So $85 is a fair price if the item is new.

    1250kv will certainly work, it is lower kv than what most have chosen to run in the spartan. Running stock prop you will loose some speed.

    For reliability, my leopard motors have been very good so far, and lower kv will mean lower RPM's, and, very generally speaking, the slower something turns the less wear and tear (driveline etc.)

    Running 6S (unloaded RPM)
    1800kv = 39960 (stock Spartan version 2)
    1600kv = 35520 (stock Spartan version 1)
    1250kv = 27750

    For comparison, an 1800kv motor on 4S runs 266640 rpm. So the 1250 on 6s is pretty comparable to an 1800kv on 4S.

    hog

  8. #8
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    is 1250 kv too low?

  9. #9
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    Only you can answer that.

    If you stay with stock prop size, will you be satisfied with what will essentially be 4S performance?

    A 4082 1250kv is going to have a lot of torque, so turning higher pitch props to compensate for speed loss will not be an issue. However, larger props tend to increase torque roll....

    If I were make a suggestion, it would be to go with the 4082 1600kv motor because there have been several Spartan owners, myself included, that have found the 4082 1600 and SK180 combination successful, and are pleased with the performance.

    That is not to say the 1250 wouldn't work fine, just be aware you are going to loose speed unless you prop up, and it is unlikely you will be able to fully regain the top end you would get with an 1800kv running stock prop.

    1600kv will give you excellent performance, and, the torque to spin a large enough prop to recoup any speed loss, if that is your desire.

    hog

  10. #10
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    So I am thinking about purchasing a leopard 4082 but can't decide on the 1600kv or the 2000kv. What would be the difference. I know the 2000kv will be faster but will it over heat on 6s and have enough torque ? Thanks

  11. #11
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    Ffrom what I understand 2000 would be too much for 6s

  12. #12
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    paulfromtulsa:

    What ESC are you running? SK180?

    A couple things to consider

    1. the 4082 is larger both in diameter and length than the stock 3674 1800kv motor, and a larger motor is going to pull more amps.
    2. the higher the kv rating, the more amps the motor will pull.

    So a 4082 1600 will have a bit of a trade off compared to the stock motor, higher amp draw due to larger size, but a bit of an amp draw "rebate" due to lower kv rating than stock.

    The 4082 2000kv on the other hand is pulling more amps on both size and kv.

    I fried an SK180 running a Leopard 4074 2000kv motor, but I was running 6S and a P220 prop at the time.

    If you are looking for a reliable setup, my suggestion would be to go with the 4082 1600 based on a history of solid reliability and good performance. You can prop up a bit on this setup to compensate for any loss of speed due to lower kv on motor.

    If you're feeling adventurous and want to experiment, the 4082 2000kv could probably work with SK180, but my suggestion would be to run only 4S or 5S and keep the prop size close to stock. This is based on my not so successful experience running the 4074 2000kv, and my current setup in one Spartan running SK180 and Castle CC1515 2100kv on 4S and 5S only with either a P215 or X442 prop. So far this setup has been reliable for me.

    hog

  13. #13
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    Thanks hog I think I will just stick with the sk180/1600kv setup on 6s. What is the largest size prop that I can run safely?

  14. #14
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    I find the P220 works well, and is what I have stuck with.

    I have run an X645, and P225 as well and the motor will turn them with no problem, but the larger props create more torque roll.

    If you have the desire, try a few different ones to get your own results, but I you are looking to buy only one prop, the P220 would be my suggestion.

    SJS also runs the SK180 4082 1600 combo with great success, he, or others, may toss in a suggestion or two as well.

    hog

  15. #15
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    Get a 1521 neu motor 1577kv and a hydra ice esc.

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