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Thread: Motor upgrade for J.A.E. .21 on 4s ?

  1. #1

    Default Motor upgrade for J.A.E. .21 on 4s ?

    Hi all looking for a motor upgrade for my jae 21 . At present im using a Leopard 3674 2200 kv with a Seaking 180 V3 esc with 6mm plugs with blue Turnigy 4s 5000 mah 40c lipo's giving me a speed of 64mph. I would to prefer to stay away from a Nue since im just running for fun . What motor brand and KV would be a possible for a upgrade to sqeeze a little more speed that would fit the original aluminum motor mount ? Regards Andris Golts.

  2. #2

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    Andris, you can go up to the 40 mm motor size with a kv of between 2200 and 2400. look at the T.P. motors of the 4050 and 4060 sizes , i wouldn,t go for the larger 4070 series as they are battery drainers. There is also other very good size motors for this rigger such as the Castle 1515-2200 and the HET-Typhoon 700-68-2250 which i run and like this motor very much as its got plenty of power and doesn,t drain the battery packs [ very efficient ] . all of these motors will bolt straight into your mount.

  3. #3

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    A larger format motor is not required in the small, lightweight, easy to push JAE21. I have run a Castle 1415/1Y (2400 Kv) for years in mine, getting 12-second laps on the NAMBA oval with speeds in the upper 70s in oval trim. Leopards are not that good IME, try a Castle 1415/1Y, a TP3640/3Y or a TP3650/5D. Get a decent quality pack, remember that all the power in an FE boat is in the battery, not the motor. A cupped H-7 works for me, although one of the newer 17* ABC props may work even better.

    How big is the pond the boat is running on? If it’s too small the boat will never be able to reach its true top speed.


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    ERROR 604 - Caller's Buffer Is Too Small
    1. Ensure that your port is not configured to a mini plug
    2. If you are still having problems, contact someone

  4. #4
    Join Date
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    I have a Tp 3640 3y waiting to go in mine soon as I get done with paint. I will let you know how well it runs with it.

  5. #5

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    Thanks to all for the great information Fluid the pond we run in is 1/2 mile wide and 2 miles in length they run .90 size nitro classes and large gas cats in this pond. Regards Andris Golts.

  6. #6

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    I did try a Castle 1415-2400 in my jae-21/fe with h7 prop and the motor did seem to just suck out battery power quickly, swapped over to the Het 2250 motor and all was then great. I feel the 1415-2200 motor is a better choice than the 2400 model especially if your racing.

  7. #7

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    They must have changed the mount then rol243, do the side cheeks come with concave ends now? Mine is an early one but to put a 40mm motor in mine for SAWs I had to file out the side cheeks of the mount quite a lot to get the fatter motor into the stock mount.
    Paul "tug Killer" Upton-Taylor, Cat lover.
    FastElectricBoats.co.uk

  8. #8

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    Yes the stock motor mount for the 21/fe needs to have some filing done on each side of angle pieces so the 40mm motor can fit in between , easy job if you use a grinder.

  9. #9
    Join Date
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    20180913_135434.jpg just in time for Halloween...lol

  10. #10
    Join Date
    Jan 2013
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    If you ever get around to building a jae12 making it fe. I have a Tp 2940 2800kv on a 2200mah 4s roaring top lipo with a ABC 1514-17-45 prop runs great.

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