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Old Mar 13, 2012, 09:00 PM
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Question
Hobbywing Seaking 2848sl 3900KV

I have a Traxas Blast and just burned up the stock 20t stinger motor. I want to replace the motor with a small brushless motor. The can size of the stock motor is 3650. I have to stay with that size or smaller so the battery can pass between the motor and top of the boat. Anyone know if the Hobbywing Seaking 2848sl, 3900kv makes more power on 2s Lipo than the stock 20t brushed stinger motor?
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Old Mar 13, 2012, 09:32 PM
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Yes it will make more power.......probably 3 times a s much. I would go with a lower kv motor though, something in a 3650 or 2848 and less kv than 3900.........

This on 3s - http://www.nitrorcx.com/96m283-2848-2300kv-17t.html

or this on 4s - http://www.nitrorcx.com/96m296-3650-1500kv-25t.html
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Old Mar 13, 2012, 09:50 PM
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Thanks for the reply. The stock battery box was designed for a 6cell Nimh. A 5000Mah 2s Lipo just fits snuggly. Anything larger will not pass between the motor and top of boat. Thats the reason I was considering the small motor with high kv. I did not want to buy something with less power than I had. Anyone know if the mounting screws on the Hobbywing Seaking 2848sl is 25mm center to center?
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Old Mar 13, 2012, 09:54 PM
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If it were my boat I'd run this on 2s...........

http://www.nitrorcx.com/96m32-car-2848-2618.html
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Old Mar 13, 2012, 10:08 PM
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Quote:
Originally Posted by scorpion1 View Post
If it were my boat I'd run this on 2s...........

http://www.nitrorcx.com/96m32-car-2848-2618.html
Thanks, That link shows a 2858. I believe the 58mm is to long to fit.

I was considering a small Outrunner Watercooled ADS400XXL but the mounting holes are only 16mm. I would have to make an adapter or find one that would go 16mm to 25mm. I wonder if this motor would make more power than the stock stinger.

http://www.hobbyking.com/hobbycity/s...tor_Boat_.html
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Old Mar 13, 2012, 10:32 PM
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The motor screws won't be 25mm on the 28mm motor, that's for sure.
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Old Mar 13, 2012, 10:39 PM
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Well, if length is an issue I would run this 4 pole motor..........great torque and will put out about 4 times the power of the stock Stinger motor...........which by the way pulls about 12 amps X 8v = 96 watts.........give or take.

http://www.hobbyking.com/hobbyking/s..._Inrunner.html
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Old Mar 13, 2012, 11:23 PM
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Okay I am learning. Its looks like the mounting hole spacing on the 28mm brushless is pretty standard at 16mm and 19mm. That brings me back to a short 36mm if I match the 25mm stock mounting. I am stuck with the stock prop. I figure, I can turn 1-1/2 to not more than double the stock motor RPM without breaking everything. What choices does that leave us with in a reasonable price range for a toy boat? I have to have something in max 35 to 40amp range or the ESC will be to large to replace the Traxxas Nautilus.
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Old Mar 14, 2012, 10:27 AM
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400 motor

Now on hobbyking, i tried to answer your ? but couldn't find the listing any more.I was looking for the the 36 56 04-2600 Turnigy motor as i have 1 and runs great. Now like Scorp mentions; on a 3900 use 2S and a 632 Octura prop. I would beef-up the motor area with fiberglass and put rails for motor mount area so hooks don't develope cause mine did it and i had to epoxy resin the outside bottom where hook area came up so things were straight. Ok, another motor for that boat is a outrunner 3656-1700 that can use 3-4S lipos. I use a 37.5 carbon fiber prop and flies. When i try and spin the motor shaft, you can feel the strenght of magnets. I have 2 of these motors. I found the 3656-1700 on page 5 of leadershobby.com under outrunner.Leadershobby.com
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Old Mar 14, 2012, 10:34 AM
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Well darn!! Did they drop the gold can line retoabcr???? I hate that if they did..............i have used many of those over the years and still run several. He needs a 2800-3200kv 3650 with a 1/8 shaft.................
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Old Mar 14, 2012, 10:45 AM
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Scorp; i have several of the gold line like 3900's. I'll search again. I like the 36 56 -4-2600 on 3S for 22-24" boats-perfect match. I'll try now.
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Old Mar 14, 2012, 11:13 AM
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I did a search for 36 40 05 3900 been dropped--- B36 56 04-2600 been dropped
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Old Mar 14, 2012, 11:16 AM
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Go to Offshore site for Feigeo motors as Steve has a sale on them, hurry. Steve's out BRUSHED MOTOR TIME or EBAY..
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Old Mar 18, 2012, 08:59 PM
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Thanks for all the help

The entire motor, esc, servo and receiver can be removed from the blast by just taking out six screws. I believe the easiest thing to do is to drill two screw holes at 16mm oncenter slightly offset from the original 25mm motor mount. These will then accept the 28mm brushless motors.

In the meantime, where tthere is a will, there is a way. I mounted a Traxxes Titan Brushed 12turn 550 motor and 30amp Proboat ESC I had. Had to removed the battery tray to fit the 550 size in the boat. The battery is now held in place with velcro on the battery and bottom of the boat. The ESC fit perfect. The boat is a lot faster and the motor and ESC doesn't run hot. I am satisfied until this motor expires.
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Old Mar 20, 2012, 08:46 PM
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I'd avoid the HK outrunner. Mine on 3s snooker after about 20 sec.on a ZigZag.
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