Which Motors For the EKOS?

[LarrysDrifter]

I finally get to rehab my best looking junk boat-the EKOS.Im unsure what motors to run.Should I get the 380 10xl or a 540 size motor?I do want to run 4s per motor and maybe Octura x442's.Speed goal of 50mph at least-but reliably.I was also looking at the Turnigy or Sea King esc.Hobby King is out of stock on the Turnigys and the Sea Kings look to be the same esc anyway and you get a programming card with it too.They would be 120 amp of course.Would the 380's run cooler?Id like to mess with different props but am worried the 380's wouldnt give me too many options.Any suggestions?

[Steven Vaccaro]

Shooting for 50 plus mph I would suggest the feigao 380 9xl's.

[forescott]

9xl's are the way to go. 50mph is attainable on 32mm props on 4s. Or 40mm props on 3s

[Simon.O.]

9xl's are the way to go. 50mph is attainable on 32mm props on 4s. Or 40mm props on 3s

With this setup what sort of Amps are you pulling ?
I am repowering my bigger cat (similar size to a Ekos) and the motors are on the way now but can be used eleswhere if they are not suitable.

I am keen to see what sort of amps a 40mm prop on a 380-9xl will pull ?

Watching.

[vasy]

Turnigy 120a are back in stock, go get them :)
10xl on 4s and 40 to x442 will get you your speed and stay warm.
We tested it at 50-55.
9xl should give you maybe a bit more speed but probably pull a few more amps.
on 10xl peak is around 70, but can't say average. on 40mm props passes the 10 second heat test on x442 about 7.

[forescott]

My 9xl's didnt pass the 2 second heat test on 3s and 442's. And i'm running wire drives(less friction). I need to get some data logging tools. My best top speed on the 9xl was with 40mm props on 4s @ 55.2mph.

[vasy]

My 9xl's didnt pass the 2 second heat test on 3s and 442's. And i'm running wire drives(less friction). I need to get some data logging tools. My best top speed on the 9xl was with 40mm props on 4s @ 55.2mph.

So 9xl is faster, our best recorded so far on 10xl was 51.xx I just can't recall the xx.
On x442 we had some issues with water when we tried to GPS is, it was just way to choppy for a reliable reading, we got 52 but the boat wanted to fly.

[LarrysDrifter]

Thanks for the input guys.I see the benefits with both.I want the speed but I also want the cooler running more than the speed.Which would be cooler-9xl or 10xl?

[forescott]

You would be perfectly happy with either. Kinda depends on the prop you want to use. 32 0r 36mm props=9xl. 40mm props=10xl. I would go with the 10xl. A little more torque, still plenty of speed.

[LarrysDrifter]

You would be perfectly happy with either. Kinda depends on the prop you want to use. 32 0r 36mm props=9xl. 40mm props=10xl. I would go with the 10xl. A little more torque, still plenty of speed.

Your other post said that 9xl's are the way to go.I just got done ordering the 9xl's and 32mm props.Which motor would produce the least amount of heat?I know water temps are high rite now.

[FighterCat57]

Your other post said that 9xl's are the way to go.I just got done ordering the 9xl's and 32mm props.Which motor would produce the least amount of heat?I know water temps are high rite now.

I'm willing to bet 4s 9xl 32mm prop = 51-52 MPH.

Should sound really cool at high RPM too! I'm running 2700kv 540's on 4s w/32mm props. Really neat sound and some cavitation which seems to help keep the heat down by reducing the load. Only pulling 53 amps peak. I don't hole shot it, just run it up to speed.

Should be a good setup!

[forescott]

I have the 9xl's and love em. But you said your looking for a cold setup with not so much emphasis on speed. Both motors are great and similar in performance. Dont worry, the 9xl's are awesome. Just dont try and run a 42mm prop with them. Stick with the 32 or 36mm venom 3-blades. The 10xl will produce less heat on the same prop, but 32mm props are no problem at all. I just ran my ekos a couple of days ago on the 9xl/32mm prop/4s lipos. Got 50.2 mph and NO heat. You made a wise choice. If you chose the 10xl, I would just say use the 36mm -40mm prop for similar speed/heat.

[forescott]

Are you planning on running 3s or 4s??

[LarrysDrifter]

Are you planning on running 3s or 4s??

Plan on 4s.I was on HobbyKing to get the Turnigy 120's and theyre out.Went to Hobbyhot and got the Hobbywing 120 esc's.They look exactly like the stockers.And they come with a programming card(which I only need 1).I was pretty nervous when I was buying the motors earlier.Thanks for setting me straight.Now Im on the search for two 4s batteries.HobbyKing is out of Turnigys and I dont know what size will fit.(Took the battery tray out too).Might go to LHS and size some up.Id like to find a 4500 or 5000mah with at least a 30c rating.Dont know if a 5000 will fit though.And Im not looking to spend 300 bucks on batteries either.I really appreciate everyones help with my project.

[vasy]

4s go with 10xl.

Hobbywing 120 esc's are nice and they ship fast from hobbyhot. Remember if you spend there $200 (total from all orders) ask them to add you to the discount club for extra 5% off.

4s up to 4000mah seem to fit fine, any more and you are playing with fire.
I'd try this pack that they have in stock: http://www.hobbyking.com/hobbycity/s...idProduct=9511
I lent the guy 3s of this size and it fit fine into a stock tray. (just)
We tried 4500 and had to remove tray and foam from the canopy to make it fit. Not worth the hassle for a few extra seconds of run-time IMHO.