Impulse 31 v2 on 6s? Its running fine on 5s

[Arizonaheat]

There is no difference between 1800KV on 5S vs. 1500 on 6S. (actually, 1500 on 6s is technically easier on the ESC since you are feeding more volts and less amps, but don't worry about that...). Both have the same RPM and therefore same speed. So you should pick the motor you want based on what lipo packs you have. If you have 6S (or two 3s) packs, then you should get the 1500kv motor and run the 6S config. If you have lipos that make up 5s (either a 5S or a 2s + 3s), then you should stick with the 1800kv motor and run 5S config. If you have not bought your lipos yet then you can go either way-- try to plan ahead on your next boat so you can share packs across your fleet.

I've standardized my fleet on 4S1P and 4S2P configs made from two 2S1P 5000 packs-- I can use my lipos on all of my boats (except for 1 that is the oddball 3S boat...)

If you set up the boat right and use a sharpened and balanced stock prop, you should get good speed on 1800 w 5S. Strut setup makes a huge difference-- too wet and the boat will go very slow. Too loose and it will run fast but hard to control.

Chief

PS, I meant 1800 kv on my ealier post, not 1900... 1800kv x 5s (3.7v x 5)= 33.3K RPM. I edited my post to fix that.

Not necessarily...you need to do a power calculation...it's really not volts versus amps...it's both plus you need to look at the I squared R losses in the wiring and the connectors...

[Bduncan]

6s is alot for that boat if everything isn't perfect.

[BHChieftain]

Not necessarily...you need to do a power calculation...it's really not volts versus amps...it's both plus you need to look at the I squared R losses in the wiring and the connectors...

What part of my post are you referring to?
Chief

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[Arizonaheat]

The "technically easier on the ESC" part...assuming you have an ESC that can safely handle 6S, you need to figure out the power used by the motor.

[BHChieftain]

The "technically easier on the ESC" part...assuming you have an ESC that can safely handle 6S, you need to figure out the power used by the motor.

I agree with that. But all else being equal 6s on 1500kv (from the geico) would be easier on the ESC than 5s on 1800 (from the impulse)--exact same rpm between the 2. But I don't think the difference is meaningful on these configs.

If your prop is too big in either case or if you don't have decent connectors problems will creep up.

Chief

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[Bduncan]

I was talking about savage skidoo's rubber duck rescue boat on 6s

[Insaniac]

Be careful with 6S voltages...a lot of ESC's "claim" 6S...the BEC will be the first to go...
JMHO

I agree with that. But all else being equal 6s on 1500kv (from the geico) would be easier on the ESC than 5s on 1800 (from the impulse)--exact same rpm between the 2. But I don't think the difference is meaningful on these configs.

If your prop is too big in either case or if you don't have decent connectors problems will creep up.

Chief

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[Bduncan]

I ran 5s 1p 6000 mah on my revolt for a while with stock motor and 180 esc. It was borderline too much for the boat.

[Bduncan]

Also, just an opinion. To a certain extent i think over modifying these little stock boats like revolts impulse and spartans is fruitless. You end of having stock equipment that is virtually worthless. When you add the aftermarket equipment time etc... a build or almost ready to run boat would have made more sense.

[waterproof]

Its been around 10 times now on 6s with all stock on the boat.
Im impressed, my experiance is that the motor cable and battery connection is not so hot if you not drive almost on 100% trottle all the time on the battery pack.
I cant see the problem to run the proboat impulse 31 v2 on 6s.

I understand that how more rpm the motor gets how faster could it get damaged.

40000rpm is a lot but it looks like the motor can handle it.
The temprature in the water is about 15 celsius. If its run in warm water at a hot day in the us i think you could heat it up if you drive almost at full trottle all the time on one battery time.

Im not afraid for its going to melt on 6s with this boat. I drive carfully and the box says 6s.
The factory could make the motor cable twice as tick to make a perfect 6s rtr boat but i dont see it as a big problem, but maby its a problem where the weather is much warmer :-)

[dvrmn]

I run my Impulse 31 V2 on 6s all the time. Have 100+ runs. The only problem I've encountered is the factory bullet connectors aren't good enough for that current draw. I melted a factory solider joint in the factory bullet connectors. I switched them out with the Castle Creations 4.5mm bullet connectors and haven't had any issues since.

[Bduncan]

Although it may be slight overkill i run 6.5mm on everything even 4s set ups. Check out the new castle 6.5mm bullet plugs on ebay. Very nice.

[Bduncan]

Traxxas says 6s for the Spartan on the box as well. how many people have smoked that set up? Castle designed the esc and the motor and they will tell you it isn't a reliable 6s set up. There are many variables that lead to melt downs and smoked Esc/ motors. Some people have really thinned props smaller diameters etc... And never have a problem. If you cant afford to take a lick then don't run it on the edge. If you look at the motor battery table on the castle website, almost all of the setups recommend 8000-10000 total mah regardless of 4s or 8s. Running two 4000 mah batteries is at the low end.