Ammo motor slower than stock?

[makin' waves]

Hi guys,

I've installed a new ammo 2300 motor, and I was dissapointed with the performance, I mean it was noticeably slower
than with my stock setup??

All my batteries, esc, prop setup is the same, i just changed the motor....

this leads me to another question. I solderd on new 5.5mm bullet connectors from the esc and to the motor,
my soldering isn't the best as i'm new to this, so if my soldering wasn't upto standard would the boat run any slower or
would it just not work atall?

My boat does run its just slower.. any ideas guys?

Thanks for any help

Tone

[Fluid]

Assuming the motor is good, then you may have too much prop installed. Higher Kv motors often need smaller props, which they spin faster to make more speed. What prop are you using?

There are other reasons for the low speed, but without seeing the boat it is hard to tell from half way across the world.



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[makin' waves]

Hey Fluid,

I'm using an x440 prop, thats been S&B...

I'm asuming the motor is good, just got it brand new from OSE

Tone

[Darin Jordan]

Isn't an Ammo 2300 motor also a 2-pole motor, vs a 6-Pole for the stocker?? I think that's the case, and if it is, you are losing a BUNCH of torque...

[7500RPM]

Isn't an Ammo 2300 motor also a 2-pole motor, vs a 6-Pole for the stocker?? I think that's the case, and if it is, you are losing a BUNCH of torque...

I am not sure if the Ammo motors are 2 pole, as I bought a Ammo 1800 KV to put in my SV27 to replace the original blue can one, and there was NO difference in speed using the same prop ,( X642 ) and batteries, and run time, temps were the same. But as Fluid said you need to prop down on the Ammo 2300KV motors.

[Fluid]

I tried to find a definitive answer - no luck, but the consensus is that this is a 2-pole motor. You will lose some torque, but I would not you'd lose a "bunch" of torque - it is a slotless design. Still it should provide more speed and is recommended by Grimracer as a replacement motor for the SV27 - so it is not at all inappropriate. Perhaps the soldering job is poor, but then I'd expect more trouble than just slow. No changes in the transmitter or receiver settings? You really can't prop down any more, an x440 is small.

Just because the motor is new doesn't mean it isn't defective. The Chinese motors have spotty QC and a bad one slips by now and then. Make no changes to ANYTHING, just swap out to the old SV motor and see how it runs. If it runs the same then I'd suspect the motor. Remember, change nothing else!


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[Fluid]

There is no replacement for displacement...

Of course there is! It's called positive manifold pressure. 3.0 liters, 18 psi, 340 rwhp.

[1truckerdan]

I agree with ya fluid....my 05 Subaru LGT 5eat wagon/ 2.5 (h4) turbo is pushing 318hp at the wheels 12.38 @124mph in the 1/4 mile.
Picture 175.jpg
I love the look on the drivers with a v8 when a wagon eats them up

[1truckerdan]

Also...I called Joe Ford at CC the other day and he just happened to have an ammo motor (ammo 3656 1800kv) in his hand and I asked him if it was 2 , 4 or 6 pole.He counted it and confirmed that it is 6 pole motor.
Daniel

[Fluid]

He counted it and confirmed that it is 6 pole motor.

Good to know, so much for consensus.



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[makin' waves]

Thanks for the input guys,

I'll try the stock motor again, then retry the ammo...
I hadn't changed any of the rx or tx settings, so i'll just wiat and see

Thanks again

Tone

[7500RPM]

I agree with ya fluid....my 05 Subaru LGT 5eat wagon/ 2.5 (h4) turbo is pushing 318hp at the wheels 12.38 @124mph in the 1/4 mile.
[ATTACH=CONFIG]58963[/ATTACH]
I love the look on the drivers with a v8 when a wagon eats them up

I guess you have not drag raced a real V8
Of course there is! It's called positive manifold pressure. 3.0 liters, 18 psi, 340 rwhp

A big Block chev with that kind of boost would make at least 1200 HP.

You need to go to Lethbridge Alberta, for the Street Machine weekend and see the 100 Ft drag racing, the Real Cars, 0-100ft in sub 2 second runs!

[Darin Jordan]

Good to know, so much for consensus.



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HOWEVER... You guys are looking at the 1800 motor, and assuming that it's the same pole arrangement as the 2300KV motor... The 2300 motor is listed on the Tower site as a "slotless" motor design, so I'm not even sure how you'd count the number of poles without cutting the rotor apart.

I could very well be wrong, but I KNOW a UL-1 motor is 6-pole, and most people that put one of those in their SV27 have no issues making the boat faster. The 2300KV, IF it's a 6-pole, with perhaps just a tad less prop, SHOULD provide an equivalent boost in performance... If it's considerably slower, then I'd suspect it's simply doesn't have as much torque/power, which may indicated it's NOT a 6-pole motor.

Another clue might be that the AMMO 2300KV motor is a 36-50-2300, while the AMMO 1800 is a 36-56-1800... The "56" indicates that the 1800 motor has a 6mm longer rotor. That would give it more torque as well...

[7500RPM]

You need to remember, the higher the KV you go, you need to prop down, regardless if they have the same pole count! the torque is never the same with higher kv motors

[1truckerdan]

I never claimed my Subi was a " drag race car" just that a 4 cylinder can keep up and pass a v8.( I also get 20+ mpg)
A few years ago I helped a buddy put twin turbos on a 460 with only 7lb of boost and it was around 980hp and 1400lb of torque......remember the hp don't matter if you can't plant it to the pavement!