Battery question

Originally Posted by Snipin_Willy

123-126F is luke warm on a motor. My truggy is pushing 175 after 20 min mains of conservative driving. And I'm running a 1515 2.5D tekno neu. Ambient air temps were quite high though as well as humidity levels.

3s on a 2700kv motor is enough to race with. It pulls more amps than a lower KV motor on higher cell count, but that's where it's getting the power from. Until you're seeing upwards of what I'm experiencing, I wouldn't go to 4s unless you had a lower KV motor.

hmm...i guess it's a 3S for this motor and the race, then.

[suicideneil]

One would gear down when using higher voltage, otherwise you will be spinning the wheels to fast to control the truck.

I think your genral issue is that the motor you have is too fast for 4s & racing (4s & bashing would be fun though), yet on 3s it will be pulling quite a few amps if not geared conservatively; most people tend to run the 1515 1y on 4s, or the next slowest motor option on 4s/5s.

I would stick with 3s if its working good for you, just gear as required to get your desired speed and 'oomph' levels vs temps.

Originally Posted by suicideneil

One would gear down when using higher voltage, otherwise you will be spinning the wheels to fast to control the truck.

I think your genral issue is that the motor you have is too fast for 4s & racing (4s & bashing would be fun though), yet on 3s it will be pulling quite a few amps if not geared conservatively; most people tend to run the 1515 1y on 4s, or the next slowest motor option on 4s/5s.

I would stick with 3s if its working good for you, just gear as required to get your desired speed and 'oomph' levels vs temps.

ah...well, I guess it's best that I stick to the 3S packs. Guess I'll get me a couple of the TP 40c packs.

sheesh, that's alot of $$$.

hokay...I'm stuck between these choices. Any recommendations? I'm looking for good power, reliability and best cycle life.

http://www.rc-monster.com/proddetail...pq3s6000mah25c

http://www.rc-monster.com/proddetail...d=HP-LVX50003S

http://www.rc-monster.com/proddetail...p263s2p&cat=18


any suggestions?

[Arct1k]

Honestly you'd be better off selling the motor - You'll always be fighting with that high of a KV...

Originally Posted by Arct1k

Honestly you'd be better off selling the motor - You'll always be fighting with that high of a KV...

come now, man...surely what you say is sacrilege?!

sell...my...motor? yikes!

hokay...so say I was to sell my beloved 1.5D, what motor would I need to pick up? I'm looking for something similar in terms of speed and power.

any suggestions?

or wait a minute...


maybe I can try all three!!!!


any feedback on these batts, though?

and FWIW, I absolutely love the speed and the power that this motor gives me. :)

that, and I only have one 4S in my battery flock. The rest are 2S and 3S.

Tis' another reason why I'm partial to the motor: it works well with the current battery inventory that I have.

[Arct1k]

sames series - trade down the KV to something in the 4s range 1800-2200kv

Originally Posted by Arct1k

sames series - trade down the KV to something in the 4s range 1800-2200kv

ok.

how is the motor comparison, though? How would a 1800kv on 4S compare to a 2700kv on 3S? a 2700 on 4S?

[suicideneil]

If you match the motor kv to the voltage, and aim for the 30-40,000rpm range, then 'power' will be pretty much even once you take into account gearing for the same speeds.

Anyways, the PolyQuest 3s lipo is pretty beasty, but I would look into the new Hyperion Gen3 packs (Mike only has 5s packs at present), should be able to find them for sale somewhere- Mike wont mind as he doesnt sell them

ah hmm....I see. I think.

I think I may give it a shot, then. Need to find the $$$ for the motor first, though.

what about the PolyQuest vs. C-Tech RC packs? I've been hearing about the G3 packs, but I'm trying not to break the bank in my purchases. At least not yet...

I'm liking the C-Tech for it's budget, but I'm also liking the PQ for it's capacity.

Anyone have feedback on the power delivery comparison for the two packs?

[Snipin_Willy]

I only have good things to say about my C-Tech 25c packs. I run them in my truggy and they have awesome power.
I'm not sure if you wanna go with 4s battery or whatever but a lower KV motor can really open up your battery options.