I tried the kyosho diff in my buggy ( ratio = 4.3 ) and now the esc temps was cool but I think my 8xl was demagnetized it run cooler and he dont have heavier break power and overheat the esc very fast so I tried my neu 1509 2.5d 2700kv @ 4s it work fine the esc was cool and the batteries too but the motor get hot around 172f I think this can are to small for 1/8 rc's right ? and finaly I run my neu 1515 2.5d 1700kv motor and esc was cool but on 4s the power was not cool its a 5s and 6s motor for sure... later I tried my neu 1509 2.5d 2700kv in my 1/10 e-revo and overheat alot! this can are best for small lightweight rc like traxxas slash or hpi e-firestorm

That all sounds right to me. I have raced a lot with 1515, 1512, 1509 motors, all on 4s and all in the 1700-1900kv range. 1515 2.5d in this video... http://www.youtube.com/watch?v=I7c-i...e=channel_page

I have also been racing a 1509 (1820kv) recently with some success. It's been running hotter than I like the last few races, with temps as high as 180 (and thus not as efficient as I like) but it's worked really well at some other races, not getting over about 130. 1/8 buggy is pushing what this motor can do, especially if the buggy is NOT light. (My Caster was only 7.5lbs race weight with the 1509 setup) It has plenty of power, but it's not proving to be as efficient. I think a lower kv/6s setup would work pretty good though.

Your 1515 can run great on 4s... just needs more gear. You didn't say what you geared it, but with the kyosho diffs and 46t spur, you need to be at least 16 on the pinion to start getting "fun" speed out of it. Might want to go back to CEN diffs and try it again. :)

I'm going to start running my 1515 again too. :)

Feigao = junk lol

for the neu 1515 on the buggy im running 50t spur ( I used the kyosho center diff also ) and 21t pinion here the info :

Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 50
Pinion Tooth Count: 21
Total Voltage: 14.8
Motor KV: 1650
Tire Diameter (inches): 4.3
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.01
Spur/Pinion Ratio: 2.38 : 1
Total Ratio: 10.2381 : 1
Tire Circumference (inches): 13.51 inches (343.12 mm)
Total Motor Speed: 24420 RPM
Vehicle Speed: 30.51 mph (49.01 km/h)
Effective KV Value: 1650
KT constant: 0.82 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...


motor and speed run cool but im feel a lack of power with this setup...


and for the stock cen diff my mamba max 1/10 esc badly with :\ and for now I cant afford a mamba monster max .. so ill using my regular mamba max..

I run my receiver with a 6v battery pack do I can hook up a 12v fan into the 3rd channel on the receiver ? since the batt tray was used for the battery pack... it may work but at only 6v right ? ( the fan )

That is correct,fan will get 6v.

refurbished MMM sell for 100 dollars from castle.:whistle:

I received my caps today :

http://img269.imageshack.us/img269/9994/capsdra.jpg

which one end are the + & - ?

Positive is the shorter of the 2 leads,to be sure wait for someone to back up my answer.

I soldered the longer lead of the caps on the red wire on the esc and the short lead on the black wire.. it is fine ?

One side of the cap should have a stripe running down it, with - - - inside running in the same direction- that will be on the same side as the negative lead:

http://www.germes-online.com/direct/..._Capacitor.jpg

The shorter leg is usually the negative, so you should be fine.

how do I can be sure the cap work fine ?

the short side is negative....the white strip on the side of the capacitor should confirm this.

I run my MM with a HUGE cap on a 1515 1.5d on 4s in a 12lb maxx. I put a fan on it only after i knew it could run without one. Otherwise the fan is just covering up a "symptom"

ok good it is a 1200UF/35V 105C ELECTROLYLIC CAP enought dont need more right ?

I would use 2 or 3 of them (you got 3 right?) in parallel to get the maximum benefit.

The only way to tell they are working will be a reduction in the esc temps during use, should drop down 15-25*C at best. A small 25-30mm 6v fan on the esc heatsink would be good too.

im really sick of this buggy shit right now

im using a mamba max esc with bec disabled and a 1200uf 25v caps ans still overheat alot I cut a hole on the windshield of the body .. for the motor im using a medusa 36-60-2000v geared for onlu 29mph ...


motor : 167f
esc : 167f
batteries 90f

in about only 5min of runtime..

Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 50
Pinion Tooth Count: 17
Total Voltage: 14.8
Motor KV: 2000
Tire Diameter (inches): 4.3
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.006
Spur/Pinion Ratio: 2.94 : 1
Total Ratio: 12.64706 : 1
Tire Circumference (inches): 13.51 inches (343.12 mm)
Rollout: 1.07:1
Total Motor Speed: 29600 RPM
Vehicle Speed: 29.94 mph (48.09 km/h)
Effective KV Value: 2000
KT constant: 0.68 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

why people running this motor on big e-revo without any heat issue ? the buggy are not so heavy ... e-revo more weight then this ...