Quote:
Originally Posted by mk351e
a little more info is in order I think:
1st - and this may be odd, but the battery is always dead last to get hot; in fact, it normally doesn't. It's usually, MMM, Neu, then battery gets hot. My MMM fan seems to be on almost all the time, but castle says it's ok. As for the motor selection, here's some interesting info: a VERY trusted source told me that this setup would be ideal, as Neu motors love to spin, and running mine at nearly 50k is a non issue. While they're rated to go to 60k, they can typically function up to about 100k(!). I just wanted to add a little fuel to my pending lipo fire here 
Also, I didn't make my point right; i certainly notice a difference in performance between my 2 pinions: the 18T obviously has more top end, but it also seems to pull wheelies easier!  What I meant was that there isn't much difference in temps between the 2 pinions.
Does this change anything? And does anyone know where I can get tires that can stand this horribly painful abuse?  |
If your VERY trusted source suggests that this setp would be ideal, then i would suggest that a reconsideration of the level of trust you give this person be adjusted a bit(no offense or disrespect to your source, but your setup is NOT ideal IMO - your temps tell the story, don't they?). The fact is, the 1515/1y motor will operate fine on 6s, but I wouldn't do it myself - your results are about what I would expect. Does it work - sure - but it ISN'T ideal IMO opinion (perhaps I am also a trusted source?). I could get 60mph out of a nitro motor, too - just lean it way out! I wouldn't expect it to last long or run cool, though. The 1515/1y is great on 4s and 5s for sure. On 6s, it is amp-hungry. When you run things on the extreme side, you can expect exactly what you are experiencing. :)
The 18t pinion calculates to around 90mph! - this simply isn't realistic and should not be recommended for anything besides a speed run - and even this is pushing it. To put things into perspective, I run a 1515/2.5d motor on 5s in my race truck(yes, a slower motor with lower voltage). This is on the mild side, but it will still outperform the nitros at the track pretty easily. Perhaps of interest to you is the fact that I can run this setup INDEFINATELY without heat buildup on the race track. As long as I have batteries to feed it, it won't overheat.
I would heed the advice already given here - reduce your input voltage or your gearing to reduce your heat. Just trying to help you get maximum enjoyment from the hobby. It sounds like you are having a blast with the sick setup you have, but you may not notice much of a performance decrease when making the suggested adjustments - but you will almost certainly be allowed to enjoy it for longer periods of time without fear of overheating. :)