Opinions on my 8ight-T 1.0 Brushless MMM 2650kv

[lordzeke]

I'm running a 8ight T 1.0 with a Mamba Monster 2650kv brushless setup using 45/15 gearing and a Reedy 4s 5000mah 50c http://67.199.85.166/main/productdetails.php?text=720 battery. Before that I was using a 1700kv with the same gearing but that motor might have died, still trying to figure that one out.

What I gathered from what I've been reading from various forums is that with my current setup I should be running a smaller pinion like a 13/12t. Please correct me if I'm wrong, still new to this.

I'd like to get people's opinions on my setup, is that a couple of times I used another battery that I previously used with the 1700kv motor and that's a 5s 4000mah 25c battery. Should I not be using that battery for with the 2650kv motor? Can I do some damage? I mean it's 18.5v vs 14.8v with 4s batteries. Do I Have to switch to 3s batteries or should I? I mostly drive with the Reedy battery and I have the motor set to 50% power, light acceleration, 10% drag, low motor timing and with the lvc enabled of course. I'm using 10000wt in my center diff, it's a Losi heavy duty one, but not the smart diff, not stock either.

Not sure if the way I drive makes a difference but I mainly do very light bashing at the park on the grass with my little skate board ramp. But mostly at an outdoor medium size track where the conditions are a little loose and a little indoor 10 scale track with hard packed dirt. Eventually I would like to do some light racing if I could get a good setup. I'm not trying to brake sound barrier, I just wanted to get good all around, usable, reliable power. So I wanna work with that in the gearing and batteries.

I open to suggestions, if anyone would like to chime in. I appreciate anyone's input.
Here's a few snaps of it currently.
http://img.photobucket.com/albums/v299/lordzeke/IMG_0949.jpg
http://img.photobucket.com/albums/v299/lordzeke/IMG_0983.jpg

[Losi-Academy-University]

Running a 5s or 6s will actually reduce stress on you brushless system. It will run cooler and your runtimes will be longer also. If your system is running hot, gear down a tooth or two on your pinion.

[lordzeke]

Running a 5s or 6s will actually reduce stress on you brushless system. It will run cooler and your runtimes will be longer also. If your system is running hot, gear down a tooth or two on your pinion.

Thanks for your input.
I'm not arguing against your answer or anything but I posted these question on a few different forums. One person replied that I should run the 5s or else I would risk overheating. Another person on that same thread said I shouldn't run the 2650kv and that I should go back down to 2200 or 1700kv. I still need to see if my Xcelorin 1700kv motor is still working, but right now all I have for the truck is the 2650kv motor.

But if I continue to run this motor I gathered that I should bump down to a 12/13t pinion and up to a 47/48t spur setup. Not sure how hot it runs, but I'll start temp checking it now.

[JMW]

Sweet setup - just remember "motor kv rating X voltage = max rpm"
So with a higher kv motor you should gear it down (ie less pinion more spur)
And with a higher voltage OR lower kv motor comes more torque so you can gear it up :confused:
Not sure if anyone has cooked a MMM esc yet ???

You need to find that balance :D

[lordzeke]

Thanks for the tips JMW.
I ended up putting a 12t pinion gear on yesterday and tried it out at OCRC Raceway. The throttle seemed more snappy and the truck accelerated easier. It's certainly an improvement. I picked up a 10t as well but didn't have enough track time to try it out. But from the difference I can see from 15t to 12t, I bet the 10t would be more suited for shorter courses, while the 12t would be better suited for medium courses like Rev Raceway.

[lordzeke]

Still trying it with the 12t, but I haven't reach over 125 deg yet. On the local 10 scale indoor track I was right around 123 consistently.
At home after doing several speed runs I was getting 106. The real test will be to see how hot it get's on the 8 scale track. The ESC hasn't exceed 140deg yet because I've yet to see the Mamba Esc's fan kick on.

[JMW]

Awesome :cool:
You are right about pinion sizes = smaller pinion for smaller / tighter tracks and larger pinion for larger / faster tracks :p
That reedy battery you are running is pretty much the optimum for that motor hence the low temps :D
Just remember for every track - you want to max out revs down the straight just before braking - so adjust gearing to suit ;)

[lordzeke]

Horizon replaced my ESC with a new one. So I ended up going back that and 1700kv Xcelorin motor. With my 47t spur and 16t pinion it seems like a good place to start. Need to get it back on the track at Rev and see how it goes and gear from there. I'll be running 4s/5s, let's just hope this ESC holds up. I've already had 2 that died on me in less than a week.

So I put the MM ESC / CC 2650kv combo in an OFNA Hyper 9e and that thing is awesome. Now I just need to get a 3s and I'll be set.