Efficiency question

[C-5Quad]

Ok I have a 3905 maxx and want 40mph lots of torque but cool temps even under constant throttle spikes and wide open running. But with the best efficiency possible. I have the MMM 2200 combo now but am looking at a 1520 or 1518 for my 6s needs.

I just want to know what my best option is for power and runtime with 6s 5000 45c cells

Well I am not going to get too technical but my 1518 is a great motor in my Revo. Feels a little lethargic on 4S but wales right up on 6S. I would hate to see what it does on 8S on which it should be capable of running. If you gear it for 40mph on 6S I think it will run very cool indeed. My Revo is geared for 62mph on 6S and even then the 1518 doesn't get all that warm really.

[TexasSP]

For 40 mph on 6s the 2200 is a great motor. Really no need to look at the 1518 unless you have a really heavy maxx. I had mine geared with a 2200 at 50 and it ran cool all day long.

[C-5Quad]

I currently have mine at 18/68 that comes out to 43.49 mph in the speed calc....and the performance is ok but not impressive for 6s in my opinion. The motor also gets hotter then I like.....I ordered a castle blower and am going to go over my settings on my esc once I get the software loaded on my new pc. gotta check castles website as i misplaced my cd

[SunnyHouTX]

I've got my E-Maxx geared 17/68 on the Castle 1518-1800Kv motor and get at least 45 minutes run time on 6S 40C/80C 5000mAH packs. ESC fan almost never comes on and motor is just over 110F.

[TexasSP]

Originally Posted by C-5Quad

I currently have mine at 18/68 that comes out to 43.49 mph in the speed calc....and the performance is ok but not impressive for 6s in my opinion. The motor also gets hotter then I like.....I ordered a castle blower and am going to go over my settings on my esc once I get the software loaded on my new pc. gotta check castles website as i misplaced my cd

Have you checked for binding in the drive train? This is an often overlooked item.

Second, are you using a temp gun or your finger? A temp gun is the correct way, your finger is not. Temp guns can be hand for less than 30 dollars which is a small amount of insurance on a 600 dollar plus truck.

Originally Posted by SunnyHouTX

I've got my E-Maxx geared 17/68 on the Castle 1518-1800Kv motor and get at least 45 minutes run time on 6S 40C/80C 5000mAH packs. ESC fan almost never comes on and motor is just over 110F.

Is that the same one you bought from that really cool bald guy?

[SunnyHouTX]

Yes sir

[C-5Quad]

I use a temp gun being a quadriplegic I can't judge hot/cold with my fingers any more. I'll have my LHS check my drive train...when I push my truck the gears are loud in the tranny. nothing is binding but I haven't run the truck in a while. just waiting on my nano-teck 3s 5000 45/90c lipos. as the zippys were getting spoungy after a hard session. I hooked up the mmm to my pc and found my punch was turned way down to 20% and medium start power so i set it to 80% and high this should fix my problem...



Wow i'm impressed you get 45 minutes from 5000 mah pack

I never got more then 20 but I run a lot of full throttle wich is why my temps are higher and run time shorter..........if the blower doesnt help ill pop in a 1518 or gear down some...actually ill order a 16 or 15t now and just gear down as well

[lincpimp]

For 6s I woulod say the 1518 would be a good choice. I did run the 1515 2200kv motor in a lst on 5s and it did very well. But if you plan to do alot of stop and start bashing a lower kv motor that has more torque will be the way to go. I did prefer the neu 1521 1y on 6s in the lst vs the cc 2200kv motor on 5s.

I have a 1520 but have yet to use it. Also have another 1521 neu so I plan to see if one is better than the other.

[SunnyHouTX]

Originally Posted by C-5Quad

Wow i'm impressed you get 45 minutes from 5000 mah pack

I never got more then 20 but I run a lot of full throttle wich is why my temps are higher and run time shorter..........if the blower doesnt help ill pop in a 1518 or gear down some...actually ill order a 16 or 15t now and just gear down as well

Yup. I've got mine geared for about 30mph and that's enough for me for now. I will go up a tooth or two on the pinion when I go to the soccer fields but for the space I have now in my apartment parking lot 30mph is enough. And yes, I do go full throttle a lot.

You might have to go to a smaller pinion on the 2200Kv motor if you plan on using it with 6S, or, like linc said, drop the 1518 in. The 2200Kv is more of a 4S - 5S motor in the E-Maxx.

[C-5Quad]

Originally Posted by lincpimp

For 6s I woulod say the 1518 would be a good choice. I did run the 1515 2200kv motor in a lst on 5s and it did very well. But if you plan to do alot of stop and start bashing a lower kv motor that has more torque will be the way to go. I did prefer the neu 1521 1y on 6s in the lst vs the cc 2200kv motor on 5s.

I have a 1520 but have yet to use it. Also have another 1521 neu so I plan to see if one is better than the other.

so far the 1518 search has limmited results being people paid 65 and want 120+ wich is out of my range now that I invested in new lipo's

let me know when your 1520 gets cold n lonely and needs a new home

she's fairly stock just rdl bulks, trx center drives, amcnc towers, trx big bore shocks, and shinny cvd's when my plastic's snap.

[TexasSP]

Just curious but what type of temps are you seeing?