BL Motor Questions

[ajdragon]

Hi

Ok I'll stay away from that one then,

I found this web page about RC Brushless Motor Chart it looks like good info for beginners.

 

[crazyaust]

That motor will make it fast. I currently have that same motor in my 2WD Slash, and, on 2S, that truck does between 45 and 50, depending on the surface. You said you wanted something that wouldnt make it extremely fast on 2S, so, for a cheap option, this would be a better choice: https://www.amazon.com/GoolRC-3500KV-Waterproof-Brushless-HuanQi/dp/B07BFB1KJ3/ref=sr_1_2?crid=63S2UYUJCIZJ&keywords=3650+3500KV&qid=1686453539&sprefix=3650+3500kv,aps,107&sr=8-2 and this one would be a bit faster, but, would be under the 40MPH mark: https://www.amazon.com/Faceuer-Professional-Brushless-Exquisite-Workmanship/dp/B08YK7FP3W/ref=sr_1_2?crid=2OGPILXE8ARZQ&keywords=3900kv+brushless+motor&qid=1686453637&sprefix=3900kv+brushless+motor,aps,100&sr=8-2 One thing to watch for with those cheapo motors is the motor shaft size. Most are 3MM, which is what most pinions are, but, some are 5MM, which can make it hard to find 48P pinions. A simple rule of thumb that i learned to follow for motors on 2S, if you want fast (between 45 and 60MPH), stay between 4000KV and 5000KV, and, if you want a bit slower (between 25 and 40MPH), stay between 3000 and 4000KV, that way, you can gear it more for the speed you are looking for, without overheating the motor. For example, the one you linked, i have in my 2WD Slash, geared at 19/86, and it will easily do 50MPH on asphalt, and around 45 on dirt. I have the 3900KV i linked in a DR10, and, on 2S that car will easily do 45MPH on asphalt, with 17/81 gearing. The 3500KV i linked, i have in a Traxxas Bandit, with 17/86 gearing, and it easily does 40MPH on dirt, as long as the tires get grip. On asphalt, it will do 42MPH all day. Oddly, a 3300KV, in my Arrma Fury, with 17/87 gearing will do just about 2MPH slower than the Bandit, but, with a 3100KV motor, will only do around 28MPH. Now, on all of mine, I'm running either the 10BL120 ESC, or the Reedy 120A ESC, except for on my DR10 and ProSC10, which are running 60A Reedy ESC's, and, with the same KV motor, and similar gearing, i get pretty much the same speed no matter the vehicle, give or take a couple MPH.

Your Raider should have the BLX85 motor in it, which is 3600KV. I have that same motor in my restored Raider XL: https://www.arrmaforum.com/threads/raider-xl-blx-restoration-rebuild.61676/ and, on 2S, it will do just under 40MPH, but, on 3S, will do over 50MPH, which is why, for your RC10GT, i would stick with a 3300 or 3500, or 3900 at maximum. The 3300KV would give you roughly the same speed as the Raider, maybe a little less, and, anything over that is just going to make it faster.

Hello I’m having trouble finding the best gearing for my 2wd slash on 3700kv 3660 quicrun combo. I’ve tried a few different combos. the most fun I’ve tried yet, was 22/86 but it got hot after a full 30 min run didn’t wheelie tho and only looked about 30-37 mph on 2 cell. looking for some straight up fun wheelies, speed and temps on 2s and can be able to run 3s on same gearing for a bit more speed I have 14,17-22 pinions and 76/86/90 spur for it, what would you recommend? I saw ur post of you running 17/86 I was gonna give that a go today. (After trying it it only gave me about 30 mph idk how ur getting 42mph although ur 200kv more than my setup.) ordered a few more pair of pinions and did a ton of math and I’m gonna try out a few more combos but still need help
I tried 22/76 today I really liked that got toasty but I don’t have a infrared gun to actually see how hot it is but I can hold my finger on it for a good 5 seconds before it’s too hot