New Jammin crt .5 motor question

Hey I got a Jammin crt .5 pro on the way and I want to use my mamba max and 2s Orion lipos in it. I plan to keep it stock and use the monster mount with a home made battery box. I want to use a 5mm shaft motor so I can use the pinions I have and I really like the 36-60-2000 motor in 4s buggy.

Would a Medusa 36-50-4300 motor be good with this battery speedo combination? Please advise

[BrianG]

It should be pretty good as long as you're geared for around 25-30mph. If you want faster speeds, I'd go with 3s and the 3300 (or thereabouts) motor.

[GO-RIDE.com]

I assume you mean the 36-50-4800. I run a Novak 1/10 6.5 (6400kv) on 2S and it runs great geared 46/12 and 4" 2.2 truck tires. When it's cool or I use 3.5" 2.2 buggy tires I can run it 46/13 no problem. As beefy as the Medusa motors are compared to my super light Novak I think you will be able to gear it to at least 40 with no problems. I think a 15T would be a good place to start, or a 14T if you don't need that much speed.

[Arct1k]

I've run the 36-50-3300 on 2, 3 & 4s and it runs great...

yes I do mean the 36-50-4800 on 2s

[E-Revonut]

I'm running the Medusa 36-50-4800-5mm on 2s and love it. Gearing for mid-upper 30's it handles it without a problem. I use a 15t ( for some reason on other posts I beleive I may have been saying 19t but it's a 15) with stock tires and I have an 11t I use for running some bigger slash tires. I'm running MA 6000mah 2s packs and get 20-25 minutes of mostly full speed runs. After the first pack I do need to let it cool a little, motor is fine at 125* but esc gets a bit warmer, around 170* after a long hard run. I'm running a MM with no mods, no fan, and using the internal BEC.

[GO-RIDE.com]

I'm a bit surprised that your MM is heating up with just a 15T on stock buggy tires. The rule of thumb is (Hot ESC and Batteries + Cool motor = Overgeared). How's your battery temp?

I run my E-CRT.5 with Novak GTB & 6.5 setup at our local indoor track and my buds large back yard track. I definitely pull a good bit of throttle throughout the track, but not the same as WOT speed runs. Mine can get hot when it's over 90 degrees outside and I run the 2.2 truck tires with the 13T pinion, but otherwise it runs great. I'm certain I don't have nearly the torque that the Medusa has, so I'd expect the Medusa to pull that 15T easily.

[E-Revonut]

Must remember that I'm using no external bec which doesn't help with the heat. Batteries are between 110-115* I have minimal cooling holes in the body also. Those temps where when I was running the 11t with slash tires and going through a lot of grass, big load on the esc. When running blacktop everything is plenty cool with either tire, I haven't checked actual temps because nothing felt overly warm. I only check temps if I can't grab ahold of it and hold it, and I'm not talking the rule of if you can touch it for more than a couple seconds, I mean actually hold it and not bother me at all! Thats mostly due to 11 years of working in kitchens, I can grab things that would burn most people.

[BrianG]

On 2s, using the MM's BEC doesn't matter. The difference in voltage (7.4v vs 6v) is low enough that there is little heat at the current the servo is pulling, especially on a small truck. Actually, UBEC can be LESS efficient on 2s because of the low voltage differential. Anything higher than 2s though, and the switching BEC have a clear advantage.