Talion motor upgrade. Turnigy motors

leo248

Premium Member!
Premium Member
Messages
128
Reaction score
45
Location
UK
Arrma RC's
Talion
I would like some opinions/advice from anyone who has changed the motor to a lower kv in an arrma 1/8.

I currently have a turnigy xk4074 2000 kv motor.

Running 17/50 gearing on 4S it's right up to the limit in terms of temperature at about 65-75c (149-167f) on 4S but on 6S it goes above 90c (200f). I'm concerned this is too hot and I might end up destroying the motor again like I did with a hobbywing 2200kv (the rotor magnets shattered).

I have bought a turnigy xk3674 1650kv in the hope that a lower kv will lower temperature. However since the motor is narrower and is easier to turn I have doubts on this.

Can anyone share experience or recommend a motor that will run cooler than my 2000kv?

I don't want to gear down because I want decent speed. Looking for just under 40mph on 4S and 55+ on 6S.

Thanks.
 

Attachments

bicketybam

BickeringBam - YouTube Mega Star!
Premium Member
ArrmaForum Fan
Excellence Award
Build Thread Contributor
Messages
8,516
Reaction score
10,966
Location
New Milford, CT
Arrma RC's
BigRock 4x4, Granite, Infraction, Kraton 6s, Kraton 4s, Notorious, Talion, Typhon 6s
None of those motors are going to run cool on 6s. The first one is basically the same as the stock BLX185 which gets toasty on the speed pinions. I think the 2nd one will be worse. I just picked up a Hobbystar 4092 1730Kv motor from RC Juice. This is a pretty popular motor and won't overheat unless you go big pinion. Rich Duperbash runs a 20t in his Kraton. I run a 19t in mine and it's fast.
 

leo248

Premium Member!
Premium Member
Messages
128
Reaction score
45
Location
UK
Arrma RC's
Talion
None of those motors are going to run cool on 6s. The first one is basically the same as the stock BLX185 which gets toasty on the speed pinions. I think the 2nd one will be worse. I just picked up a Hobbystar 4092 1730Kv motor from RC Juice. This is a pretty popular motor and won't overheat unless you go big pinion. Rich Duperbash runs a 20t in his Kraton. I run a 19t in mine and it's fast.
Only problem is that cost of buying a hobbystar motor from the US. It would cost about £90-£100!
 

Primarrma

Premium Member!
Premium Member
ArrmaForum Fan
Messages
1,036
Reaction score
1,109
Location
Australia
Arrma RC's
Kraton 6s, Talion, Typhon 6s
I run a hobbystar 4092 but the 1480kv and it gets toasty on a 19t, I am surprised at the lack of speed on 4s and that it gets warm easily on 6s with this gearing. I will drop down to a 16t or 17t after this weekend, I want to do a speed test on 8s.
 
Top