RC10T3, need that hot nasty speed. (8 cell NiMH)

Welcome to RCTalk

Come join other RC enthusiasts! You'll be able to discuss, share and private message with other members of our community.

Lambo Rodriguez

RC Newbie
Messages
4
Hey dudes-

I have an old school T3 I brought back from the dead.
I built a pretty legit track at my house. I'll post a video later...

I am currently doing 7cell NiMH 12t motor.
I drive this thing everyday so I got used to it pretty quick.

I want more speed. Like all Americans I firmly believe that too fast is not fast enough.
Imagine your strapped into a Saturn VI rocket resting on the launch pad and lift off starts at the same instant you crack open a luke warm Mountain-Dew Code Red while NASA controllers blast Blur over the intercom voiding all safety precautions.

^^ that's the level of speed I want.

Now I am having trouble finding a speed controller rated for 8 cell NiMH (or at least one that says that explicitly).
Ideally I want to be able to do 8 Cells and still use the 12T motor. That way I can switch back to 6 or 7 cells and still haul a$$

Is there a decent esc that can handle that for $50 or under?

I do not want to do LiPo's or brushless.
 

Lambo Rodriguez

RC Newbie
Messages
4
ooooo looks good!

One thing I've been noticing is that the cont. current limits don't seem to match up...

For instance, my esc is rated for 35A, 8,4v.
assuming my motor resistance 50mOhm (NO-LOAD), at 8.4v I should be sinking 168A. Way over the 35A limit.

I understand that when the motor is doing something the resistance will be way more plus the internal resistance of the battery and the FET's RdsON, and more.

Is there a short hand for figuring out the continuous current using the no-load SC condition?


I guess I could just assume the motor is %80 percent efficient and just have the %20 loss be attributed to the 50mOhm,
R=sqrt(.8/.2)*Rsc=100mOhm

Rt=100+50=150mOhm,
Icont.=56A

56A w/ %80 efficiency
49.7A w/ %85 efficiency
35A w/ %93.5 efficiency
 
Last edited:

AClegg

RCNT Talkaholic
Messages
399
Location
Central California
RC Driving Style
Racing
If you are sticking with the NiMH Batteries and brushed motor, I would go with an old school racing ESC. Like TNT mentioned, the Tekin 420 is a good one. Another really good one is the Tekin 411G, and 411P. The number states how many cells they will handle. For example, 411 means it will handle 4 to 11 cells. 420 means it handles 4 to 20, which was used by dragsters and people looking to dump serious power. All these units will handle just about every 540 brushed motor out there. Keep in mind, due to them being designed for racing, they do not have reverse. Just forward and brake. You can find used ones for around $40. The Hobbywing Quicrun WP 1080 will not handle the 8 cells. It only goes to 7.4v.
 

AClegg

RCNT Talkaholic
Messages
399
Location
Central California
RC Driving Style
Racing
So, daughter has a Losi XXXT. She wants to start driving it, so I decided to upgrade the ESC. To go the cheap route, I decided to keep running the brushed motor in it, but got to LiPo batteries. That's why I'm updating the ESC. On Ebay, I found Hobbywing brushed ESC's for under $20, brand new. I just ordered one. Hobbywing is known for making some pretty good ESCs, so I thought I had nothing to lose but $20. I'll keep you posted on what I find out. Give a couple weeks to get it in and abuse it a little.
 

tntpoof

RCNT Addict
Supporter
Messages
947
Location
Taylor Michigan
RC Driving Style
Bashing, Racing
ran xxxt for many years in racing . ran brushed .it was ok now when brushless hit. the xxxt was reborn .I liked the dt diff , a few rpm add ons..F a arms cow pusher..lol
 

AClegg

RCNT Talkaholic
Messages
399
Location
Central California
RC Driving Style
Racing
ran xxxt for many years in racing . ran brushed .it was ok now when brushless hit. the xxxt was reborn .I liked the dt diff , a few rpm add ons..F a arms cow pusher..lol
She wants to start racing it. I don't know how far she will go with it, but if she decides to get more involved, I'll get her a new version.
 

scottpc45

RC Newbie
Messages
2
So, daughter has a Losi XXXT. She wants to start driving it, so I decided to upgrade the ESC. To go the cheap route, I decided to keep running the brushed motor in it, but got to LiPo batteries. That's why I'm updating the ESC. On Ebay, I found Hobbywing brushed ESC's for under $20, brand new. I just ordered one. Hobbywing is known for making some pretty good ESCs, so I thought I had nothing to lose but $20. I'll keep you posted on what I find out. Give a couple weeks to get it in and abuse it a little.
Keep an eye on that Ball bearing slipper gear. My two grandsons love my Losi XXT, but I keep getting it back with the bearing melted out into outer rim of gear. Can’t find anymore of them so I’m just fInishing up locking up the rear with some rubber. I’m hoping it works because it is a screamer with a brushless setup and 11.7 volts. No wonder the kids love it, and always fixing it.
 

AClegg

RCNT Talkaholic
Messages
399
Location
Central California
RC Driving Style
Racing
Keep an eye on that Ball bearing slipper gear. My two grandsons love my Losi XXT, but I keep getting it back with the bearing melted out into outer rim of gear. Can’t find anymore of them so I’m just fInishing up locking up the rear with some rubber. I’m hoping it works because it is a screamer with a brushless setup and 11.7 volts. No wonder the kids love it, and always fixing it.
That's a lot of power going to that gearbox. I can imaging how fast that diff is spinning when they turn corners. Have you tried cranking down on the diff to lock it up?
 

Create an account or login to comment

You must be a member in order to leave a comment

Create account

Create an account on our community. It's easy!

Log in

Already have an account? Log in here.

Thread starter Similar threads Forum Replies Date
L RC10t3 Conversion Electric RC 2
V rc10t3 Electric RC 0
V RC10T3 tuning tips, Stadium Trucks 2
V RC10T3 gearing Stadium Trucks 8
scottwilson2k20 Need some help Electric RC 5
Abe559 Need some help newbie Nitro RC 0
T New to RC and need help identifying Traxxas moddl Electric RC 6
Rip King MC Need help finding a rear driveshaft for Arrma Outcast 6s Monster Trucks 3
WiseWolf Need help! Hpi rs4 mt2 / mt Need help lots of questions! Updates often! Nitro RC 7
StevenMax Needle tuning, need somebody advice. Nitro RC 34
B Need suggestions Electric RC 0
MeJay Need help deciding direction for Drag project RC Builds and Projects 5
jlobbia Need help setting up nitro heli Nitro RC 1
jlobbia Need help identifying nitro Nitro RC 9
Connor_TK.Extra Need help choosing Electric RC 5
Connor_TK.Extra Need help choosing car Electric RC 13
jlobbia Need help finding a pull start for the sc10gt Nitro RC 4
jlobbia Need help identifying associated nitro short course truck Nitro RC 3
T I’m new to rc cars and need help Nitro RC 7
hotrod9191 Need Identification Electric RC 2
CameronCodes BROKEN SERVO!!! IN NEED OF HELP!!! Electronics 12
Simonh080 Need help with my hyper 7 nitro Nitro RC 19
hoopdoggy I need help with my nitro HPI rs4 mt Stadium Trucks 34
W Changed ESC on JLB Cheetah Monster Truck 80A need to configure the controller Monster Trucks 9
N Need help finding battery Electric RC 11
Z Need help identifying this nitro engine! Engines 10
Rolex Need some phone geeks General Chaos 11
Connor_TK.Extra Need advice on which basher to buy Electric RC 15
N Hsp camper 94860 i need the factory settings Nitro RC 3
Connor_TK.Extra Need help with parts for my nitro HSP bug crush RC car Nitro RC 15
Connor_TK.Extra Need help with shredded cluch bell Nitro RC 12
W Dug out my old Nitro buggy, need help, it's been so long! Nitro RC 1
Jorrob29 Comparing apples to oranges?? Need advice! Electric RC 18
RookieNumberss Need help identifying what appears to be a bottom of a shock Suspension 5
F anyone know what this is...need parts n can't find model # Nitro RC 1
T Need help ? Buggy and Truggy 4
J Help. Need HPI motor mount 86000. Nitro RC 0
NurturantQuasar Do I need a hardened steel pinion gear? Electric RC 3
N Need help identifying this nitro car Nitro RC 5
M Need Expert Advise for electric motor Electric RC 0
drivinggun Want/Need Camera with sound to mount to my Nitro Reviews, How-to, & Guides 4
8 Need help identifying this touring car.. On-road and Rally Cars 7
Zeelott I need a hpi rs4 3 battery cover anyone have one for sale? Nitro RC 5
Budgiedove I need a new transmitter but need advice please? Reviews, How-to, & Guides 4
Berto Blitzer Beetle, need motor and esc advice please Electric RC 5
C New here need a little help identifying Electric RC 1
O Need a battery for ECX Ruckus 2WD Electric RC 4
R NEED A QUIET TAIL PIPE/ EXHAUST Large Scale RC 8
Spencerman74 Need help identifying these planes and how much their worth. Nitro RC 2
E Need help with a Kyosho GS11X Engines 4
Similar threads


















































Top