New Tekin RX8 1/8 scale brushless ESC

[Gary NJ]

I have been very pleased with my Tekin system in the two weeks I have run it in my D8E. 1700 buggy, now geared 17/40 with 10/43 diffs, running 2 2S 4000 35C hardpacks in series. I used 1900 mah in a 10 minute qualifier yesterday - about 11 minutes of actual run time, or about 175 mah/minute while geared 16/40, so I went up a tooth for the main. I haven't recharged after the 15 main, but I ran the whole race, and then let another guy try it for 3-4 minutes afterwords and never hit the LVC. ESC was at two LEDS with both the 16 and 17T pinions, and the motor was at 135 with the 16T after 10 minutes, and at 145 with the 17T after 15 minutes. The batteries temped at less than 100 degress, though they are hardcase so its hard to tell. I'm guessing I'm still under 200 mah/min at 17T. I couldn't be more pleased with the system in terms of smoothness and performance so far. I do want to play around now a bit with the Hotwire at the track and try different timing, throttle curves and current limiting.

[Randy_Pike]

Jake: The arcing is normal on the RX8 and other esc's due to the caps getting charged up while the battery is being connected. There are 3 caps on the RX8 so it's a bit more noticeable.

Nothing lighting up is odd for sure. Have you tried doing a factory reset? Do you have a hotwire to plug it into?

Serge: Your setup gearing wise seems ok for a medium to large track. How much timing are you running? I've found that the higher the voltage the lower the timing I need and often use.

[JodyJ]

Anyone know where else I can purchase the replacement fans that are in stock?

Thanks,

Jody J.

[Bubonic-X]

[quote=Randy_Pike;6030436]Jake: The arcing is normal on the RX8 and other esc's due to the caps getting charged up while the battery is being connected. There are 3 caps on the RX8 so it's a bit more noticeable.

Nothing lighting up is odd for sure. Have you tried doing a factory reset? Do you have a hotwire to plug it into?

yea I figured the arching is normal but whats odd is now that it does not turn on there is no arching. Ill try the hotwire my friend has one but how will it work if ESC does not turn on?

[Randy_Pike]

The Hotwire doesn't need the unit to be powered up. IT supplies power through the USB cable.

I'm wanting to see if you get a response from the unit.

[Sergel]

Originally Posted by Randy_Pike

Jake: The arcing is normal on the RX8 and other esc's due to the caps getting charged up while the battery is being connected. There are 3 caps on the RX8 so it's a bit more noticeable.

Nothing lighting up is odd for sure. Have you tried doing a factory reset? Do you have a hotwire to plug it into?

Serge: Your setup gearing wise seems ok for a medium to large track. How much timing are you running? I've found that the higher the voltage the lower the timing I need and often use.

Randy, timing set to 10. What about the fan issue ?

[nwilcox88]

Originally Posted by JodyJ

Anyone know where else I can purchase the replacement fans that are in stock?

Thanks,

Jody J.

http://www.colordrives.com/evercool-...---3-pin-.html

The 30x30x7 fans are common fans. You may be able to find them cheaper than this one. The 30x30x7 fans are used on computer stuff as well so check them as well. (like the one above)

[Bubonic-X]

Originally Posted by Randy_Pike

The Hotwire doesn't need the unit to be powered up. IT supplies power through the USB cable.

I'm wanting to see if you get a response from the unit.

Ok ill keep you updated

Jake

[Randy_Pike]

Originally Posted by Sergel

Randy, timing set to 10. What about the fan issue ?

Unplug your RX8 from the receiver and power it up. Does the fan spin? It should spin full on all the time.

[EVILGRAFX]

Originally Posted by nwilcox88

http://www.colordrives.com/evercool-...---3-pin-.html

The 30x30x7 fans are common fans. You may be able to find them cheaper than this one. The 30x30x7 fans are used on computer stuff as well so check them as well. (like the one above)

what do you do with the third wire?

[ta_man]

Originally Posted by EVILGRAFX

what do you do with the third wire?

Cut it off so it doesn't get caught on the gears and stuff.

[Sleepytime]

Randy you are a huge asset to Tekin and i hope they take good care of you, i had a couple days i could of still returned my Rx8 and motor but because of your efforts i am happily keeping it and eagerly awaiting the updated rotor to get it back on the track.

11:30pm on a Sunday and he was still taking care of Emails and stuff, Tekin is lucky to have you and i hope they know it

[X God]

I'll be running my new RC8e at the Futaba race at St.Louis Dirtburners club(site of the ROAR nat's a few years ago) It's a big track and was wondering if I'll be able to make a 15 minute main. I'm running a Tekin R8 with a 2050 T8 motor and 2 Reedy 5000mah 35c 7.4 packs geared 46/16 timing at 0. Any opinions and or suggestions would be welcome. Thanks

[plack75]

I just want to thank Ty and Tekin for their quick response and fast arrival of my new rotor... Thanks guys... the 2050 is a rocket

Originally Posted by Bubonic-X

Randy

Just installed everything, I have not even put car on ground. Motor and ESC all worked and was in process of doing quick tune settings. I have a helios with spektrum and a 5s pack. Car was on and was reading manual and the transmitters alert came on when it gets no input for a certain amount of time ie throttle or steering reminding you to turn transmitter off if you forget.

I blipped the the throttle to get the alarm to stop beeping and everything shutoff while the switch was still in the on position. Waited a hour to make sure it was not a thermal issue. Tried it again and nothing.... All connectors checked out and even replaced the Rx. Still nothing no lights no chimes nothing. The batt is showing voltage and charges.

I dont know if this means anything but when you plug this battery in the deans connectors to the ESC it arcs a little. Which to me is normal due to the current these packs can produce. Now when I plug the batt into the ESC no arching occurs.

Any ideas anything I should try before I send it in?

Jake

Hi, this is for you and Randy
I'm French then I hope you will understand because of my poor English...
I have an other theory about why some Esc died !
I have order a RX8, but before I used a Xcelorin and it happens with this ESC...
With the best transmitters, and HRS, ... , we can use some different options like the one you are talking about. My story is nearly the same. I have a Futaba radio, then when I have tried my ESC all was ok during about 5 runs.
One day I have tried to set the Failsafe function on the throttle trigger, in brake position, in case of I loose the signal. I have made this without the motor wires connected. I have checked if my esc has the red led lighting when I switch off the transmitter. And it was ok. I have connected my motor wires to my ESC, and when I have switched on it, it has smoked and the motor has attempted to rotate but in funny way, like he would like to rotate but something is here to stop it !
I hope you will understand what I'm talking about.
Because I use drag brake, I think there is a possible firmware conflict with the Futaba Failsafe. If the failsafe is set up on my transmitter to "full brake" :

- when I will turn on the transmitter then the ESC, this will be ok ...
- but if I turn on the ESC before or if I switch off the transmitter with ESC switched on, my ESC will give the order to the motor to "stay" because of the drag brake, and at the same time my receiver give an order at the ESC, to "brake" ( full brake ) like I have preset with my transmitter....
I think there are like this one many other ways to kill an ESC, because of some possible software or fimrware conflicts, but manufacturers as Losi, Tekin, ...can't test their firmware with all the existing Transmitters/receivers...
Do you think this will be possible ? What's about transmitters failsafe function when using a RX8 ?