Tekin RX8 first impression

[starscream]

Why buy the combo if you don't need/want the motor?

[e-mike]

Originally Posted by starscream

Why buy the combo if you don't need/want the motor?

for me this is what i wanted to do ...but im happy to have choice the combo....smooth motor run a little hoter VS the castle neu or real neu....in sensorless mode the motor(neu 1515 1y) make an audible pulse at startup but seriously i couldn't tell if i run a mmm or rx8 in sensorless modewhit the rx8...

[snellemin]

Originally Posted by starscream

Why buy the combo if you don't need/want the motor?

My plan was to stick the 1550 motor in a GS truggy. But plans have changed.

[XXXDAD]

Originally Posted by starscream

Why buy the combo if you don't need/want the motor?

So he can sell it to me!

[snellemin]

Used the current limiter last nite and worked pretty good. I didn't blow the rear diff in a instant, as I did with the limiter disabled.

[tom255]

I am not impressed with my tekin system at all!
First my motor failed Magnets came loose from shaft on race. Looks Like Tekin have issues with their motors.
Total run about 30-35min.
Track was big and fast, lots of fast passes with full throttle. System didn last 10min at all on 4S 5Ah battery. I reduced gearing and configured current limiter on 11' and got 9min runtime only before fail.
I didnt had temp issues but something wrong (Maybe timing too high or something)
On MMM similar system with CC2200 motor it finished 10min mains. (No punch control/Timing 0'/Low Start Power). MMM felt more aggressive over Tekin.Only advantage Tekin was smooth in every position.
I dont know maybe my neutral impression becouse motor failed? I dont know...
I send e-mail to tekin support but no response yet.

[e-mike]

dont worry tom255.. tekin is in the way to resolve this issue about rotor failing,,,and they are very good in customer service...im in canada and my friend had the same issue,,,,tekin sending him a brand new rotor for free..

[Snipin_Willy]

I think I saw this same issue at a race here in Oklahoma yesterday. The give away was that the rotor spun like it was riding on nothing but the bearings with no magnetic field.

[snellemin]

Bummer about the motor. I still haven't used my motor yet.

[XXXDAD]

The rotor can be repaired with Locktite( the one for bonding cylinders ) or JB weld product..... get the replacement from Tekin ( you will have to send a pic of the bad one) and check the RCTECH forum on the RX8 there you will see the process on glueing yours as a back-up. If in a bind( at the track on raceday) i'd use JBweld it cures in 5 min. you could use it right away. I run the RX8 2050 and have gotten 15 min with my 5000 25c 4 cell zippy Losi 2.0 15/45 gearing. Good luck and don't give up Tekin is #1 with service.
Just call they will pick up, sometimes e-mail takes a lil longer.

[tom255]

Rotor magnets demanetized, I didnt understand what wrong in first minutes, car behaved strangely, first it didnt had punchl, but ater it gets better-I tought that I put empty battery by mistake... and on fast passes I pressed full trottle and understood that something realy wrong I took car to pit stop and saw that shaft came out. But it was late, rotor lost magnet field. If you look shaft you will see dark areas, so you can imagine what temperature was there

Unfortunatly I am located In Europe. Its not just that easy that just call. My english is not perfect, but if they not answer to email then I dont have other choise :).

[XXXDAD]

Tom, Glue it. Clean the shaft and glue it together. Go to your automotive shop and get a glue that can withstand heat. Clean the shaft and glue it up.Let it dry 24 hours and your good to go. Try this:
http://www.permatex.com/products/Aut...e_Retainer.htm

[e-mike]

update...i run my combo for about 10hours and nothing else to say that amazing!!!! startup is smooth! brake is very linear...but the motor run hot(140f)..why??? my 2200neu castle run 20f lower than my 1700kv geared for the same speed (40mph)same lipo same outside temp...(68f)and same runtime....


my esc setting

brake:100%
reverse:40%
no drag brake
timing lowest
current limiter:30%

ive used the same setting for the 2200kv

[brushlessboy16]

seems like your undergeared.

[snellemin]

Took out the 6L Hacker and swapped in the Pletty Maxx. Geared 51/17 on 6s A123 and it's a beast still. The RX8 still keeps going and the fan gets a good workout.
Peak power is a bit less then with the Hacker, but I sure didn't seem like it running up and down the street. I'll get a bigger pinion soon and stess the ESC some more.