3LikesTekin RX8 1/8 Scale Brushless ESC Thread
07-08-2009, 04:39 AM
#2896
Here is a "Run Time " update. I raced the club race last night at Dirt Burners. Entered the Sportsman 1/8 class because it was my first time there. Qualified 2nd(5min qualifiers) and won the main(15 minutes)with a lap on the field. I had power left but not much. I had the timing set at +15 geared 46/16 with a 2050 and 2x Reedy 5000 packs. I was as fast if not faster then the sportsman drivers but no where as fast as the pro class there.If I spent the $$ would a 5 or 6 s pack give me more speed and run time with the same motor ???
07-08-2009, 04:53 AM
#2897
Tech Master
iTrader: (3)
Thanks for the advice Jube, My main concern about gearing up is run time. I had my EPA turned down 15% and could still clear all the monster jumps easily but it just seemed slow on the straight. 15 minute mains seem to be the norm here in St.Louis.
Last edited by X God; 07-08-2009 at 05:43 AM.
07-08-2009, 04:58 AM
#2898
With the BL motors you need to put a certain amount of load on them to get the best efficiency out of them. By being geared as low as you are and with your epa backed down, you arent loading the motor much. We have actually seen an increase in run times by gearing up to around the 18t area. I think you will find most guys run in the high teens with the rc8.
07-08-2009, 05:38 AM
#2901
I run a Losi with the 2050.... small track 45/14 profile 2 if there is good grip and profile 1 if its slick. Breaks at %50 motor timeing at 0..... with a 4cell zippy 5000 and get 20 min.Good luck! If you want top speed stick with the 45/15 and turn your EPA's all the way up on the throttle!
07-08-2009, 05:48 AM
#2902
Like Glenn said turn your epa back up if you dont have the top speed you are wanting. Temps are awesome btw. I've also found that I can lower my temps, to an extent, by gearing up. 2 weeks ago I went up one tooth and dropped 20 degs in a qual. and put less mah back in.
07-08-2009, 08:33 AM
#2903
tekin motors
Hey guys, thanks for all of the help, I was wondering if all of the tekin motors are having this rotor problem. The reason I ask this is because i ordered another motor to have for a upcoming race this weekend. I ordered a 1900kv and i am debating buying a castle 2200kv, but it is a sensorless motor. I know that the rx8 can run both, i liked the smoothness of my 2050,but to be honest i am worried about getting another tekin until mine is fixed and knowing the problems with the rotors are fixed. I would hate to go all the way out to this race and only get a few runs in before the rotor blew like my last one. Keep in mind I am not bashing the product, i think it is an awesome system and cant wait to get my new rotor so that i can run my 2050 again because before the motor let go it was great.
07-08-2009, 08:45 AM
#2904
My sensor wire came unplugged in my buggy at the last race and I didnt even notice in the way it drove. Somone pointed it out to me and I plugged it back in again. It was still very smooth running without the sensors so I wouldnt worry if you want to run a sensorless motor with the RX8.
07-08-2009, 09:10 AM
#2905
My sensor wire came unplugged in my buggy at the last race and I didnt even notice in the way it drove. Somone pointed it out to me and I plugged it back in again. It was still very smooth running without the sensors so I wouldnt worry if you want to run a sensorless motor with the RX8.
07-08-2009, 09:33 AM
#2906
My sensor wire came unplugged in my buggy at the last race and I didnt even notice in the way it drove. Somone pointed it out to me and I plugged it back in again. It was still very smooth running without the sensors so I wouldnt worry if you want to run a sensorless motor with the RX8.
07-08-2009, 10:01 AM
#2908
I tried running my Medusa motor on my RX8 and it works great! Startup is the best I have seen with any sensorless controller. It will even crawl fairly well for a sensorless setup. I don't have good data but it seems that the medusa ran cooler on the RX8 that it did on the MM even though the timing should be within a degree of the same. I would have no issues with the sensor wire coming off during a race. I really don't think it would make a difference unless you were stuck up against the pipes nose first in which case you deserve to wait for the martial to come get you. 
07-08-2009, 01:06 PM
#2910
I have tried it, but they are a bit heavy for the power (5S2P). Fast charging is a nice feature (up to 15C I believe). They may be practical for 5 to 8 minute races, maybe even 10, but they don't have what it takes to do 15 and still be a reasonable size.