Dimsum 0 Posted March 2, 2012 I have some very nooby motor / ESC questions that I am hoping to get a good answer for here, as I can't find any good answers through Google searches. And if asking questions involving non-Tamiya products are frowned upon, I apologize, but I am struggling here lol. So this is my situation - I want to get as much waterproof electronics in my trucks as possible. I have Traxxas 2075 servos on the way, as well as Traxxas XL 2.5 ESC's, which I ordered without checking first to see if I could run with Tamiya's Sport Tuned 540 motor (DOH!). From what I understand, the Traxxas WP ESC cannot be run with the 540 motor due to the 15t limit on the ESC? Here are the specs from the TRX XL 2.5 ESC : Motors: Brushed Motor Limit: 10-turn (380 size) BEC Voltage: 6.0 Volts DC Transistor Type: MOSFET On-Resistance: 0.008 ohms PWM Frequency: 2300Hz Motor/Battery Wiring: 16-Gauge Weight: 33g (1.16oz) Thermal Protection: Thermal shutdown The HPI SC-15 WP ESC looks to me like it will work with the 540 Sport Tuned motor that I have in both my Lunchbox and MudBlaster II. Here are the specs for the HPI ESC Power Source 6.0-8.4V Current Rating: Forward 200A, Reverse 100A Voltage Regulator: 5.0V (circuit board protection) Motor Compatibility: 15T and up (7.2V), 17T (8.4V) PWM Frequency: 1Khz Am I correct in my understanding of the compatibility of both these ESC's with the 540 Sport motor? Not sure why I really jumped on the Traxxas ESC without doing a little more research first. I suppose because it was suggested as being compatible with the 2075 Servo lol. I need to slow down my trigger finger when it comes to making purchases for my habit, errrrr hobby. Thanks in advance for any insight/help/facts. This forum has been a blessing in getting good information. Share this post Link to post Share on other sites
Percymon 2184 Posted March 2, 2012 The Traxxas ESC is designed for 1/16th or small scale models, such as the 1/16th Slash, mini e-revo etc. Those trucks come with a 380 motor in brushed form. They are relatively light trucks too, despite their durability. You may get away with that ESC and a sport tuned (ca 23turn motor) given it will supposedly handle much lower turn 380 sized motors. It does have a thermal cut off, so worst case if you try it and the esc gets too hot it will shut itself down. All depends what you want to run it in - a 2wd light truck like a Blackfoot or Lunchbox may well be OK, run it in something heavier like a 4wd Hotshot and i suspect it would thermal. I wouldn't throw it away just yet, but if you have an option to return it to the seller to swap for something else that may be a safer option. Share this post Link to post Share on other sites
tonysmini 19 Posted March 2, 2012 All of the Mtronics ESC's are waterproof, and the newer versions are Lipo ready too. I use RV12 Assaults in most of my cars and trucks and some of these have had some serious dunkings. I balloon my receivers and putting them into a waterproof box has worked fine Share this post Link to post Share on other sites
WillyChang 1814 Posted March 2, 2012 i hear some racers use Novak's 1/16 ESCs for VTA racing, which is probably hotter than a Sporttuned. Share this post Link to post Share on other sites
Dimsum 0 Posted March 2, 2012 Thanks for the replies. I plan to return the TRX ESC's and get 2 of the HPI ESC. The reviews I've read seem good, and the price is right. I'd rather get something I know is going to work than burn up $50 on a chance. Share this post Link to post Share on other sites
Zac_F83 117 Posted March 9, 2012 the HPI ESC's will work with the Tamiya motors.. return them Traxxas one's.. you need to get XL5 traxxas ESC's to run 540/550 motors.. Share this post Link to post Share on other sites