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| 380 tuned sport question | |
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| Topic Started: Dec 17 2015, 09:48 PM (931 Views) | |
| NoDakBlizzard | Dec 17 2015, 09:48 PM Post #1 |
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I have searched and have not found an answer to my question. Will the stock SR esc run the 380 sport tuned motors? TIA |
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| Nouseforaname | Dec 19 2015, 04:11 PM Post #2 |
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I tried Dromida 370's with the stock esc's and one esc lost reverse after a few min. Not sure if it was a result of the motor or just a bad esc as the esc was not very warm. These motors are hotter than Tamiya 380's (Sabertooth 2x12 would hit overload on full throttle starts). |
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| NoDakBlizzard | Dec 19 2015, 04:19 PM Post #3 |
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Thanks for the info Nouse. I couldn't find any info on how many amps the esc can handle. I kinda figured somebody here would have tried a hotter motor with the stock esc. If I burn it up, then the sabertooth will be purchased shortly. |
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| Nouseforaname | Dec 19 2015, 05:00 PM Post #4 |
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No problem, I was going to use 2 Traxxas xl5 low profile esc's as they are waterproof and will handle hotter motors than the sabertooth. Can get them for around $25 each on ebay. Sabertooth does have mixing built in, but I was disappointed in the current capabilities. I ended up going brushless as they were on sale, went with 4100kv so its not too fast. I bought a v-tail mixer, but went back to dual stick for now. |
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| McTrigger | Dec 19 2015, 08:09 PM Post #5 |
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I find with my 4500 kv bl motors I strip a lot of gears. Especially when using the metal tracks. Problem is if its wet snow you pretty much have to use the metal tracks or it packs up on the rollers and drive sprocket. I usually only plow when the snow is wet. The gear mesh with the bottom drive gear is terrible and you cannot adjust it. I am thinking of going with an even higher kv motor with hopes of having less torque. I'd rather the motor run hotter and run out of power than strip the gears. My favorite driving is the in the powder where faster is always better. Can always take the plastic cover off, as a little snow isn't going to hurt the motors and the open air would help keep them cool. |
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| FrozenRC | Dec 19 2015, 08:56 PM Post #6 |
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I wouldn't recommend the xl5 as it has a "brake" or overload circuit just like the stock escs that can results in the double-tap to reverse directions |
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| Nouseforaname | Dec 19 2015, 09:13 PM Post #7 |
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I highly recommend the FrozenRc transmission mod, the gear plate cannot flex causing the gears to skip. http://s1.zetaboards.com/RCsnowcats/topic/5746425/1/#new |
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| McTrigger | Dec 19 2015, 10:01 PM Post #8 |
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I have my xmsn braced at the top its rock solid when I try to flex it by hand there isn't movement. I don't want a complicated set up to disassemble every time I replace the gears. I'm pretty sure the damage comes from using the metal tracks or if I get a stick or something through the tracks when I use the plastic ones. |
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| NoDakBlizzard | Dec 20 2015, 12:02 PM Post #9 |
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I have been doing quite a bit of net surfing on reversing motors. Most info found relates to mabuchi 540 motors, less on 380 and even less info on stock 370 motors. The general consensus I have found is stock 540 motors have 24 degrees of timing advance. So that means running the motor backwards you have 24 degrees retarded. |
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| FrozenRC | Dec 20 2015, 12:17 PM Post #10 |
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I think I originally found some info that led me to believe that the stockers where about 10 degrees. |
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| NoDakBlizzard | Dec 20 2015, 12:42 PM Post #11 |
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I was just reading up on an rc car race organization rules. Pertain to stock class 540 motors, cans must have the notch that locks 24 degrees of timing. I'm still uncertain of the 380 timing, but I do know the can is notched for the timing lug. It seems the best way to check a reversing motor is amp draw forward and backwards. A true 0 timed motor should read the same both ways. |
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| FrozenRC | Dec 20 2015, 12:49 PM Post #12 |
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That is 100% true, and extremely difficult to do on sealed can motors. Kyosho originally sent me 2 replacement motors so I tried on one without success, however I didn't try very hard. I just found 2 motors out of the 4 that where close enough that I could trim out the issue. |
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| NoDakBlizzard | Dec 20 2015, 01:05 PM Post #13 |
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Just out of curiosity, have you checked the temperature on the motors after running? |
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| FrozenRC | Dec 20 2015, 01:50 PM Post #14 |
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No never did, I've always setup my SR as a scale type machine, I currently run 380 sized crawler motors on 3s for about the same stock speed. |
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| Nouseforaname | Dec 20 2015, 03:50 PM Post #15 |
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Checked few motors current draw Blizzard SR kit 370#1 0.39 amps forward 0.39 amps reverse Blizzard SR kit 370#2 0.46 amps forward 0.46 amps reverse Dromida 370 28T #1 1.45 amps forward 1.45 amps reverse Dromida 370 28T #2 1.25 amps forward 1.38 amps reverse (defective motor, faster in reverse, was ok when new) Johnson 540 1.20 amps forward 1.20 amps reverse Mabuchi RS540SH #1 1.25 amps forward 1.25 amps reverse Mabuchi RS540SH #2 1.30 amps forward 1.30 amps reverse Trinity Monster Horsepower 27T Stock spec motor (has advanced timing) 2.10 amps forward 1.80 amps reverse |
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