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Originally Posted by standard_63
I have this same setup -- 9920, 7XL, 4s lipo. It runs great for about 6 minutes and shuts down. Sometimes runs again for 6 more minutes, sometimes only 30 seconds or so. I ordered a 125b controller which will hopefully work with the 7XL cuz it's so darn fast! And pulls wheelies at 30mph! If the 125b doesn't help with overheating, I'm going 8XL. (or, more likely 1950/8 or Neu 1515/1y)
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are you running a seperate reciver pack or are you using a UBEC ?. I use a seperate reciver pack with 14 cells & have no problems so far. Does anybody else that runs this setup have any problems 7XL with 9920 ?.