Xray XB4 thread
#4848
#4850
Tech Regular
iTrader: (3)
XB4 issues....need advice.....18 tooth pinion, tekin rs pro, and a tekin 5.5. After a 6 min run motor temps at 140ish but the ESC temps at 185.... We switched the motor to an 8.5 and the ESC was still 180.....Hooked up to a Hotwire and found out that the ESC had 80% boost from the factory.......so we took that out and the ESC is now at 170-175.... Pinion mesh is good, vent hole cut in body, fan on motor, bearings are free and smooth and the buggy is built the the manual specs. I am out of ideas on how to get the ESC temp lower.....please help. Oh and ESC and motor combo is NEW
#4852
Tech Elite
iTrader: (33)
XB4 issues....need advice.....18 tooth pinion, tekin rs pro, and a tekin 5.5. After a 6 min run motor temps at 140ish but the ESC temps at 185.... We switched the motor to an 8.5 and the ESC was still 180.....Hooked up to a Hotwire and found out that the ESC had 80% boost from the factory.......so we took that out and the ESC is now at 170-175.... Pinion mesh is good, vent hole cut in body, fan on motor, bearings are free and smooth and the buggy is built the the manual specs. I am out of ideas on how to get the ESC temp lower.....please help. Oh and ESC and motor combo is NEW
Don't know if you can put a fan on an rs pro.
#4857
Tech Addict
iTrader: (13)
XB4 issues....need advice.....18 tooth pinion, tekin rs pro, and a tekin 5.5. After a 6 min run motor temps at 140ish but the ESC temps at 185.... We switched the motor to an 8.5 and the ESC was still 180.....Hooked up to a Hotwire and found out that the ESC had 80% boost from the factory.......so we took that out and the ESC is now at 170-175.... Pinion mesh is good, vent hole cut in body, fan on motor, bearings are free and smooth and the buggy is built the the manual specs. I am out of ideas on how to get the ESC temp lower.....please help. Oh and ESC and motor combo is NEW
#4858
I'm having a hell of a time trying get my gearing right for with 13.5. Been trying 26/81 and 25/81. But, I have to run a bunch of motor timing to get any speed.
I'm going with a smaller spur 75t or 72t with a 25t or 26t pinion to get my FDR around 7.
#4859
My XB4 rear diff is leaking where the 2 parts of the diff comes together : the crown gear and the diff where the fluid is into. Is this because the gasket is worn out? Or something else? Would a rebuild fix it?
#4860
First place I'd check is the 4 screws that hold the gear to the diff case, they might not be tightened all the way or possibly have a stripped screw hex head / diff case threads. It's a good idea to replace the gasket every time you reassemble the diff, but can get by in a pinch re-using the gasket if it isn't damaged or worn out.