Tug Posted September 16, 2014 Share Posted September 16, 2014 got any pics? and,.. same motor mount? Fair comment, the motor has gone from one car to an almost identical car. However, although it's only on 4s, it could just be very over-geared. You can't really under-gear it as it's only on 4s. I've not had one of these, so don't know what ratio is best, but I'd start with dropping two teeth off of the pinion and starting the testing again. Quote Link to comment Share on other sites More sharing options...
Pistonhead Posted September 16, 2014 Author Share Posted September 16, 2014 I'll try it on some spare buggy wheels tomorrow and see if it runs cooler, if it does then i'll be gearing down a tooth or two and maybe even put the ST diff pinions back in to drop the gearing further. Quote Link to comment Share on other sites More sharing options...
K.nov Posted September 16, 2014 Share Posted September 16, 2014 Same situation happened to me a before, and it turns out I wasnt tinning the wire properly before soldering connectors. A properly tinned and soldered connector would need extreme heat to unsolder itself. Imo you're joints are unsoldering because of poor contact patch between connector and wire, could be cause of extreme heat too as poor contact leads to more resistance which equals heat. And you are over geared for your setup. The St-e is a much heavier beast than the Hyper 7. So would need to gear accordingly or you will be seeing a ball of flames in the near future. 1 Quote Link to comment Share on other sites More sharing options...
danb1974 Posted September 17, 2014 Share Posted September 17, 2014 Can we have pics please A proper solder joint should not unsolder unless it reaches temperatures above "motor toast" point Quote Link to comment Share on other sites More sharing options...
king156 Posted September 17, 2014 Share Posted September 17, 2014 I tend to dip them in lava Quote Link to comment Share on other sites More sharing options...
Pistonhead Posted September 17, 2014 Author Share Posted September 17, 2014 I have a feeling the motor may be the cause of my problems, re soldered the connection that came off and did about 10 mins of speed runs when it happened again, motor still very hot and on closer inspection, the rear cap on the motor has come away from the main casing very slightly. Sorry about lack of pics - forgot to take any, but i will get a close up of the motor a bit later. Quote Link to comment Share on other sites More sharing options...
sean-vrs Posted September 30, 2014 Share Posted September 30, 2014 try some high melting point solder, you will need a decent iron but it might cure your issue Quote Link to comment Share on other sites More sharing options...
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