Here is what I've gathered reading this thread
- User purchased an ARRMA VORTEKS
from Tower Hobbies (possibly the BLX model).
Based on Tower's description, the kit comes with a 6-cell NIHM battery. (http://www3.towerhobbies.com/cgi-bin...=LXDKGSBB&P=ML
- User runs the stock speed control & motor (3600kv) which should be able to handle speeds of 60+ mph if running a 3s lipo based on the info I found on this page. (http://www.arrma-rc.com/radio-contro...story-board#41
- Stock gearing for the Brushless model of this kit appears to be 57 tooth spur & 15 tooth pinion according to the manual found here (http://www.arrma-rc.com/support/downloads
Manual does advise the following concerning gearing:
Upgraded motors/ESCs and non-standard wheels may require different gear ratios. Try to find the best balance between speed/
acceleration and handling/performance. For help selecting the correct gear ratio for your upgrades visit the GO FOR IT forums at
- User changes gearing to 54 spur & 20 tooth pinion (max gearing shown in the user manual). Effectively user goes from 57/15=3.8 to a 54/20=2.7 ratio (not including gearbox reduction).
- User installs (unknown battery) and runs the car "up and down the street). Result is motor gets too hot and has issues with 2 ARRMA speeds controls that need to be replaced under warranty (one melted down).
- User installs an aftermarket battery, speed control, & motor from ANOTHER car and has issues with aftermarket motor (possibly overheated stator).
- In the following video created by Hobbico they confirm that a 54 spur/20 pinion with a 3s lipo (2550 mah) will go over 60mph. With a 2s lipo around 50mph. Out of the box (with stock gear/Nihm battery?) a little over 30mph. Note on the high speed runs that they are using a lot of distance on a closed road (not exactly running "up and down" a street).
The fact that the user had multiple stock speed controls fail (one melted) and the stock motor overheat as well as aftermarket electronic issues leads me to believe one of more of the following...
- There was a mechanical issue with the gearbox or mechanical issue creating excessive drag (causing the overheating)
- Gear mesh is way too tight causing issues with the motor (which could cause overheating)
** Motor over-geared for environment the vehicle was being used
The reason many of us suspect over-gearing is it takes a lot of distance for high speed runs (as is seen in the video). If you didn't have enough space, you were constantly making the motor/speed control work very hard to get your car up to speed. Not only will this heat up the motor, but it can also over heat the speed control. Without knowing the exact environment you ran your vehicle in (size/length of street), it is hard to know if it is possible to safely reach 60+mph there.