Quote:
Originally Posted by Team No Idea
Hello chaps......right im a tad lost in the land of gear ratios. Bit too complicated for me!. 
Ive fitted an LRP X12 10.5 to my SC10. I have ran the truck in the past using a Novak 6.5 motor and had a few overheating issues. I ended up dropping the the spur gear to a 78 tooth.
Now here comes the complicated bit.... in the motor instuctions it says to run the 10.5 at a ratio of 9.0:1 for "truck off road". erm so any ideas what pinion i should be using? . I did have Gear ratios explained to me a while ago but for the life of me i cant remember a damn thing about it!
any help would be fabbo!
Thanks!  |
You went the wrong way on the gearing by putting a smaller spur gear,you either needed a larger spur gear and/or a smaller pinion to gear the car down,this would make the car quicker off the mark[less load on motor batterys etc] and slower top speed.
A 6.5t motor is also better suited to touring car sized wheels[10.5 should be better suited and run cooler],if i were you i would gear it down as much as you can to try and compensate for the high revs of the motor,if it`s still getting too hot,try turning the power down if you can with your set up.
Truck or buggy wheels are bigger,they gear the car up,so a lesser KV motor works better for those types of cars.
HTH
S.