Quote:
Originally Posted by timaneli
hello.
i am new here and i have a e-maxx 3905 full stock that i want to convert to brushless..
i have already see many optionīs like single vxl, v-twin, novakīs.. etc and the list goes on.... 
i am not very experience on assemble brushless motors and escīs so until now the best option i could find was:
this motor:
http://global.ebay.com/gbh/viItem?ItemId=160255613184
a feigao 7xl that is great for e-maxx..
and this esc:
http://global.ebay.com/gbh/viItem?ItemId=370041594514
i choose this esc because is cheaper than otherīs like mmm or kontronikīs etc... and because come with a useful digital programing card and have reverse and bec, etc...
i have 2 packīs of 7cells 4300 nimhīs bateries that i have to wire in serie, so with this motor and esc connect on 14 cells will i have a good and durable brushless combo?
my intentions are 80% bashing and 20%track..
and i canīt spent more than 150 dollars for now..
i am thinking going this kit because single vxl have heat issues and the esc is limited to traxxas motors , and novak is limited to novak too, so i prefer to invest is something upgradable..
give me your expereince opinions and if i will spent my money good on this parts!! 
regards and thankīs in davance!! |
Monster Trucks need more torque, the 7XL will get hot quickly unless you gear it for really low, I would run a 8 or 9XL...the larger the number the more winds it has and the cooler it will run but will run slower you compensate with more voltage.
Low KV + High voltage = happy and cool running system
and this is your system will be pulling a certain amount of watts and if you are running higher voltage it will pull less amps, and amps = heat, gearing can come into this also if you gear too high it puts more starin on your motor and that will cause heat also.
Feigaos also run hotter so it will always run pretty warm no matter what you do, but you dodnt want it so hot you cant keep your finger on the motor for a few seconds
with your max I would go with a MM with the on board BEC disabled with an external BEC hooked up, 4s lipo 9XL feigao motor, if you cant afford that much now I would wait till you can