Sp 2 Temp Help . . .

Hey You All BL Mentals :) ,
My name is Ron from Israel ,
Im Reading the forum since 95 almost everyday.
Its very hard 4 me to write in eanglish , but i can read and understand very very good ( thats why i never post....) ,
I need some help from you guys ,
Im the only BL racer in israel !!!! , 1\8 buggy .
My setup is -
Lehner 1940\7 BK 9918 flight power 4900ml gearing - 15/46 , cutoff set
To -3.5V .
The out side tepm is - 45c , batt - 62c ,motor - 75c , controller - 82c . run - time - 14 min ( under very hard race condition ) .
And i need to get 15 min , and 30 min a man ,
NEED TO KNOW HOW TO GET THERE .... !
(I will never ever go back to nitro .... ) TNX ,
Ron .