Hello 1/12th guys

, here are some drivers running with a 1/18 packs (1800-1900 mAh Lipos 7.4v) is his 1/12 cars, with 10.5T BL motors, i´m a bit old, and i only know, this car running with 6 cells, and lately with 4 cells, i read about 1S Lipo 3.7v, in this car,too.
But im interesting in the 1/18 packs,and how they behave in these cars, if someone has some experience in this, i would like to know something more.
Now i have a futuristic car,

, Gen-X, and i would like go back to this beautifull category.
Greetings, Luis C.