3 Racing Sakura D3 CS Drift

i just used a cs calculator app on my phone. it dosnt have an input for motor size though but i think it assumes we all use 10.5.
you can go to a 78 spur and it wont change the fdr much.

What app do you use? I've got one but it doesn't have input for spur or pinion.

its just called cs calculator. maybe iphone only? i dunno.