Planning ECs for Junior Year - are 100hr weeks normal?

Yes to both. I’m aiming for at least a 1550 on the SAT, 770+ on SAT-II (800 on the one in my language). I really haven’t done much prep for the SAT at all so I need to do more than normally needed.
I am a dual citizen with the US and another country (non-English speaking, won’t disclose for privacy reasons). If I take the TOEFL, I’m eligible for so many scholarships, including full rides.