It doesn't matter what SAT scores you guys have been getting on practice/real tests in the past. Everyone is capable of getting at the least a 2000 SAT score if they follow these simple steps:
1. Buy CollegeBoard's blue book with 10 practice tests for $13(new) or $7(used) on places such as Amazon. You are buying this book SOLELY for the practice tests.
2. Take a practice test a week. Don't do marathon test sessions where you take the whole test in one setting.
3. Review BOTH your right answers and your wrong ones. You review your right answers so you can identify what you're doing right and you review the wrong ones to fill gaps in your SAT knowledge.
The strategy above has been mentioned many times in the past, but this thread is a refresher.
I genuinely believe that the SAT score can be modeled by this following limit:
lim [SAT score function] = 2400
(Where n is the number of CollegeBoard tests you've taken and reviewed. Taking and reviewing CollegeBoard tests is the essence of Xiggi's method.)
Some optional tips to consider would be Noitaraperp's CR strategy and AcademicHacker's How to Write a 12 Essay in Just 10 Days.