i am looking at a 1999 37ft active thunder and was wondering, how fast should it run with 625hp a side with bravo xrs and how much power to get in to the high 90s and low 100s.

Which boat is it? Is it a straight bottom or a step bottom?

Step bottom

It's "Ready to Rock" Blaines boat. I'm sure it will touch 90 with current setup and labbed props. Probably 700+ a side to touch 100