Quote Originally Posted by ZR1Vette09 View Post
^ I believe you mean 630 WHP
That's crank HP as far as I'm aware.

I investigated three different sources who purchased and then dynoed a new stock ZR1's (three different vehicles).

The dyno numbers ranged from 500WHP - 560WHP so i averaged the numbers to be 530 WHP

Don't worry that's still plenty fast.