That turbo should be able to make over 800. My 71mm made 856 at 60+psi. Too bad it wasnt on my truck
But I can only get 400 out of it right now. Trying to get all that figured out. Sounded like it lit well, but my guess would be in the 600's. If you throw it on Dunbar's dyno, I dont think it will do too well. That dyno just doesnt light big singles too well.