I've seen Mike's car --I've seen it run at the track --he's pulling those times ..If you look at the post of turbo dyno charts that was in the tech forum not to long ago - you would see that the the HKS turbos that Mike has put out on average about 500-530 rwhp ... With 18% driveline loss that is about 650hp at the motor ...650 is NEAR 700 ... I'd say that is a pretty close guess for no dyno... It's pretty simple math guys ... you don't need a legitimate dyno to be close or "NEAR" ...