I had an 03 350z with some mods (CAI, Kinteics SSV Intake Plenum, and full Borla setup with resonated test pipes) and while they are not speed demons, they are fairly quick. If launched correctly, they are right in the powerband of the VQ. I am sure that my mods certainly helped, if I remember correctly when I dynoed it it was at 263 HP at the wheels. I will admit, though, that it was ready for a full engine build and twin turbo setup, which should have put it at 550whp on pump gas, according to the enging builder. As stated earlier, the big weakness on the earlier VQ's would have been the intake tract...very, very restricted. Best way to see what happens is to line them up, and punch it!!!