It does sound somewhat similar to a stock nsx...
http://www.youtube.com/watch?v=Vt5uyvNoLWU
Revving at 9-10k, I'm sure the vz's will sound a whole lot better... can probably get some real f1 style sound going
I think this should be the unrealistic target sound:
http://www.youtube.com/watch?v=MiroepFi1fw
Just.wow.