if you compare this
Vortec XR8
from this thread
Here
To mine from a few posts up you can see mine has it up to about 140Kph which is around 4000RPM even though it makes over 80RWKW more than mine at the top end. After 4000RPM that other car suddenly wakes up and would leave me in the dust.
I am not trying to convince anyone mine is better or anything, just show the diff between PD and centficical blowers.