Originally Posted by RCZ

I was told the V3 is good for 18psi on an otherwise stock z... I could be totally wrong with this guesstimate, but I guess its only an approximation. Assuming that you will lose a few psi with other high flowing supporting mods...lets call that 15-16psi on a VQ37...would it be fair to say that that is our ceiling for power on this supercharger?

The stock block is probably good for ~11PSI at the limit...

Not only does the 928 impeller produce more power at the same impeller speed...but it also has a higher ceiling as Mr. Squeeze described. I don't know if the top RPM of the SC is limited strictly by the impeller or not, but all in all, this SC + the 928 Motorsports impeller has the potential to go well into the 500whp range with some internals. Hell, it can probably be enough to push those upgraded internals to the limit too.

The other advantage is that you can get the same power with less wear and tear on the SC unit since it will be spinning slower than the stock impeller would be.