Yeah thought that might be the case with centrifugal type blowers.

I think I'll do what I've done on my 03 wrx and run the 2 NOS systems independently of each other, a small one for down low to spool up the turbo and the other one for a top end kick. On the '03, I run a 35hp shot down low and a 100hp shot up top and that's with a stock motor so I'm guessing with the motor in the black one I should be able to double that and not worry it too much...?