Decent in Speed and originality would with an RB26 is not.
That’s backwards technology. Originality would be like Pete said, a Rotor in your Z. To stay in line with date you’d go Renasis from a new RX-8, but you’d die with reliability issues.
A Rotor is good in that it will spin almost forever at any RPM considering you take off almost all the reciprocating mass and remove majority of the rotational mass.
Boost the motor (not really an option) and you have a serious punch. Couple it with another Renasis motor set and you’ve got a beast. A+ for originality.
But then again, you can get originality from putting in a L series motor from a 240Z in a 350Z.
You really need to be more specific. Speed in what way? Circle Track? Drift? Drag Race?