Turbo Restrictor Power

[Toohey]

Hey, i'm new here but i'm planning to by a supra in the near future and use it for purely track racing.

First question of many. I'm planning to transplant a 2jz into a MKII supra, and looking to turbo charge it at the same time. the main issue with the racing regulations is that i can use any turbo i want as long as its a single setup and is fitted with a 32mm diameter turbo inlet restrictor. Assuming a fully built race engine, what sort of power would i get with a restrictor fitted?

Note that daily driveability is not needed as it is only a closed circuit race car setup being built.

Thanks