My budget RB25 build was as follows using a hypergear SS1PU on 98.
Nistune, HKS 555cc Injectors, Z32 AFM, Walbro 255 Pump, 3" Intake, 3" Exhaust, Blitz Super Flow Pod, Hybrid Intercooler, KB Heavy Duty Clutch and Profec B Spec 2 Controller
This turned into a clean 250rwkw with 20psi tapering down to 16
I’ll see if I can dig up a dyno graph