This is the specs of a stock Syclone turbo compressor & turbine. They are on the small side IMO The engine is a 262 CI gets full boost ,when rolling into the throttle (14 PSI) by 2000 RPM,, 2100 RPM stall converter.
Turbine housing: 8 cm2 = 0.57 A/R Compressor housing is a .60 I believe.
Compressor Wheel 48.3 mm / 68 mm(Inducer / Exducer) Turbine Wheel 55.3 mm / 65 mm(Inducer / Exducer)