Turbo Sizing Calculator

Calculate required turbo size from target power and boost.

Target Horsepower

HP

Engine Displacement

Liters

Target Boost Pressure

PSI

Max Engine RPM

RPM

Volumetric Efficiency

Turbo Frame Sizes

Frame	CFM Range	HP Range
T25/GT25	20-35	150-250
T3/GT28	30-45	200-350
T04E/GT30	40-55	300-450
GT35	50-70	400-550
GT40	65-85	500-700
GT42/45	80-110	650-900
GT47+	100+	800+