That makes sense. The g's being more efficient, but "perhaps" the T's have a higher surge limit to allow for boost at lower rpm. That would make sense for having more full length blades I think, and goes well with the Saab design philosophy about low end torque. Does anyone know what the flow limit is for a 15T though? If it's the same as the G or not? Just curious where it runs out of breath. Thanks bunches!