Originally Posted by
motorman
I did some calculations for my car e34 535iA using the second size up with the whipple supercharger, std compression, intercooling, about 8lb of boost, also using a rising rate fuel pressure regulator (which leaves rest of fuel system stock) more boost required extra injectors and an extra ecu to control it. calculated hp with this setup including calculated power to drive the compressor was about 310. figures where based on info in a book on supercharging by corky bell, easy read and easy to understand