One thing to keep in mind when compressing air, it takes power to compress it. The higher the pressure with the same size compressor the more power it takes to make that pressure. A bigger compressor turned at a slower speed that makes the same pressure as the smaller compressor will probably go faster in a race car with good traction
Another thing to remember is compressing air makes heat, hot air expands and take up more space than cooler air does
I can't remember the HP lost due to changing the manifold inlet temps from. 130F to 190F by letting the motor warm up more before making the two pulls with no other changes, it was more than I thought it would be