physics comes to mind and power loss, fuel traveling through air is going to freeze, warm up the air and lose power. you dont want suck through you want blow through, and remember supercharge life is approx 15-20k when passing fuel through it compared to 80,000-100,000 when it only has air passing.
dave
same as not being able to use diesel turbo's on petrol engine's.....
hahahaha as if that were ever true !