My homemade go cart turbo topic got closed with no explanation and i still have a few questions. I've decided to use a soup can for the exhaust housing and the top of a 2 liter bottle for the intake side. I'm cutting fan fins out of sheet metal but i'm not sure how i should shape these or how far to space them. i'm shaping them the same like the 2 liter bottle right now but how many should i have? i'm going to use some ball bearings for the shaft. i'll probably put a heatshield around the plastic so it doesn't melt. what kind of turbine design would make the most pressure? point out problems or add something. i want to do this and it seems possible. If this is closed again, i'd like a reason and i won't post about it again.