Okay, I was talking to a guy I know who's son does tractor pulls. The tractor uses 3 massive turbos and puts out around 200psi. He told me that the wastegate his son uses is simply a pressure release valve from a hot water heater. Check out this link and look for them. http://www.plumbingsupply.com/hotwater.html These things can be had cheap and I'm sure can be bought in very large sizes from a commercial water supply company. What do you guys think? Will this idea work? I mean it almost looks like it will to me if it could be bought for a much lower pressure and a larger size which shouldnt be too much of a problem.