Contour Enthusiasts Group Archives Forums Modifications Forced Induction Engine Management, new stuff for the emanage.

The cheapest way is to use a manual controller. From what I've seen, the manual controllers are just an adjustible needle valve that allows you to control the rate of leakage on your wastgate at the point where the boost pressure feeds back into the wastegate.
On the supercharger you would want to make a controller for your bypass valve. I think you could make something that allowed the boost pressure to open the valve at some pre-determined point and then regulate it with a needle valve the same way.

warmonger