manual boost controller

[cre]

Here's a DIY on it making boost controllers with a couple weak diagrams on vacuum routing:

http://www.gusmahon.org/html/boostcontrol.htm

You can source vacuum from either the manifold or the turbo, sourcing from the turbo is the safer setup when you're not running a boost controller... it reduces surge, both heat and temp (this is of course not relevant when running any sort of boost controller).