http://www.freetrust.be/piaa1/Maximum_boost.pdf So I was searching around on D-series.org and I came across this. It's some pretty good info on turbocharging. Possible sticky to help people here and so I don't have to go to d-series when I'm usually on here? I've also come across a DAMN good boost thread on d-series.org for those considering boosting a stock d-series motor like myself. The stock block and the not-so-stock block and reliability. Some of this information would be really helpful to a lot of guys on here .