For the benefit of Snave, I thought I'd start this new topic. Have you seen this link to a blower calculator at the Sprintex site:
http://www.sprintex.com.au/files/Blower_Calculator.xls
I had some discussion with them when I was considering blowing my car. There advice was that the DFW pistons at 9.5:1 would be good for up to 10psi. After that, forged. I have no idea if they have any experience fitting superchargers to Mi16's. They may just be generalising on the cautious side.

