Stephen;
This book comes up in ebay stores fairly often, you may be able to order it in or borrow it somewhere. It's got alot of good information in it that you may be interested in, regarding Zetec buildups.
High Performance Ford Focus Builders Handbook by Richard Holdener.
It covers building up the Zetec and Duratec engines, for naturally aspirated, turbocharged, supercharged, and nitrous applications, all with dyno charts.
Might help you with your build.
Tim
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