You already read this last week, if not you should.
and now`Tech & Math :
Let’s get started with a commercial website which offer a good basic overview about almost everything; can be very useful for understand basics
You should have a look at this:
& In general sneak around this 2 forums:
like this head porting bunch http://guy-croft.com/viewforum.php?f=2
If you get hot there is a link for build a pretty “serious” DIY Flow bench
and this one, for the last link i would not follow so much they porting advices, a little ruf and unclear to me but stick on the eectuning & Guy Croft advices.
Anyway this last document give a good overview on how to do it technically
At last keep in mind that everyone have different opinions on porting .. have fun with that & find your way.
Still thirsty ? a bunch of link there