After looking around the internet for a bit i seem to have come up with little to no concrete information on performance engine building.
This may be due to my poor searching skills but i think its more likely that the people in the 'know' aren't going to give the info away for free.
im interested in finding out how to build intake and exhaust systems that are properly tuned for a particular engine etc and all the theory behind it.
So what i am after is suggestions of good books on the subject of normally aspirated engine building/tuning.