This thread is about what David Vizard is doing with some shitty tiny heads like those in that previous post that only have a 145 cc port. David's not average nor are those guys. I'm not interested in what the average guy does as that would be an argument for mediocrity. If you are not trying to better yourself everyday than you've made your choice.
What I build and what I race has ABSOLUTELY NOTHING to do with this thread. Facts are facts and engines can be built to make over 2 HP per CFM of airflow that they receive.