I was just wondering what the actual process of flow testing a head was...

I have head a head ported and polished, but it was never flow tested. Lucky, the head performed very well without being tested.

I thought that as long as the ports were bigger and smoother, they would always be better than a stock port. But i've heard that some port & polish jobs actually perform worse than stock!

So, if anyone can chime in, it would be great.