Big port head flow tuning

[eight-six]

OST - I have basically done the same as your self with a spare head, mainly just for the sake of experience more than anything else. Would post some photo's but I am struggling taking them with my Iphone.

I have focused on the bowls and cleaned up / smoothed the various lips etc. I have also run down the ports cleaned up the casting marks and applied the appropriate finish to the ports.

Out of interested have you noticed depressed areas in the ports just before the valve (seems to be more prominent on the intake side)? Just wondering if this has an effect or if removing the various sharp edges and excess material and smoothing the bowl out will be suffcient and aid flow?