I will dig up the pix again simply put the flow is mostly on the outside of the curve , think fluids , so I leaver the floors alone for 2 reasons , 1 it traps un atomized fuel & 2 the flow imporves with increased floor height so why lower the floor & the turbulance on the floor will drive th eflow higher in the port.
, blending in behind the seats & matching the port size to the gasket on both the intake & head & ehaust manifolds is key to reducing turbulence ! Removing the pushrod wall doesn`t help much & actually reduces the veturi effect of speeding the air flow right behind the valve so I usuall square it up & widen it a little bit . The trick is shaping around the guides , you want the guide as narrow & wing shaped as possible with a round leding edge & a sharp trailing edge + by making the higher flow side of the wing longer you will creat a faster flow & create a swirl effect arond the guide & into the chamber , what I do is direct the air flow to hit the back of the valve at about 45-50* instead of slamming into the back of the valve at 85* , by twisting it around the valve head the flow stays very high even at low lifts .
