No I have not compared any notes just spent many hours modifying the exhaust port both in shape and in the chamber. Intake was easy.
Found a lot in chamber design hence why it is getting welded.
Yes you are right the std big port air speed is way to slow(virtually none across the floor and slowly got better towards the roof). If you ran a bigger valve with the untouched port and turned it 8000 plus it would work well.
That why I stayed with the small port and std valve and modified it.
Good airspeed all the way through the lift up to 500 which will give good power all through to approx 7500 with good throttle response for coming out of corners.
Hopefully I will have the trial head digitised and then be able to tweak the ports on cad and run cfd on them and hopefully have a cnc program for them.
May take a while eventually I would like to be able to do a CNC head and CNC manifold package.
Cam shaft I have not yet decided but will be in the 450 to 500 lift range and duration at 50 somewhere between 240-260
Should be able to run good compression without milling to much of the head due to the chamber design.