ORIGINAL: canardlover
You will reap a LOT of benefits by also streamlining the exhaust port bowl. You have increased flow in the intake bowl, by doing likewise on the exhaust bowl you will positively influence scavanging, thereby further increasing the intake flow.
Yes indeed you are correct but the ''operation'' was so demanding that I hesitate to repeat it....[
].. Next time I think I will rather try to preheat the cylinder unit, push out the bronze valve guide and work from above.
Why not make the flow divertor part of the valve guide itself? [X(]