As I understood your post I should leave it in this condition (see photo).The bumps.Yes, just flatten them out and leave it at that. Don't take any more material out than you need to.
Not very many people porting heads anymore. I've done 3 sets now and I'm on my second go around on the ones I run now.
The nubs are solid. I believe the only ones they are drilled on, are the California cars... and with those, the nubs will have a hole in them for the air to come out of. Even if they are drilled (CA application), a person should be able to plug the end of the head where the air is injected.can the holes be plugged if not hooking anything up to the port in the back of the head?
thanks, i'm blocking off the port in the back cause i don't want exaust to exit to back of engine. i think it's a 5/8nc if not mistakingIf the ports are drilled, there is no need to block or fill them, as we saw no negative effect from leaving them open. The exhaust simply blows past them like the open door on a skydiving airplane. Just blend the lumps and move-on.