Porting 596 Heads
Thanks for the reply. If I cant economically save the Head I'll slice it up as a guide and for curiositys sake. Im just glad I started on this port and not the opposite end.
Ok, so I went to far with the first Exhaust Ports? Will there be a detrimental effect?
Andy
Someone can weld it, but if another core is available at reasonable cost, cut it up! I had that worst case happen on a 906 casting I was doing for a 440 6bbl 'cuda, just
putting 2.14/1.81's in w/the appropriate work, the last intake had terrible core shift adjacent to the headbolt hole, heard that "thin" sound coming off the cutter all of a
sudden....Damnit!! I wasn't even close to the target distance from the guide, bit the bullet and pushed the side of the burr against the wall "pop",I donated one of My "stock" & started over. As far as the exhaust, it's difficult to tell from those pics, I just noted You'd been working the floor. Don't, the SS is almost non existent on them, You have
to go right off the last throat cut of Your valve job straight down into the pocket & roll it with as even a radius as possible to the floor. The exhaust "blow down" dumps
most in the first 1/2 of the lift cycle, the valve face/backcut-contour/margin profile, and the seat/pocket have a much larger impact on flow/output here than "hogging"
out the rest of the port.