AG burr finish
I'm not sure if it's worth worrying about too much unless we could dyno test back to back. If a 500hp engine loses/gains about 8-10hp from a change in the port finish that same change can be the difference in the effect the weather has on a tune up from one day to the next. I actually would be surprised to find anything more than that but I could be wrong. I had a set of heads I did for a buddy some 15 years ago here recently , they had bad seals but here is a pic of what my port finish looks like.
I was hindered by the tulip valves/sunken seats on the intakes and previous bad port work lol but I managed to get 252/190 @.500 and 255/197 @.550 out of them, they are 596s with my favorite exhaust port. Even though they have a hole in them at least they actually have a short turn unlike x/j heads..
A set of chevy heads I was doing about 8 years ago, bad pic but similar finish. For some reason I don't have any newer pics, guess no time for fun.
I'm not sure if it's worth worrying about too much unless we could dyno test back to back. If a 500hp engine loses/gains about 8-10hp from a change in the port finish that same change can be the difference in the effect the weather has on a tune up from one day to the next. I actually would be surprised to find anything more than that but I could be wrong. I had a set of heads I did for a buddy some 15 years ago here recently , they had bad seals but here is a pic of what my port finish looks like.
I was hindered by the tulip valves/sunken seats on the intakes and previous bad port work lol but I managed to get 252/190 @.500 and 255/197 @.550 out of them, they are 596s with my favorite exhaust port. Even though they have a hole in them at least they actually have a short turn unlike x/j heads..
A set of chevy heads I was doing about 8 years ago, bad pic but similar finish. For some reason I don't have any newer pics, guess no time for fun.
