The ONLY advantage to using verticle gas porting is the speed of the pressure spike getting to the back side of the ring.
EVERY other advantage, (top ring land strength, gas ports staying unclogged, heat in the top rign land,, etc.) are ALL on the side of using the lateral gas ports in the top ring groove.
I hear nascar uses the lateral gas ports. I called Ross this week about my pistons and they said to do the vertical ports, that they were better. I don't know myself, but that's what Ross said. I would like to know what JE thinks. They seem to be on the cutting edge right now.
Ok, so the lateral ports are better for what most of us do..
Good info Randy and Barry. That is kind of what Jerry and I talked about last night. I am going to be adding gas ports to mine and was going to go vertical, but I can do laterals instead. Can you tell me the size, how many, and depth? I assume the lower quadrant of the hole needs to stay off the bottom of the ring groove, the depth would be to the bottom of the ring groove (laterally), and maybe 12-16 holes?