I am going to work through getting a set of custom pistons made for my road racer instead of using the DP62 one's other have used. I am in the process of filling the form out right now (Carrillo) and am trying to first, get a sense of what they are asking for and second, see what features would be worthwhile on our bikes.
Here is the custom order form and things I have questions on:
I am also looking through the features found here:
http://www.cp-carrillo.com/pt-3507-pistons.htmlI want to understand what the "ultimate" road racing piston would have. My stage 4 head and balanced crank assembly (cycle x rods) will support just about anything I can get out of 62mm piston, but I am also sure not all things are necessary.
I am looking at: Accumulator Grooves, Contact Reduction Grooves, Broaches, and Lateral Gas Ports. I will also explore hard anodizing as well as dome coatings. Anything regarding how the dome is finished is where I get lost. I am shooting for that 12:1 range with as flat a dome as possible to get really good burn (per Mike Rieck). I would consider milling additional material off the head to shrink the chamber volume to get a flatter piston with the desired compression, just not sure where to begin.
I would welcome experience from anyone who has some knowledge in this realm, but specifically for the 750/4 in road racing would be ideal. Looking forward to making this happen, likely to be ready for the 2019 season.