[Rich Biebel]

I just disassembled a 400 small block bracket engine. Dome pistons.....13+ to 1 compression. .043" narrow radial width top rings with vertical gas ports. The engine has 450 runs on it and still ran fine and rings were not worn out. It is 3 seasons old. I did not build it but I am just going thru it... The car can run in the 9's at 3100+lbs so it is making good power. Never really felt a narrow top ring with gas ports would go that many runs........Well it did and could have run probably quite a few more. The owner uses a restrictor plate to run 10.0's at 7000rpm or so......