[Racer x]

I guess you mean valve to piston interference. And having valves that float or bounce off pistons is one side of the problem. That is a weak spring. The other side is to strong a spring that will lead to valve breakage spring brakeage and catastrophic engine failure. Figuring out the spring is the first step. Buying the spring hohoho . If a spring like I need is a shelf stocked item. Then they are 20 bucks each and I can buy the eight I need. Custom wound springs are 200 each and only sold in batches of 16 . Yikes that is over 3000 dollars for springs . You gotta pay to play with the big boys.