Will a ULE help me tune my xvalve to Response trigger?

All I want it 10 to 15 bps...
My valve is totaly capable of RTing, I put a classic rt on-off in it and it RTed wit no problem. Onlg problem is the pin is broken so I need a new one... I have tried to use 147 lengh on-off pin but its still a little too short, I need somthing like a 50...