Roller Rockers in Stock

[SSDiv6]

Originally Posted by Jeff Lee

Well SSDiv6, you may have access to scientific instruments and labs, but I knew from the get-go when I took a Speed-Pro/TRW AMC rocker and "thunked" it with my fingernail and it went "dunk" and the OEM rocker went "diiiinggg" , then surely the factory offering was better . Although that did lead to a rockwell hardness test which confirmed a huge difference as I suspected...

The lab test allowed me to see the variation on materials and try to find the solution. Yes, you can do it the "Redneck" way via the resonance test, however, I was trying to find how much variation between manufacturers, its ductility and malleability. What I also found with the replacement stamped rocker arms is that in addition to the cycles and loading they are exposed to, the heat affects the malleability.