Roller Rockers

340Dart said
Would it be worth it to go from my crane doctile iron rockers to roller rockers. The cam lift is 508. How much gain? 1.5 ratio. Thanks

Fred B

A good upgrade is to go with 1.6/1.5 RR to get you some more "true" lift at the valve and add some bottom end torque. I have measured quit a few stamped steel rockers(not cranes) and many (if not all) were less than the 1.5 ratio.