Let me say this about lash on a solid roller camshaft, it is put in there by design. The camshaft has what is called opening and closing rams. The lifter is eased of the lobe and then is accelerated very fast, and it is the same on the closing side. The lifter is closing very fast and then it is caught by the clsoing ramp and eased on to the lobe. There is no reason for the lash to slam anything and is there by design. Most solid roller fail because of the spring rate and the lack of
oil to the roller.
This why they came out with the new lifters that direct
oil the roller to help the life of wheel. The smoother the lobe the less spring pressure you have to run. The lighter the valve, spring, retainer and locks the lighter the spring pressure can be as well. The advantage to the hydraulic roller is that you normally run a smoother camshaft and have less spring pressure so they last much longer normally.
If you run a street solid roller that is smooth which most are you can get away with 150 on the seat and 400lbs open in most cases with a small block because of the lighter valves. Every engine is different has a few things that will affect the valve train on that engine.
We do hydraulic rollers that will turn 7000 rpms on the street and run for 100,000 miles if you know what you are doing. The deal above about the spring pressure beating the lobe out on the closing side crazy to me. It almost sounded like it did not have enough spring pressure and the valve train is bouncing. A 3/8 pushrod should have been plenty strong with the spring pressure used. To many people getting to much advice from people that do not even know about this stuff.
Good luck, Keith