bjuice

These guys did a good job of explaining the science of it.

Also just to add I do not know if a Hydraulic Roller would act the same as regular hydraulic cam and lifter set up in that its very forgiving if you stay in the gas and twist one tight it will float the valves before turning on up breakiing something. Not so forgiving with a solid flat tappet. I still run a solid flat tappet in a small block 406ci in a 69 camaro. Small but very responsive and effective all the way around .