After adding up the cost of going roller vs solid I need to decide if the gains are worth the significant cost being that I already have crane ductile rockers, pushrods, and springs.
Have any of you switched from solid to solid roller? If so what was the et or horsepower gain?
If you have all of that stuff and want to use it, solid flat tappet. If you don't mind spending some money and want to put a larger cam ( >.700ish lift) you will want to go roller ,aside from all of the other flat tappet break in issues.
It all depends on displacement, cylinder head capability, and what you are looking for out of your engine package. If you are running a 350+ CFM head the characteristics of the solid roller lobe (faster valve movement) and added lift might surpass the output of the biggest solid ft cam when it becomes unstable due to the lower spring pressures.
Whatcha building anyway?
