COBRAMAN 484 Your lashes sound to tight but better than too loose. I would check with the cam company and see which springs they call for. Your seat pressure are too high. The 600" cam I am getting has seat pressure 120 lbs and 350 lbs open with hydro lifters. Valve float is 6500 rpm. If I can get the comp beehive valve springs, they say an extra 500 rpm more. I think the oiling of the roller on the cam is a big problem. The splash way is not working at low rpm or if you have an
oil pan that has a windage tray.
Some of the solid rollers have grooves that drop the
oil right on the contact point of the wheel and cam lobe. If I was building a solid roller motor, a would tap the oiling sysem and make a spray bar spray
oil right on the cam and lifter. Idling is what kills these lifters,
I would also lighten the valve train if possible, Valves, pushrods, retainers, rockers, going to complete roller rockers with the correct geometery for the rockers to stay centered on the valves. 20 lbs Alum flywheel wouldn't hurt either
Itbite I have seen hydro roller lifter with 200k on them and no wear problems. You can't compare a GM motor to an FE. Oiling systems are way different. This is a problem we are trying to get a hand on and fix for future cobra FE builders and owners. Rick Lake