408 hyd roller, too much spring pressure?

Swede408 said
Well probably that's the subtle sound remaining after startup.
Would a "slow leakdown" lifter like HGH 5006S Hughes Engines be an upgrade, or are all stock style Magnum lifters limited to around 130/330 lbs?

I notice that Hughes recommends both the stock type HGH5006 and the fast bleed HUG 5007 for springs up to 145/358 lbs (for instance for cam SER7076ALN8).
Wouldn't the fast bleed lifter cause more bottoming out problems? Or perhaps the limitation of the stock lifters are not only in the noise-causing bottoming out?
Click to expand...
It's more a case of iron core than the lifter.
It won't last. That's why they make them out of billet for hp applications .
I would try and keep the seat pressure around 125-135lbs and the open doesn't need much more than 315-330 for 6000ish rpm or less. Weight of valve train matters. Once it's not enough open pressure... the lifter is allowed to grow/pump up...once solid and still short on load... it starts bouncing and everything goes down hill.