Factory hydraulic roller lifters RPM

[psi_duster]

I'm looking at starting on a 3.79 stroke build with trickflow 190 heads based around a 5.9 magnum block 500hp +.

Wanting to hear from people running the factory type hydraulic roller lifters.. what rpm are they reliable to?

 

[jos51700]

Legit Question: What are the rates on those valve springs?
OP asks a really good question, in for the responses.

 

[psi_duster]

These are the specs of the available spring options.

 

[mopowers]

Are they RPM limited? I would think the limiting factor would be spring pressure and having a max lift low enough to ensure the oil band is still covered. I've seen some pretty stout combos on this site using stock roller lifters.

 

[BrianT]

I’ve been running Morel factory style roller lifters in my 408 for five years now with no problems. It’sa street driven car but sees the north side of 6 grand almost every time out. I think proper springs would be the limiting factor.

 

[jazak5]

ok redirect// needing the same info//
what spring pressures do I need using factory roller lifters to see a SAFE 6500rpm ?