Max Valve Spring Pressure for Reground Camshaft

[mopowers]

For those of you with reground hydraulic roller cams on stock cast cores, what kind of spring pressures are you running - seat/open?

I'm considering having a stock roller LA cam core reground to 233/241, .544" w/ 1.6s. but was told not to go much more than 110lbs seat and 300lbs open for spring pressure because of the cast core. Doesn't that seem light for a hydraulic roller cam with those specs. It's a just a street motor and won't see crazy RPMs, so maybe it'll be fine.

 

[RustyRatRod]

Whatever your cam grinder says. There's really no difference between a new one or a regrind regarding that.

 

[GTX JOHN]

I have run as much as 140 on the seat on my street cars with
no issues for a number of years with a quality CWC cast iron
cam. I never use the new Chinese cams in anything. I would rather
regrind the cam when there is enough left on the lobe to do so.

However, I never let the cars sit idling for more than a minute or
two without shutting the engine down in any of my cars.

 

[Bewy]

Flat tappet core are 'cast' & they can handle much more than that. It is the barrel diameter, the section between the lobes, that takes the load [ & flexes if not big enough ].