wrench 87 What
oil pump and pressure are you running? What rockers are you running? Running stock rockers The safe number is .070" with a HV
oil pump and min of a #60 psi spring.
If you are running Ersons you need an .080" and a 80# spring for an HVHP
oil pump. I have seen and done myself, blue the pivots when racing. The other thing is the valve springs need to be flooded with oil to remove the heat they make.
Make sure you are running 1 extra quart of oil in the motor either way. The returns are slow compared to some other motors.
I also have pushrod oiling in my motor with the hydro roller setup I am running.
Wrench I am from old school and running what the masters of the 60's ran. I do have an HVHP oil pump with 100# spring. The car does 98% of racing and a quick 2% on the street. It is better to have too much oil than not enough and burn up your motor. Been there done that, not on an FE.
The question above are important for the rockers. Ersons have needle bearings and need cool oiling. H&S, Dove and some of the others have bushing rockers or just aluminum riding on the shafts. In this case of aluminum rockers only, NO RESTRICTIONS. I have broken 2 rockers from Dove years ago with a .500" camshaft and 5,800 rpm limit.
.080" is a save number for 98% of all rockers and valve springs. T&D and Jesel setups have pushrod oiling and this is a whole different system. Rick L.