[HWYSTR455]

The Crower cam saver lifters have a groove down the side from the oil band down, which allows for more oil at the lobe. It's said it's 'nominal', the amount of oil it takes away, and they only recommend a high volume pump.

The cool face solids they say will show roughly a 2 - 3 psi oil psi drop. That one actually has a piddle hole on the face.

In general, to my knowledge, no, cams are not hardened after grinding a core. They are supposed to be hardened 'deep' enough to allow for the machining process.

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