I am very interested in all this as I have several HFT camshafts (un-used) in the their boxes on my shelf. The DLC coating on lifters especially interests me. Nitriding the cam sounds good too. I found on Don Terrill's Speed Talk some info about nitriding camshafts that seems good to be aware of if you have DLC lifters. To quote:
".When you nitride a cast iron cam, the process reduces the core hardness of the material. You end up with a very hard, but thin outer layer, but the backing material is now much softer. The hard shell. helps with break-in, but the after a while the softer backing material gives way, and the hard shell starts to flake off. As soon as that starts, your cam is toast."
To me it sounds like do DLC on lifters OR do nitriding on camshafts but not both. Then there is the cryogenic process that can be done on cams, would this synch with DLC coated lifters?
What do you all think about all this? Thanks!
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