DLC Lifters?

[Yellow71Cuda]

Does anyone have experience with DLC lifters regarding their ability to reduce what seems to be an increase in flat-tappet/camshaft failures over the past few years?

https://egnation.com/2023/01/24/dlc-lifters-provide-flat-tappet-protection/?fbclid=IwAR2e8vgrISVdth5QiMGk7MlYAmOWVU7tjwb-BV93MjiGJz2bfU--xa3WvsQ

[gzig5]

No direct experience with DLC.  My understanding is that the majority of the cam/lifter failures on HFT and SFT break-ins is not due to lack of lubrication but can directly be attributed to improper grinding of the lifter faces and/or improper taper angle on the cam lobes.  Lube is important but if these surfaces are not manufactured correctly, no amount of lubrication is going to fix it. The lifter face should have a slight domed or convex shape to it which in conjunction with the lobe taper, causes the lifter to rotate in the bore.  This dome also has to be centered on the face.  It can be difficult to inspect, but easy to test in the engine.  Turn assembled engine over by hand and all the lifters should rotate freely.  If they don't look for tight bore, or burrs, or obvious defects. If that doesn't correct it, send them out for refacing by someone that knows what they are doing.  I like the idea of DLC lifters and if I had high enough spring pressure might consider using them, but I am pretty confident that the lifter faces are the culprit in most cases.  My recent 340 build reinforced that with me with brand new Comp SFT lifters, several of which didn't spin and they all were reworked.