Quote:
Originally Posted by 65signet
I use non coated tool steel lifters with a cast core cam for years.
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Yep. Sold a few dozen sets. The trick for many engine builders was to break in the camshaft using Shubeck lifters, then put tool steel lifters in.There's another brief break in required there, but once the Shubeck lifters burnish the cast iron cam, the tool steel lifters will break in and run reliably, with good quality oil.
You cannot, under any circumstances, run DLC coated lifters on cast iron core camshafts. I know one lifter supplier told people you can, and it was disastrous. Cast iron is by nature abrasive, and DLC simply will not live on it.