IIRC, the nitrided layer is very thin. If that's worn through, then the softer untreated core is exposed and wears quickly.
Brad , I had the cam in my first 505 nitrided , block split then I went to build another . Pulled the cam to reuse , fark ! . Surface was heavily pitted . After talking to Mike Jones seems this is common . Nitride toughens the surface but can soften the under layer , so surface can collapse a bit like a sink hole . The lifters still looked like new .
New cam is not nitrided , got Howards edm lifters again .
I thought I was doing the right thing with nitriding but didn't work out . Could I go solid roller with a street profile ? Would make a bit more power , but just not sure I can get the street milage/usage . Especially the long highway driving . . Maybe use BAM lifters they seem to have a good name , Crower hipo ? Lot of $ to find out .
Tex
