zottlander
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Pulled the engine(had 140,140,160,142 compression) Turns out the cam was having a lifter or two for lunch. I had a kent cam with .381 or .377 lift. the guy over at TNN that wrote the great ref. stuff says .29 and above wears the guides. My machine shop guy says that .381 is a lot of lift for a baby engine. I noticed on Paul's site that TT has the most conservative cams. I think the biggest in that column was .302(for race) I will use a less agressive cam in the rebuild. The previous owner had the block line bored for cam bearings so those will be also replaced. I wonder if the dual springs also cause some lifter wear? The lifters were battered, one was concave, a couple had pitting. I am
putting in pilot lifters and thinking about nitriding the cam shaft. Do you guys have any opinions on nitriding rings? thanks....
putting in pilot lifters and thinking about nitriding the cam shaft. Do you guys have any opinions on nitriding rings? thanks....