I would start by looking at oil flow. Friction is what eats up a cam so why is there so much more friction on yours? Maybe low oil flow to the lifters.
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Those cam lobes are soft, they wore, not a friction/lack of oil issue. Also, one thing I caught in your comment was that the cam was a new billet reground. I find that curious in that Melling offers a MC803 camshaft and the specs are lower than your indication. There is no way to re-grind a camshaft and make the lobe taller, it has to be welded. And that is where the issue comes in, it isn't as hard as it was new. Heat treating is too often over simplified. It is a very exacting process to achieve the desired results. You can't just heat something up to cherry red and quench it and think you've done the job is what I'm getting at.
[QUOTE="Splangy" That's simply not true. You can certainly give the cam more lift by grinding part of the lobe.
[QUOTE="cuencanolenny, I see what you are proposing there, however, camshafts are castings and the lobes are surface hardened. Grinding this much risks not leaving much, if any, of the surface hardening in place. But I'll take your word for it that Delta has a process in place to address the issue. I would prefer to leave that portion alone, it isn't a race car.
The same process/geometry would apply to regrinding a worn cam to stock. Mine was worn beyond spec and they said they had to see it to evaluate if it could be saved. I sent the cam, lifters and a note describing the engine and use. I told them the F.5 was de-smogged with a new Weber 32/36 and I drove with too big of tires for my gearing and only drove around in the swamp mud in mostly 1st sometimes 2nd at low rpm & speed. I called them after a week to see if they evaluated it. They said it was done and just shipped out. "What" I said. I thought we were going to discuss it. "We did" he said. "In your note". We gave you a 205-S grind and resurfaced the lifters. It was reasonable $ and I slapped it in. The difference was quite noticeable. More pull at low rpm. It's been in a few years and how it's holding up I just don't know. The last time I had the valve cover off the valves needed no adjusting and the push rods were still rotating on their own. But I guess time will tell. For me and for the price it was a good move.
Well.... I loved it for some years with the Weber 32/36 for the way I use it in the swamp. The low end grunt helped make up for me being over geared with the 39.5 x 15 Swampers. It still did good when I went to a Trollhole carb and then onto the Sniper. But, I now have a problem which I'm about to explain in a thread I'll be posting real soon. I'll title it "Cam & Lifter Woes.205-S? Or 250-S?
Sorry, 250-S
How are you liking it after a few years?