You guys don't seriously think that the cam is slamming into the base of the lifter on every revolution do you?
It rides on a film of oil, not metal to metal.
If you have metal to metal, there's a serious problem.
The lifter is also designed to rotate in it's bore are a result of the torsional forces to help prevent penetration of the oil film. A "flat tappet" is also not flat. It's convex. This is to facilitate the rotation of the lifter and to "point pressure" the oil film.
The old "muscle car myth" came form the time of
solid lifters.
Hydraulic lifters are a different animal, which is what the TBI engines are equipped with.
The only time there's potential for the lobe to impact the lifter base is at startup. And that's only if the entire oil surface has separated, at which point you have bigger problems.
Keep dumping in ZDP if you want, makes no difference to me.
I would rather know
why I was doing it though rather than I
heard it was a good thing.
You're not going to find that on the internet.
Anyways, I'm said my piece in this debate.
Enjoy the discussion.
