You MUST use new or reground lifters with a new cam.
IMO, I would never use either new or reground lifters w/o having them
Rockwell tested for hardness before using them.
If your lifters are stock, I would regrind and Rockwell test them.
There are lots of soft lifters out there. I would not trust anyone.
Rockwell hardness test them.
Try www.Integralcams.com There are other places I'm sure. I had my TR250
original lifters reground and tested there. I've not installed them yet.
Integral supplies Kent Prather racing Team with Cams and Kent speaks
highly of Integral Cams (I asked him) -- good enough for me.
Don Malling
Larry Colen wrote:
> When you replace a cam, do you need to also replace the tappets? Or,
> if they are still good, can you just go with the old ones? I've heard
> some talk of tappets wearing in, but I don't know how much of that is
> reality and how much is superstition.
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