[Fot] Oversize lifter bore

[Randall]

> The lifter size 
> is directly
> related to the lift of the cam lobe. 

I believe it's more the rate of lift that is limited by the lifter diameter
(for flat lifters).  It certainly is an important part of the cam design;
but the primary limitation is how fast the cam can move the lifter (per
degree of rotation) rather than how far.

Larry has a good description (with drawings) at
http://www.tildentechnologies.com/Technical/CamDesign.html

-- Randall