valve overlap

[Walter Sherwin]

>I'm not sure about 'negative' overlap, but I'll assume they are referring
to
>less overlap.


Thank-you Jim!  That's exactly what I was wondering to myself, whether there
actually were cams with zero, or negative, seat-seat overlap timing.  I am a
HUGE fan of Crane's HIR series (Hydraulic Inverted Flank Roller) camshafts,
with speed density EFI.  They have much "reduced" overlap, and achieve much
of the aforementioned potential, but don't actually utilize true "zero" or
"negative" overlap numbers.   I love reading the list stuff, and pondering
the possibilities!

Walt.