Does this prove David Vizard's 128 lsa formula ?

Bewy said

Ant,
Get DVs SB Chevy book, SA books #57. Money well spent.

It has a couple of pages of cams, hyd & solids, FTs & rollers, from mild to wild, for various engine sizes. It gives LSA & duration for these cams & you will be able to make an INFORMED decision on a cam for your engine.

I believe 273 touched on this earlier & I am not sure if it is in this book or his BBC book: if you want more low end or smoother idle, do NOT widen the LSA, reduce the duration.

Click to expand...

I plan on purchasing a few books by multiple authors when I get the chance. This will expand my knowledge further and I will have multiple sources to compare and contrast.

As for the cam LSA, DV's 128 formula thing kind of goes against what I have learned in the past. Usually too short LSA is bad for vacuum and very low end power is what I've learned and has been the opinion by many others. Is it right? IDK. Most of my experience is dealing with factory stock stuff, but learning more about high performance stuff is fun.

Edit:
(Those options I heard by the many others past were somewhat incorrect.)

BTW, quote me when you reply to me. This way I get the notification. :)