Cam comparison

RRR,
I should have been more specific. I was responding to an earlier post that claimed the exh note was determined by LSA...no mention of other aspects of valve timing.
You can get a cam with 102 LSA, 185* @ 050 , & it will have a smooth idle & not have a rowdy exh. Use the same 102 LSA but increase duration to say 230 @ 050 & it will have a very rowdy exh; increase the exh duration on the last cam by another 15* & the exh will get even raspier....because overlap has increased.
The above was one of David Vizard's tenets: if you want a smoother idle & more low end, do NOT increase LSA, instead reduce duration.
DVs SB Chev book has 3.5 pages of Lunati cams with part #s, with 6 or 7 categories, from mild to wild...
The mildest category, Street & Tow has the same duration for engine sizes 302 through to 434 [ stroker ]. What differs is the LSA: 110 to 104. The duration @ 050 is 199*.
From Street & Tow to the other extreme is Real Race. Same LSAs but more duration 244 & 050
The LSA & duration can be used to vary the overlap, but both will change the overlap.