Cam comparison

Bewy said
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.

That be me and….. that first sentence also applies to me.
However….

Bewy said
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.

Good addition to the thread. To include everything and the parts that need an adjustment, addendum as well as nuances to camshafts, the post could get super lengthy.

I want an extended personal thanks for that post and what you said within it to mine and the camshaft writings. The valve timing is super important should anybody care to make the best of what they’re doing. It’s not easy to quickly explain such things. Especially if someone wants details and wants to slice things up and pick them apart. This is one of the reasons why I don’t suggest cams anymore. Everybody has their opinion on what to someone should wear, what they should be drinking just like what intake, carb, air cleaner, etc….

Many people that make a camshaft suggestion can have a merit, but, it doesn’t always fit exactly what the person wants to do or what they’re looking for. Like everybody else here I can make some generalizations and simple suggestions I can’t make anything exact. In short, there’s always a better camshaft.
The challenge is to get the best one for you.

Again I like to make a public “Thank You” to Bewy.
Camshafts can be super complex. Never mind an internet board selecting the right one for you. Call up the various camshaft grinders and they even come up with different grinds. Call 10 grinders, get 10 different answers.