440 power gains/ aluminum head advantages?
when you say 3-4 degrees of advance is that from the lobe separation of. 108 or the recommended icl of 105. i know icl and lobe sep have no relation because one is the distance between the two cam lobe centerlines and one is just the position of the intake centerline but i want to clear some confusion for myself
In general, when talking about cam installed positions, I try not to reference it in terms of “advance” or “retard”, because often times not everyone is not on the same page wrt what “straight up” is.
For me, straight up is split overlap, which I view as the c/l for both intake and exhaust being the same.
So, they will be the same as the lsa.
As in, a cam with a 108lsa would have the intake and exhaust c/l of 108.
However, if the cam card showed an intake c/l of 104, some people would call 104 as straight up.
I would call it advanced 4*.
So, to avoid any confusion I prefer to call out the numerical position of where the cam is.
With the example above, I’d say, “it’s a 108lsa, installed at 104”, with no reference to being advanced or not.