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If you look at the top screen shot, you can see the cam is installed on a 111 ICL and if you look real close, you can see the overlap “triangle” is centered around TDC. This is also called split overlap, but that isn’t always correct.
If you look at the bottom screen shot you can see it’s installed at the 108 ICL and the overlap triangle is advanced (moved to the left on the graph) and IMO, when you do that, you compromise the very thing that overlap helps accomplish.
If installing the cam with overlap centered loses power IMO you have the wrong cam and advancing the cam is a crutch to fix an issue with the timing events.
