Dual pattern Cam vs. Single pattern Cam
I've just been wondering recently about these two style camshafts. I know what they are (single cam being like mine 224/224 @ 0.050, dual pattern 222/234 @ 0.050).
What is the advantage of one over the other and how would you know if you needed one over the other. Aren't dual patterns for weak exhaust valves or something?