Question about cams..... single pattern vs split

yellow rose said

Now that I read this again, I agree even more with you. You don't need to "crutch" the exhaust port. On the last cam I bought we didn't even discuss exhaust flow. The port is so bad, you can't fix it with anything other than a different head.

The spilt duration thing is a marketing tool.

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I disagree with this. BUT! Only to a degree.
A lot depends on the exhaust ports worth as well as the size of the engine. You should pay attention to the exhaust port flow. A little extra exhaust duration could, could help. I’m could, could hurt as well. I’ve seen dyno runs with single and split pattern cams. Engine dependent, one of them does better. There is a good argument for both.