The one thing I dont like about split duration cams is that the extra lift and duration isnt needed , alls its doing is mucking up the charge on overlap with the extra degrees of overlap.
Unless that extra overlap is needed to assist with scavenging {And probably not} its a waste of extra valve movement and duration IMO, for the most part. mike
& i always figured you were a split kinda guy.
There is know answer , every cam guy has differing views & will grind two different cams for the same application , some of these guys are pretty sharp , but not sharp enough to know exactly what cam that engine wants , the fast guys spend all there time on the dyno going through hundreds of cams , it's IMPOSSIBLE to spec the perfect camshaft for a given engine period.
