He's suggesting cam profiles with 114 degrees seperation. Looks like custom cam grind for this. Is there such a thing as too much cam for a turbo application?
Yes there is such a thing as too much cam,or more so incorrect camshaft specs.
Generally speaking ,you do not not too much overlap.
I like a wide lobe sepration of 115 or more for a turbo camshaft,for a general overall street car.
The newer LS engines have lobe separation of 120 or more like on the Newer Corvettes.
It all comes down to what you are hoping/want to get out of your vehicle,daily driver,max mileage,max performance & so-on.
MBHD