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It is interesting that the big power-adders (Supercharging, Turbocharging, and NOS) all work on the principle of packing more oxygen into the combustion chamber. Turbo even does it at the detriment of exhaust flow, yet a big percentage of performance cams favor the exhaust side...

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Motors running nitrous want that exhaust valve opening pretty soon on power stroke to avoid overheating/detonation , hence the reason for the split........

I changed out the single for a split when i started running the bottle , basicly wanted the split pattern to behave pretty similar to the single pattern on the street , here's the two camshafts , notice overlap remains the same for the two cams as does IVC , only difference being EVO , these are the #s @ 050".

#1
270/270
112lsa
110icl
IO.25/IC.65
EO.69/EC.21

#2
270/278
114lsa
110icl
IO.25/IC.65
EO.77/EC.21

both had pretty similar street manners.