[White98LS]

I believe a long time ago I saw something like that, and the car made less power at the low end than with VTEC at the normal crossover. The mild cam profile isn't just for emissions and mileage - big cams typically make less power and definitely make the engine run more roughly at lower rpm. Folks like you and me with LS's with big cams don't really care so much about a bit of a rough edge at idle/low revs, but to the mainstream market this isn't acceptable. But at any rate, it's pointless to have a big cam at low rpm because it will generally make less power than a properly sized cam... if a VTEC-type system is already in place, it's best to use it.