Ok guys, lets put this to bed once and for all:
VTEC/VVTLi/VVT etc does not make these engines you speak of make the power they make. Any alteration to cam profiles "on the fly" or cam overlap "on the fly" is PURELY a drivability and economy mod...i other words, it keeps the area under curve nice and fat, by pushing widening the range of revs the engine operates at or near peak VE.
vtec does NOT add power, no matter what any honda fan boy tells you. vtec is simply a small cam profile for low rpm, and a big cam profile for high rpm. if you go and put a set of big cams on your KL engine, you will have the same peak power potential.. you just wont have the same level of drivability. Personally I run a cam profile on my car that would make the vtec fan boys blush. Any of the guys running Honda motors seriously, actually DELETE vtec, so they are on a very large cam profile through the entire rev range.
achieving 100hp/L NA on the KLZE is pretty much a cake walk... the engine is a rev monster. Do some head work to deal with valve float, up the compression, balance the engine to support the RPM, get a set of tuned length headers (correctly made, custom designed), and run a tunnel ram intake manifold, and you will absolutely walk 100hp/L in...)
Information regarding just what is and is not required to get an engine to this level is available in the NA tech section, follow the link in my sig. I have done up a spreadsheet with the calculations for determining RPM and VE requirements for a given power goal.