I read up on it someware.. i swear it lets in more fuel...

 

maybe lets more air into the chamber and more fuel is needed at that point. im not sure if its intake cam or exhaust cam or both that kick

 

This is what i read... there is like a restrictor that limits the amount of fuel going into the engine at a "cruising rpm" after you pass this it opens up fully. Basically making the time it takes to get to redline... longer lol

 

that is not true. yes the car is better on gas under the vtech but the car is pretty quick an SI civic coupe will toaste a Non turbo eclipse I actually got owned by a Si coupe in my V6 spyder eclipse they are not slow cars but they arnt fast either. The vtech kicks and probaly adds fuel more to ramp up the rpms quicker for an agressive cam. I am not at all research into honda motors or valve timing but I really dont think Vtech is just a feul map that is economical vs aggressive otherwise no other car company would borrow the idea and use it in there cars especially the EVO a car that lives off of its fuel burn

 

hmmm http://videos.streetfire.net/search/...E74118BB4A.htm this makes a lil more sence

 

ya that is a good video. I knew is was something with the cames and valve timing but in essence I suppose if you are oppening intake valves longer you are bringing in more air and at that point a little more fuel must be needed to keep the AFR the same unless they run a diff AFR at 4500+ RPMs