(intelligent-VTEC)
Valve lift and duration are still limited to distinct low- and high-RPM profiles, but the intake camshaft is now capable of advancing between 25 and 50 degrees (depending upon engine configuration) during operation. Phase changes are implemented by a computer controlled, oil driven adjustable cam gear. Phasing is determined by a combination of engine load and rpm, ranging from fully retarded at idle to somewhat advanced at full throttle and low rpm. The effect is further optimization of torque output, especially at low and midrange RPM.
VTEC (Variable Valve Timing and Lift Electronic Control)
is a valvetrain system developed by Honda to improve efficiency, This system uses two camshaft profiles and electronically selects between the profiles.
An intercooler, or charge air cooler, is an air-to-air or air-to-liquid heat exchange device used on turbocharged and supercharged internal combustion engines to improve their volumetric efficiency by increasing intake air charge density through isochoric cooling. A decrease in air intake temperature provides a denser intake charge to the engine and allows more air and fuel to be combusted per engine cycle, increasing the output of the engine.
Source(s):
http://en.wikipedia.org/wiki/Intercooler
The minimum operating speed (generally measured in revolutions per minute, or rpm, of the crankshaft) of a combustion engine
