Having run hundreds of tests on the. effect of 2-valve throttle body upgrades on everything from stock to supercharged combinations. (both centrifugal and positive displacement), it is safe to say that throttle body upgrades on the 2-. valve motors are a worthwhile endeavor.
VDC may refer to: In technology: Virtual design and construction, modeling software and techniques to design and evaluate possible construction processes; Volts of direct current; Video display controller, a computer graphics chip; Vehicle Dynamics Control, a means of increasing vehicle stability through a combination of throttle restriction and braking
VDC is an abbreviation fot volts DC.. DC stands for direct current, which means the voltage is constant (as opposed to AC, alternating current, in which the voltage is constantly oscillating between positive and negative polarity). And a note about the term direct current: don't think too much about what the words actually mean.