Vtec what is it

As engine speeds rise, a piston inside the rockers is pressurized with oil, locking all three cams together to increase valve lift. This is where that signature "VTEC kicking in" sound comes from. Now next time you "get into VTEC" while driving your Honda, you'll know exactly what's happening inside your engine. Join Now. New Cars. Car Culture. Type keyword s to search. Today's Top Stories.

While VTEC retains the concept of variable valve timing throughout all of its variants, there have been a few changes made over the years. While VTEC was originally developed to take advantage of the power band at both ends of the rpm spectrum, Honda engineers quickly used the technology to create a variant dedicated to increasing fuel economy. While it also uses an oil pressure system activated via an electronic solenoid, it operates a bit differently than standard VTEC.

Effectively, the low rpm camshaft lobe profile virtually eliminates the use of one of the intake valves. When activated at higher rpms, the unused valves open fully. The result is lower rpm use, burning substantially less fuel thanks to the reduced air intake. VTC allows variation of the timing gear that drives the camshaft.

While the camshaft still only has two different lobe profiles, the variable gear timing allows for a middle ground between them by changing the valve timing overlap. With a low rpm setting, mid rpm setting, and high rpm setting, i-VTEC allows maximum control over engine power and efficiency. Alternatively, a VTEC equipped four-cylinder base model was available. For example, the Honda Civic Si , the second most performance-oriented model, features a 1.

However, the Civic Type R features a 2. It can be a bit of a challenge when shopping for a used Honda to determine what models do or do not have VTEC. If you are explicitly shopping for a model with VTEC, the best way to get a solid answer is to ask the seller or take a look under the hood. All of which are essential details when shopping for a used car. If you are in the market for a new or used Honda vehicle, the question as to whether or not you want an engine equipped with VTEC truly comes down to budget and preferences.

Whether you want a base model or the highest performance trim available, you can trust a Honda to get you where you want to go. What is it, and what models have it? Engine basics Gasoline-powered engines require four things to generate horsepower: Air, fuel, compression, and spark.

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