Is there a SOHC VTEC?

SOHC VTEC is a power implementation of VTEC for SOHC engines with the express intention of extracting high specific output. SOHC VTEC engines are high specific output forms of the standard SOHC engines. The D15B engine used in the Civic/Civic Ferio VTi models (EG-series 1991 to 1995) gives 130ps from a 1493cc capacity.


There is actually a very large difference between the two. The SOHC VTEC only has the variable affect on the intake side (there is only so much room on a camshaft). A DOHC VTEC has VTEC on both the intake and exhaust cams.

Is VTEC twin cam?

The VTEC system uses two (or occasionally three) camshaft profiles and hydraulically selects between profiles. It was invented by Honda engineer Ikuo Kajitani.

What is special about VTEC engines?

The VTEC system uses two camshaft profiles and hydraulically selects between the two. The incredible feature of this technology is that the engine can have the low-speed and high-speed camshafts in the same engine. In fact, the main idea with Honda i-VTEC is to have the maximum engine performance at every RPM range.

Which is better i-VTEC or VTEC?

Intelligent Variable Timing (and lift) Electronically Controlled (iVTEC), is a system that combines VTEC and VTC into one unit. The VTEC part of the system allows valve overlap to be adjusted at any moment, resulting in much greater efficiency and slightly better performance. …

Why does Honda still use SOHC?

The biggest reason to use them is because DOHC engines are more expensive to produce (which price would get pushed back onto the consumer), there are more moving parts in them (which means they will fail sooner), and they can still do VTEC in either version.

How does VTEC work in a Honda engine?

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.

What’s the difference between VTEC and SOHC engines?

VTEC is a Honda trademark, and SOHC is a single-cam engine (Single OverHead Cam).

What kind of valve timing does a VTEC engine use?

The VTEC system provides the engine with valve timing optimized for both low and high RPM operations. In basic form, the single cam lobe and follower/rocker arm of a conventional engine is replaced with a locking multi-part rocker arm and two cam profiles: one optimized for low-RPM stability and fuel efficiency,…

What kind of VTEC system does the are series engine use?

The i-VTEC system in the R-Series engine uses a modified SOHC VTEC system consisting of one small and two large lobes. The large lobes operate the intake valves directly while the small lobe is engaged during VTEC.