What is vtec e

VTC is always active and adjusting valve overlap for optimal engine efficiency and power at any given RPM. As you can imagine, combined the best of both world results in an incredibly efficient and powerful engine. The VTEC part of the system has two different camshaft profiles, one for low rpms, and one for high rpm. The VTEC part of the system allows valve overlap to be adjusted at any moment, resulting in much greater efficiency and slightly better performance.

At low RPM only one intake valve opens, which decreases fuel consumption, then at 2, rpm, it engages the second intake valve, allowing it to operate like a normal 16 valve engine. How the VTEC system increase horsepower may be slightly confusing, so let me break it down for you. To increase torque, you must let more air and fuel into the engine. If the valves must open further and for longer, the amount of air being sucked into the cylinder can be increased.

Since the camshaft spins half as fast as the crankshaft, it cannot be optimized for all RPM ranges. Having multiple camshaft lobes allows you to maximize lift and duration for various RPM ranges.

Since the camshaft is optimized for both high and low rpm ranges, it makes more torque in those ranges. More torque, especially at high RPMs, equals more horsepower. There is a lot of information to take in. I hoped this article helped you understand VTEC vs. If you learned something new, then be sure to share this with your friends and comment your thoughts below. Very good info I just have a question I have a 2. Its great to know that there are people willing with open hands so to speak to share information.

This is definitely encouraging. You guys gave me the info i needed to prove them otherwise. Good day mr duster im looking into a honda civic type r with mileage on it at a auction and a honda accord type s with mileage also at the same auction is it a good idea to get both cars reason i want to use the honda accord block on the honda civic type r do you recommend it or are the mileage to high please help so that I dont blow a hole in my pocket regards dylan meyer.

Currently you have JavaScript disabled. In order to post comments, please make sure JavaScript and Cookies are enabled, and reload the page. Click here for instructions on how to enable JavaScript in your browser. How Does it Increase Horsepower? Summary There is a lot of information to take in. A spring mechanism is used to return the pin back to its original position. One of the two cam-lobes are intentionally drawn to be different.

The one on the left has a "wilder" profile, it will open its valve earlier, open it more, and close it later, compared to the one on the right. VTEC uses the pin actuation mechanism to link the mild-cam rocker arm to the wild-cam rocker arm. This effectively makes the two rocker arms operate as one.

This "composite" rocker arm s now clearly follows the wild-cam profile of the left rocker arm. Note that each pair of cam-lobe and their corresponding rocker arms though adjacent, are spaced apart from each other.

The new middle lobe is the "wild" race-tuned cam-lobe. Using VTEC to link up all three rocker arms together, Honda is able to use either the mild or the wild cam-lobes at will.