How VTEC Works - Detailed Disassembly

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In this video, we look in detail at how Honda's vtec work, we look at every component from the rocker arms and pins to the vtec solenoid. we also disassemble every component to see how they function.
This is the most detailed "how honda vtec works" video!
VTEC stands for "Variable Valve Timing & Lift Electronic Control".. so VVTLEC or VTEC because that sounds better.
VTEC was developed in Japan by Honda to improve the volumetric efficiency and to produce more power with less displacement, this is due to Japanese regulations that taxes cars based on engine size, unlike the USA where more power was gained by increasing the engine size.

We use a PO8 sohc vtec cylinder head from a Honda D16Z6 engine in this video, however, in principle, the Honda K-series and B-series vtec systems work the same way with just minor differences in layout.
D16Z6, D16Y9, B16, B18 GSR (B20V) and the performance variations of K20 and K24 (F-series and H-series (H22 - H23) and even J-series also use the same vtec system just with a different layout.

Full Build Parts List
Stand Alone ECU (Dictator Standard) (RSA)
Stock D15Z4 Block / Stock D16Z6 Head / P2K Intake
63mm Custom Charge Pipes / Downpipe & Exhaust.
Xcell BOV / Internal Wastegate 7psi

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THIS is the definitive VTEC explanation; no one else has ever come close. 👌

dkiwi

Dude!! Very well made!! I wish you could go make mechanical training videos for the military and/or college.. Seriously, you have a gift for teaching with simplicity and demonstration my man.. I've always wondered how Vtec works..

thomasnicholas

This video has not been beaten even today imo. Most definitive video on vtec.
A little question, as i understand, once opened, the vtec path pressurize and lubricate the whole intake rocker shaft assembly.
The exhaust rocker shaft is lubricated through the small orifice in the middle of the head then through the camshaft cap.

But how is the intake rocker shaft lubricated when the vtec path is closed?

masterjack