My view is that at certain times, the engine can take in more fuel and
air. More power, yes. Better fuel mileage, I don't think so. bob

Matthew Hunt wrote:
>
> In article <10474lehgvh649b@corp.supernews.com>,
> Al Smith <ecarecar@yahoo.com> wrote:
>
> > V-Tec gives an engine two cam shafts - a high speed and low speed cam shaft.
> > Each cam shaft is optimized for its own speed range.
>
> No, it gives the engine additional cam *lobes* for high engine speeds.
> There are both SOHC and DOHC varieties of VTEC, and on the DOHC variety,
> there's one shaft for the intake valves, and one for the exhaust valves,
> like a normal DOHC engine. There are low-speed and high-speed lobes on
> each camshaft.