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Re: Q for Techies: What is a vanos? (more) (archive)

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Posted by Matt on October 24, 2000 at 13:21:53:

In Reply to: Q for Techies: What is a vanos? (more) posted by JWR on October 24, 2000 at 12:05:07:

VANOS is an "enhanced" form of Honda's VTEC (don't remember the words for the acronym). It's variable cam timing. The reason you want variable timing is so you can take advantage of a rich fuel mix at low RPMs for lots of torque while still being able to advance the timing for better power on the high end. Honda's VTEC is not variable, it's an on or off deal. Double VANOS means variable timing on the intake and the exhaust, VANOS (what the US has currently until the new 3.2M engine debuts) is only variable timing on the intake.

What does it do? Do all engines have one (or more)? Why is a dual vanos better than a single? Thanks in advance.

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