Intake runner sizing..

[werner at tij.wb.xerox.com]

>>>>> "JS" == Jim Sturcbecher <jsturs at bart.nl> writes:

    >>  Variable intake length would be fun...

    JS> this sounds like a great subject for a project. Let's see,
    JS> sliding tubes driven by a servo motor linked to rpm
    JS> sensing... hmmm might work, if only I could work out how to
    JS> fit all that plumbing under the hood.

Why use RPM sensing.  The tuned length should change with air temp,
pressure, etc.  I thought about this about 4 years ago, but never did
anything with it.  What you really want to try to do, as I understand
it, is to achieve the highest pressure at the intake valves.   This
will force more air in quicker.  To do this, why not just sense the
pressure, and adaptively control the tube length to maximize the
pressure?


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