Re: MPI Manifold

From: N2mopars@aol.com
Date: Tue Oct 26 1999 - 23:02:52 EDT


In a message dated 10/26/99 7:54:32 PM Pacific Daylight Time, Mtbfed@aol.com
writes:

<< Jon, that is not a bad idea at all. As a matter of fact my wifes VR6
powered
 VW Passat has an intake manifold as you discribe. never had it apart though
 to see how it works. Maybe check out some VW mags. to see how they do it.
 But there is an electric motor that alters the runner length...
>>

Mazdas also do this. They use vacuum to conrol the runner opening. Or lack
of vacuum. At idle, vacuum is high, pulling on diaphrams, which (hooked with
 linkage) pull the secondary throttle plates closed. As rpm goes up, vacuum
goes down, releasing the secondary plates. Really cool setup.

Brad



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