Twin Centrifugals VS Single

[James Ballenger]

	How much does a centrifugal draw to run?  Why not just use a little CVT
appropriately sized and tuned?

James Ballenger

> -----Original Message-----
> From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> Behalf Of Eric Fahlgren
> Sent: Wednesday, April 18, 2001 8:11 AM
> To: diy_efi at diy-efi.org
> Subject: Re: Twin Centrifugals VS Single
>
>
> Walter Sherwin wrote:
>
> > Yes, unfortunately the response of a belt driven centrifugal unit is
> > proportional to the square of the impeller tip speed,
> together with a few
> > other minor influences.  It would be ideal to either: 1)
> vary the belt drive
> > ratio with respect to the crank speed [ala turbo's], or  2)
> oversize the
> > unit, within the impeller speed confines, and then dump the unwanted
> > manifold boost/flow via an intelligent dump valve
> controller [assuming a
> > blow-thru fuel configuration].
>
> My brother and I were just discussing this last week.  How about
> a hybrid of these two approaches?  Put a variable pulley on one
> end, with an tensioning idler to vary the ratio.  Use a controller
> to move the idler, deriving its control inputs from load, impeller
> RPM and boost.  The best of all worlds, low-end torque, high boost,
> high efficiency and a safety device.  Let me know when someone gets
> it running! :)
>
> --
> Eric Fahlgren                            Mechanical Dynamics, Inc
> efahl at adams.com                          Ann Arbor, Michigan, USA
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