TC's and manual trans (was: Re: Smooth strategy)

Gwyn Reedy mgr at mgrcorp.com
Tue Feb 2 01:02:49 GMT 1999


Take a WWII tank or a 40's Chrysler product with 'fluid drive' and you have
a fluid coupling with a standard transmission.

Gwyn Reedy
Brandon, Florida
mailto:mgr at mgrcorp.com

> -----Original Message-----
> From: owner-diy_efi at efi332.eng.ohio-state.edu
> [mailto:owner-diy_efi at efi332.eng.ohio-state.edu]On Behalf Of Greg
> Hermann
> Sent: Monday, February 01, 1999 6:19 PM
> To: diy_efi at efi332.eng.ohio-state.edu
> Subject: Re: TC's and manual trans (was: Re: Smooth strategy)
>
>
> >Shannen Durphey wrote:
> >>
> >> If you have any chances to roll around some of the car shows with well
> >> restored examples from the early 40's to late 50's, you'll see that
> >> the upper scale cars were designed to be very smooth.  In the
> >> transmissions, there were vacuum powered clutches, variable speed
> >> transmissions, standard trans with torque converters. Even
> >                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> >
> >Oooh!, the magic words.  I was just about to ask about this.  Can
> >anyone give me some info or point me to a source about torque convertors
> >and how exactly they work.  Are these tightly interdependant on an
> >automatic trans (because of the fluid used) or could they possibly be
> >used independantly?  I.e., adapted for use on a manual trans.
> >
> >Forgetting for the moment about the specific machiningg,
> adapters, etc that
> >would be required to physically hook it up, is it possible or feasible
> >to make it work outside of an automatic trans?  Is it's hydraulic fluid
> >supply sealed inside the convertor?  Could you fill the convertor and
> >seal it and expect it to work for very long or does it need a continuous
> >flow of fluid for cooling?  If so, would pressure need to be modulated
> >for any reason or does it just need a continuous flow?
> >
> >thanks for any info
> >--Dan
>
> Don't recall whatinell they called it, but for a while Porsche
> used a fluid
> coupling AND a vacuum operated clutch (which was triggered by a
> microswitch
> on the manual shift lever) in front of a manual tranny in the 911's. The
> fluid coupling ran in engine oil, IIRC. (A fluid coupling does
> not multiply
> torque, has only two elements, called pump and turbine.)
>
> Easiest way to think of how one works (at least for me) is to think of a
> centrifugal pump driving a centrifugal turbine--and then eliminate the two
> housings, and all the attendant weight and inefficiencies, by
> just wrapping
> the impeller and turbine wheels into a taurus shape, and mounting
> them face
> to face.
>
> Regards, Greg
>
>




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