[DeTomaso] Clutch Pedal Reduction Kit with Diaphragm Pressure Plate?

[Joseph F. Byrd, Jr.]

I'll assume the long throw slave is a reduce bore to the original 1".  The
mechanical ratio of the MC to SC force and displacement would be the inverse
ratio of hydraulic bores.

The original would be ((0.75/2)^2/(1.0/2)^2)^-1 = 1.78:1

I don't know the bore of the long throw, but for aurgument assuming 3/4";
((0.75/2)^2/(0.75/2)^2)^-1 = 1:1

Thus the effort to push the clutch would increase 1.8 times

-----Original Message-----
From: B. SEIB [mailto:oldwheel at shaw.ca] 
Sent: Thursday, June 02, 2016 13:49 PM
To: 'Mike Drew'
Cc: 'Ken Green'; detomaso at server.detomasolist.com; davel at emspace.com;
byrdjf at embarqmail.com; will.kooiman at gmail.com
Subject: RE: [DeTomaso] Clutch Pedal Reduction Kit with Diaphragm Pressure
Plate?

Thanks Mike
I have been through all of that 600 miles ago. It's all new and/or well
lubed. Carefully assembled.
I think the long throw slave adds effort.
Barry 

-----Original Message-----
From: Mike Drew [mailto:MikeLDrew at aol.com]
Sent: June-02-16 12:40 PM
To: B. SEIB
Cc: Ken Green; <detomaso at server.detomasolist.com>; <davel at emspace.com>;
<byrdjf at embarqmail.com>; <will.kooiman at gmail.com>
Subject: Re: [DeTomaso] Clutch Pedal Reduction Kit with Diaphragm Pressure
Plate?

Barry,

Something often overlooked is the potential for friction caused by failure
of the bearings that support the 'clutch fork' that presses on the throw out
bearing. I know of one car that had very high pedal effort and investigation
revealed that those two bearings were seriously rusted. When you disconnect
the slave cylinder from the lever, the lever (and connected shaft) should be
free to move very easily. 

Mike

Sent from my iPhone

On Jun 2, 2016, at 12:32, "B. SEIB" <oldwheel at shaw.ca> wrote:

> Ken
> 
> I have a Centerforce Pantera diaphragm clutch. I have the effort 
> reduction kit and the Long throw slave in stainless steel.
> The pedal effort is still pretty fierce. I would say maybe 40-50 lbs 
> to depress. I'm thinking of going back to the stock slave cylinder 
> which will reduce pedal effort at the expense of less friction plate 
> clearance when depressed. I seem to have an abundance of that.
> 
> Barry
> 
> 
>
----------------------------------------------------------------------------
> -------------------------------------
> 
>  Given the mechanical characteristics of a diaphragm pressure plate, 
> does it make any sense to use a clutch pedal kit with one?  My 
> recollection is that the clutch pedal kit provides more leverage when 
> the pedal is fully depressed, but a diaphragm pressure plate does that
anyway?
> Ken
> -------------- next part --------------
>    Given the mechanical characteristics of a diaphragm pressure plate,
>   does it make any sense to use a clutch pedal kit with one?  My
>   recollection is that the clutch pedal kit provides more leverage when
>   the pedal is fully depressed, but a diaphragm pressure plate does that
>   anyway?
>   Ken
> 
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