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

[jderyke at aol.com]

I had much the same result when we replaced Scott Mead's 3-finger clutch for a diaphragm clutch at a So-Cal Tech session. That was a decade or so ago and as far as I've heard, Scott has yet to experience clutch slippage. Note there are two different kinds of diaphragm clutches- straight finger and bent finger, and the both take a specific throwout bearing for best results. THere are also several strengths and a heavy diaphragm clutch is still hard to push. Beware of "race' units. 
FWIW- J Deryke

 

 

 

-----Original Message-----
From: thells <thells at earthlink.net>
To: Dave <davel at emspace.com>; detomaso <detomaso at server.detomasolist.com>
Sent: Thu, Jun 2, 2016 11:08 am
Subject: Re: [DeTomaso] Clutch Pedal Reduction Kit with Diaphragm Pressure Plate?

A couple of years ago I replaced a 3 finger 'HAYS' type clutch in my
   '72 with a McLeod diaphragm type pressure plate and disk along with a
   new throwout bearing all from Steve Wilkinson. At the same time I also
   added an effort reduction kit from Bob Byars, this one has roller
   bearings and is a nice improvement from the stock one which uses bare
   metal as the bushing surface.
   The old clutch took a significant effort to use, I'd guess the force
   was somewhere in the 50 - 60 lb range. Not much fun in SoCal traffic.
   With the new diaphragm clutch and the kit I can now push the clutch
   pedal to the floor with my hand. I'd estimate the force required to be
   around 15 lbs, it's as light as a Honda clutch.
   I can't speak to any other brands but the McLeod diaphragm clutch from
   Wilkinson and the Byars effort reduction kit provided a significant
   improvement over the old 3 finger clutch in my car.
   Dan

     -----Original Message-----
     >From: Dave
     >Sent: Jun 2, 2016 10:15 AM
     >To: detomaso at server.detomasolist.com
     >Subject: Re: [DeTomaso] Clutch Pedal Reduction Kit with Diaphragm
     Pressure Plate?
     >
     > I can give you a measured result Ken.
     >
     > With no kit and a dual surface Centerforce:
     >
     > - I don't notice it when road driving
     > - about 20 mins of rush-hour bump&go is OK.
     > beyond that I have to spend as much time in neutral as I can
     manage.
     >
     > Dave
     >
     >
     > On 6/1/2016 8:50 PM, Ken Green via DeTomaso wrote:
     >
     > 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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-------------- next part --------------
   I had much the same result when we replaced Scott Mead's 3-finger
   clutch for a diaphragm clutch at a So-Cal Tech session. That was a
   decade or so ago and as far as I've heard, Scott has yet to experience
   clutch slippage. Note there are two different kinds of diaphragm
   clutches- straight finger and bent finger, and the both take a specific
   throwout bearing for best results. THere are also several strengths and
   a heavy diaphragm clutch is still hard to push. Beware of "race' units.
   FWIW- J Deryke

   -----Original Message-----
   From: thells <thells at earthlink.net>
   To: Dave <davel at emspace.com>; detomaso
   <detomaso at server.detomasolist.com>
   Sent: Thu, Jun 2, 2016 11:08 am
   Subject: Re: [DeTomaso] Clutch Pedal Reduction Kit with Diaphragm
   Pressure Plate?
   A couple of years ago I replaced a 3 finger 'HAYS' type clutch in my
   '72 with a McLeod diaphragm type pressure plate and disk along with a
   new throwout bearing all from Steve Wilkinson. At the same time I also
   added an effort reduction kit from Bob Byars, this one has roller
   bearings and is a nice improvement from the stock one which uses bare
   metal as the bushing surface.
   The old clutch took a significant effort to use, I'd guess the force
   was somewhere in the 50 - 60 lb range. Not much fun in SoCal traffic.
   With the new diaphragm clutch and the kit I can now push the clutch
   pedal to the floor with my hand. I'd estimate the force required to be
   around 15 lbs, it's as light as a Honda clutch.
   I can't speak to any other brands but the McLeod diaphragm clutch from
   Wilkinson and the Byars effort reduction kit provided a significant
   improvement over the old 3 finger clutch in my car.
   Dan
   -----Original Message-----
   >From: Dave
   >Sent: Jun 2, 2016 10:15 AM
   >To: [1]detomaso at server.detomasolist.com
   >Subject: Re: [DeTomaso] Clutch Pedal Reduction Kit with Diaphragm
   Pressure Plate?
   >
   > I can give you a measured result Ken.
   >
   > With no kit and a dual surface Centerforce:
   >
   > - I don't notice it when road driving
   > - about 20 mins of rush-hour bump&go is OK.
   > beyond that I have to spend as much time in neutral as I can
   manage.
   >
   > Dave
   >
   >
   > On 6/1/2016 8:50 PM, Ken Green via DeTomaso wrote:
   >
   > 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
   >
   >
   >_______________________________________________
   >
   >
   >Detomaso Forum NO LONGER Managed by POCA
   >Posted emails must not exceed 1.5 Megabytes
   >DeTomaso mailing list
   >[1][2]DeTomaso at server.detomasolist.com
   >[2][3]http://server.detomasolist.com/mailman/listinfo/detomaso
   >
   >To manage your subscription (change email address, unsubscribe,
   etc.) use the li
   >nks above.
   >
   >Members who post to this list grant license to the list to forward
   any message p
   >osted here to all past, current, or future members of the list.
   They also grant
   >the list owner permission to maintain an archive or approve the
   archiving of lis
   >t messages.
   >
   >References
   >
   > 1. [4]mailto:DeTomaso at server.detomasolist.com
   > 2. [5]http://server.detomasolist.com/mailman/listinfo/detomaso
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References

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