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@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]DeTomaso@server.detomasolist.com >[2]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. mailto:DeTomaso@server.detomasolist.com > 2. http://server.detomasolist.com/mailman/listinfo/detomaso
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@earthlink.net> To: Dave <davel@emspace.com>; detomaso <detomaso@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@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]DeTomaso@server.detomasolist.com >[2]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. mailto:DeTomaso@server.detomasolist.com > 2. http://server.detomasolist.com/mailman/listinfo/detomaso
From: Dave Sent: Jun 2, 2016 10:15 AM To: [1]detomaso@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
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
Detomaso Forum NO LONGER Managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list DeTomaso@server.detomasolist.com http://server.detomasolist.com/mailman/listinfo/detomaso To manage your subscription (change email address, unsubscribe, etc.) use the links above. Members who post to this list grant license to the list to forward any message posted 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 list messages. 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@earthlink.net> To: Dave <davel@emspace.com>; detomaso <detomaso@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----- plate, that
anyway? Ken
_______________________________________________
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References
1. [4]mailto:DeTomaso@server.detomasolist.com 2. [5]http://server.detomasolist.com/mailman/listinfo/detomaso
Detomaso Forum NO LONGER Managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list [6]DeTomaso@server.detomasolist.com [7]http://server.detomasolist.com/mailman/listinfo/detomaso To manage your subscription (change email address, unsubscribe, etc.) use the links above. Members who post to this list grant license to the list to forward any message posted 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 list messages. References 1. mailto:detomaso@server.detomasolist.com 2. mailto:DeTomaso@server.detomasolist.com 3. http://server.detomasolist.com/mailman/listinfo/detomaso 4. mailto:DeTomaso@server.detomasolist.com? 5. http://server.detomasolist.com/mailman/listinfo/detomaso 6. mailto:DeTomaso@server.detomasolist.com 7. http://server.detomasolist.com/mailman/listinfo/detomaso
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