[DeTomaso] twin disk street clutches

Mad Dog Antenucci teampantera at yahoo.com
Mon May 12 23:16:45 EDT 2008


Come on now slacker.... when you only use 115 of the 615lbs/ft of TQ its no wonder you don't have a problem ;-]>

forestg at att.net wrote: I have the same clutch that was on the cleveland which is the 10 1/2" centerforce from Hall. Remember though that I don't drive like Mad Dawg and I only have 615 lbs/ft of torque.
Forest
-------------- Original message from adin at frontier.net: -------------- 


> I guess it would be too simple to call Don B and ask what clutches are 
> used in the big motors. 
> 
> Forrest???? 
> 
> 
> 
> 
> 
> Quoting JDeRyke at aol.com: 
> 
> > FWIW- the biggest single reason NOT to use multi-disc clutches in a Pantera 
> > is, you simply cannot get enough clutch linkage travel to disengage 
> > two  discs; 
> > we can barely get enough to disengage one. Consider: on a given Pantera when 
> > checking thru the access hole in the bellhousing, you'll only be 
> > able to get a 
> > 0.040" thick feeler gauge (if you're lucky!) between a single disc and 
> > flywheel. This means that each side of the clutch disc only clears 
> > the pressure plate 
> > AND flywheel by a max. of 0.020" each- and those discs aren't perfectly flat, 
> > so we get 'some' clutch drag. 
> > Using dual discs with 4 friction surfaces, the clearances are reduced to 
> > 0.010" per disc per surface. Massive and expensive wear on ZF sychronizers 
> > results, unless huge changes are made in the slave cylinder bore 
> > and/or the pedal 
> > ratio under the dash. On racing versions, this is taken care of by 
> > rebuilding the 
> > tranny after each event. Changing  pedal ratios is difficult due to the 
> > tight clearances to the floor, while making the slave smaller to get 
> > more travel 
> > causes an impossibly stiff clutch for any sort of street driving. Again, it 
> > doesn't affect racers 'cause not much shifting is done in a typical 
> > event. But in 
> > traffic- forget it! You'll be finding excuses to NOT take such a Pantera on 
> > club runs and it turns into a dedicated racer. 
> > Maybe a power-clutch setup would make all this possible but it certainly 
> > ain't gonna be a bolt-in; possibly some extra bracing under the dash will be 
> > needed. Personally, I'd go to a clutch specialist shop and have a single-disc 
> > pressure plate custom-made to my best-guess strength needed, and try 
> > it out. It may 
> > take a few assemblies to both allow street driving and holding 2X the stock 
> >  torque, but all this will pay off in le$$ ZF overhauling. FWIW, 
> > street pressure 
> > plates are around 2000-lb units while 'racing' clutches are 2600-lb and will 
> > shorten your leg in a few hours of traffic! Good luck- J Deryke 
> > 
> > 
> > ************** 
> > 
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Mad Dawg Antenucci 
Team Pantera Racing 
  The 1st & still the only vintage race team in open road racing 
www.teampanteraracing.com



Mad Dawg Antenucci 
Team Pantera Racing 
  The 1st & still the only vintage race team in open road racing 
www.teampanteraracing.com



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