[DeTomaso] Vadar Inboard Brakes for Pantera

[boyd casey]

I remember now . As ken said if you blow a universal joint you lose the
brake on that wheel.That was one off the major concerns brought up about
this setup when it was last discussed on the list. When I looked at Jaguars
many years ago ( I believe it was an XJ6 ) the rotors where right next to
the differential and the Jaguar staff  refereed to them as "In board brakes"
Vader claims that their 10.5 " rotor is the equivalent of having a 12.32"
rotor. They say with a 60/40 weight  distribution it would be the equivalent
of having a 15.75" rotor. They don't say how to get the 60/40  weight
distribution. By the time you incorporate the necessary cooling, the parking
brake and figure out how to get the 60/40 weight distribution who knows how
much it will cost and what you will have. Also won't removing 50 lbs of
sprung weight require changes to the springs and shocks?. With Ken Greens
help I have Brembo 4 piston calipers from a Porsche 911 Turbo.  They are dot
approved (unlike the Wilwoods) and I am able to use a 15.1" rotor so I don't
have to wonder about equivalent rotor size I have actual 15.1".  Is Vader
really delivering the promised 12.5" equivalent?  or would you have 10.5"
rotors that deliver 10.5" performance? The physics behind brake
effectiveness are based on the brakes ability to convert energy into heat
and dissipate it quickly. Brake fade is caused by brakes over heating and
not cooling quickly enough. That's one of the biggest differences between
brakes set up for racing and brakes set up for the street. Good street
brakes can stop a car quickly in a short distance but they can't do it
repeatedly because they can't dissipate the heat. The cooling problems
associated with the Vader setups location would give me serious concerns
about their usefulness in  a racing application (which is supposedly what
they are designed for.) . I don't have the numbers but I believe the Billet
riser and CV Joints ( of Ken greens riser / brake conversion) will provide a
weight reduction over the stock riser and the half shafts. Plus I will have
a better stronger bearing and can now remove my rotors with out the
necessity of having a special axle nut tool and  the bearing pressed out. As
an aside my 19" 10 spoke wheels would look strange with no brake caliper or
rotor showing. Since I am not building a race car I have to keep such
mundane things as "Looks" as part of the over all equation. Vader makes very
good looking products and I have no reason to doubt any of their claims. The
statements made are my opinion and are in part based on hypothesis not
facts.

On Fri, Jan 8, 2010 at 4:30 PM, GW <gow2 at rc-tech.net> wrote:

> I can see several ways of mounting a spot caliper. I don't see it as a
> difficult problem to overcome. This side mount could easily be adapted
> for one:
>
> http://www.rc-tech.net/pantera1/zfmount/zfm6.jpg
>
>
>
>
>
> JDeRyke at aol.com wrote:
> > In a message dated 1/8/10 12:07:59 PM, kenn_green at yahoo.com writes:
> >
> >
> >> I wonder if be a parking brake solution for brake upgrades?  Maybe even
> a
> >> light aluminum disk and a spot caliper would be enough for a parking
> >> brake?
> >>
> >>
> > I'd once thought about that, Ken. It would be easy to do- bolting rotors
> to
> > the inboard stub axle flange. But unless you modify the ZF case, maximum
> > possible rotor diameter is about 7-1/2" or thereabout before the rotors
> run
> > into the case front or the bellhousing. I was never sure this would give
> > enough leverage to hold tires on a hill with available mechanical
> calipers. I'd
> > also thought about adding Chrysler-type contracting-band e-brakes in
> there
> > somewhere. Chrysler used a single one on the driveshaft rather than two
> on the
> > axles, and it seemed to work, but it's heavy unless you make absolutely
> > everything from billet.
> > With Ted's setup, the rotors are outboard enough from the ZF case that
> Ted
> > says 10-1/2" max OD discs are possible, and one could easily add
> mechanical
> > calipers for parking brakes to his design. But as I remember, I got
> > discouraged by the conversion price of over $2500.... for a
> maybe-handling upgrade.
> > Sure looks pretty though; photos at <www.tmitch.com>   My 2¢- J DeRyke
> > _______________________________________________
> >
> > Detomaso Forum Managed by POCA
> >
> > Archive Search Engine Now Available at http://www.realbig.com/detomaso/
> >
> > DeTomaso mailing list
> > DeTomaso at list.realbig.com
> > http://list.realbig.com/mailman/listinfo/detomaso
> >
> >
> >
>
>
> _______________________________________________
>
> Detomaso Forum Managed by POCA
>
> Archive Search Engine Now Available at http://www.realbig.com/detomaso/
>
> DeTomaso mailing list
> DeTomaso at list.realbig.com
> http://list.realbig.com/mailman/listinfo/detomaso
>