<VV> metallic brake shoe - self adjusters

[Frank DuVal]

That does make sense, but I never experienced any problems running with 
self adjusters and Velvetouch brakes.

The "no stop when cold" was very noticeable in the Corvair. Not 
disturbing, but noticeable for the first stop or two leaving the house 
in the morning.

This cold effect is not noticed with the 1970 Buick wagon. That 4400 
pounds gets the shoes hot the first stop out of the driveway even in 
freezing weather! Note, car does not have power brakes! Metallics make 
the car stop much shorter than organics.

Frank DuVal

On 1/8/2011 11:53 PM, Sethracer at aol.com wrote:
>
>
> In a message dated 1/8/2011 1:51:23 P.M. Pacific Standard Time,
> NeighborDave at roadrunner.com writes:
>
> Lonzo  and Others,
> Why remove self adjust mechanism when installing metallic brake  shoes??
> Dave Foster
> 63 Spyder
>
> Dave -
>
>
> It was recommended to remove the self-adjusters when installing the true,
> metallic shoes. The metallic shoes have an attribute that the standard shoes
> do  not have. When they get hotter, they become more effective (at least
> until some  very high temperature point). It is a given that shoes, when
> "powered" by self  adjusters, will adjust themselves out until there is some,
> small, contact point.  That point of contact will be less effective than the
> vast majority of the shoe.  So when you apply the brakes, most of the shoe
> will be fresh and ready to stop  the car, even if one side, and even if one
> end, has a little less friction,  because of that small drag. With metallics,
> that little contact will make that  point MORE effective. Until they get
> fully warmed up, that small patch of very  effective contact will cause a pull
> in one direction, or another, since it will  never be exactly equal on both
> sides. If adjusted manually - and correctly -  both shoes should hit the
> drums with full force, and at the same time, when the  pedal is pushed.
> Metallics also have the reputation for not much help with  stopping until they get a
> bit warmed up. The installation instructions I have  seen have that
> warning. Back out of your driveway carefully in the morning,  unless you want to
> back up your neighbor's driveway across the street.
>
> For racing, it doesn't matter much, because you will be warming up your
> brakes on the installation or pace lap. After the brakes get nice and warm,
> the  small drag point won't be a problem, and probably not noticeable.
>
> At least, that is the theory!
>
> Seth Emerson
>
>