[Mgs] MGB rear brakes

[melfrankus at carolina.rr.com]

---- Max Heim <max_heim at sbcglobal.net> wrote: 
>I replaced the rear wheel cylinders on My 71 MGB GT several years ago. The parts vendor, Proper MG, catalog did not make a distinction between the part for the B roadster and GT.  The ones they sent were for the roadster only.  Then they sent the proper wheel cylinders.  As I recall, they were both virtually the same size, but the attachment holes were spaced differently...Mel




 s
 I am inclined to agree with your thinking. For instance, truck rear wheel
> cylinders are often larger than a similar-sized passenger car, for the
> reason you state -- to apply proportionally less shoe motion per inch of
> pedal travel to the rear brakes, to avoid rear wheel lockup when unloaded.
> 
> In an example from another genre, people that upgrade the rear axles in
> Mopar A-bodies (to 8.75 from 7.25 ring gear) often compensate for the larger
> rear drums (to 10" from 9") by fitting Dodge truck rear wheel cylinders (to
> 7/8" from 3/4").
> 
> By that logic, the rear-heavy MGB-GT should have had SMALLER diameter rear
> wheel cylinders. On the other hand, the nose-heavy MGC may have had larger
> cylinders. 
> 
> Were those MGC-GT rear cylinders, possibly?
> 
> 
> 
> on 2/23/09 12:03 PM, Norm 2Bs at twobees at sprynet.com wrote:
> 
> > It has been 2 years since my MGB & I parted company.  But, if my failing
> > memory serves me right, I used the larger GT rear cylinders on my '66
> > roadster BECAUSE I raced it.  The theory was, the master puts out x-volume
> > of brake fluid.  A larger wheel cylinder is moved less given that volume.
> > 
> > As I said, I'm no longer certain of that.  But, in the years I raced the B,
> > I never had problems with over-braking at the rear - neither on the track or
> > on the street.  Only time I remember locking up was in Turn 1 at The Glen.
> > Then all 4 locked up.  Generally, I could out-brake almost all of the cars
> > in my race group with that setup & Hawk pads on the front & metallic shoes
> > on the rear.
> > 
> > Norm Sippel
> > '59 Turner
> > '60 Alfa
> 
> 
> 
> 
> --
> 
> Max Heim
> '66 MGB GHN3L76149
> If you're near Mountain View, CA,
> it's the primer red one with chrome wires
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