---- Max Heim <max_heim@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@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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