[Mgs] MGB rear brakes

[Max Heim]

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