No power drum brakes???

shep76 said

Does the brake cylinder bore size have any impact? I see options for 13/16" and 15/16" bore size for the brake cylinders.

2nd question: Why are there different master cylinders for 9" and 10" brakes but the bore size is different. MC36338 says it is for 9" brakes....

Click to expand...

The theory it is the Fulcrum and the Lever.

Moving the Fulcrum farther away from the lifting point increases the lift range and it takes more exerted effort to lift it. > Larger Cylinder Bore.

Moving the Fulcrum closer to the lifting point decreases the lift range, but in turn decreases the required exerted effort to lift (move) the work. > Smaller Cylinder Bore.

The smaller cylinder bore will have a longer stroke but an easier more controlled push on the brake pedal.

Smaller diameter brakes in theory use smaller wheel cylinders, so requires less fluid pumped to actuate the brakes.

B Bodies have larger diameter brakes, so they originally came with the larger diameter bore masters.

All else fails call Dr. Diff as he has working solutions available.

☆☆☆☆☆