Disc vs. Drum

For a drag only car drums have 2 slight advantages:

1. The shoes can be adjusted back for zero contact and therefore no friction.

2. A 9" drum has less rotational mass and will accelerate faster.

If you only have to slow the car down once an hour or so, in annice flat dry shutdown lane drums are OK. In traffic they are inferior.

I've never figured out why somebody will spend $5000 on a paint job, $10,000 on an engine and cheap out by refusing to spend $200 on decent brakes.