The discussion centers on an 88 Monte Carlo racecar experiencing issues with rear braking after installing a 9-inch Ford rear end with disc brakes using metric calipers. The owner cannot use aftermarket master cylinders or proportioning valves due to track regulations, and attempts to solve the problem with a Corvette master cylinder have been unsuccessful. Participants suggest checking for hydraulic issues such as pinched brake lines or frozen caliper pistons, and emphasize the need for a suitable master cylinder that accommodates the car's weight and four-wheel disc brakes. Recommendations include contacting suppliers like Speedy Smith for production parts that comply with racing rules. The key challenge remains achieving adequate braking performance with the current setup.
