So to return to this topic,the amount of wt transfer that occurs varies given the type of braking being done.Where rear disc brake conversions fall's short is the greater amount of pressure needed for rear disc brakes to operate correctly vs's the balance needed front to back.It is very hard to judge volume vs pressure.Some rear dics systems require a larger brake master and line size.

The issue is if you have a adjustable proportioning valve set to panic stops,it doesn't work well for part brake stops because the setting is static.The same holds true for O.E.M. all wheel dics brake systems.Honestly,The system of front dics/drum brake systems,the drum brakes are more forgiven in the balance issue.

The truth is the ABS systems and for all their misgivings was the OEM's systems answer to those balance issues.It doesn't work very well because at times the ABS systems do kick in when not needed.

The latest innovation is a system that senses the type of braking and the wt transfer of braking condition that is being applied.So it adjusts pressure depending on the type of braking being done.Panic stops vs normal braking.

My two cents is when guys try to adapt dics brakes using existing brake line sizes and master cylinders.Then volume issues do occur and that can get complicated is a hurry.

By using drum brakes in the rear(11" drum updates)it is more closely to the OEM design and is still a upgrade from the stock system.In fact you can get a 1" rear wheel cylinder inlet and run the same 1" brake line for super results that don't drag like disc brakes do for drag racing.And yes you do see in the super dragster classes disc brake systems,but given the engines outputs it is not a great concern where the braking power is more important than the loss of it because of a disc brake system.In fact you see proportioning valves on solid mounted rear axle dragsters to try to control the brake line pressure so to "try" to eliminate wheel hop issues while trying to stop them.


I totally agree with Dave in regard to a 9" rear end.In fact in my Ole Yellar project,I have planned for a Ford 9" so I can play the center chunk gear changes to the best over all results.

I have more documentation about this topic if needed.