Advice please-Brakes

[DynoDan]

Some advice needed on Brakes.

I have a 69 Bronco sport that I converted to front disk brakes (DANA 30) a number of years ago.
I did not change the proportioning valve (still the original H block) But I did replace the master cylinder (stock for 69 drum brakes) and removed the check valve from the large reservoir connection.
It all works but I would like to make it better. I recently picked up a new proportioning valve as originally used in a 77 Bronco that has disk brakes. How much of a difference would this addition make?
I do not want to go with a power brake setup but ask if a new master cylinder as used in the 77 would make a difference?
I am open to suggestion and would appreciate any and all comments. I bought this Bronco 40 years ago from the original owner and other than an addition of a home built AC system, a 4 speed overdrive transmission, electronic ignition and disk brakes and it is completely stock.
Thanks,
Dan

 

[Timmy390]

Look into the use of an f250 special master cylinder. In has a bigger bore this pushes more fluid. I think the Chevy conversation needs more fluid moved due to the components used but am not an expert on it.

Do you have an adjustable rod? Maybe your not traveling the m/c enough.

I have the Ford power conversation and run H block and drum/drum m/c with RPV's removed. It stops well. Was better with 31's but still good with 33's.

Tim

 

[Apogee]

Changing from a 1" bore MC to a different 1" bore MC won't change anything, and adding the combination/proportioning valve from a '77 may shift your brake bias slightly by reducing the rear brake pressure during heavy braking, but shouldn't change your pedal feel in any way, or performance if you're not experiencing premature rear brake lockup now.

You say that the brakes work now, but that you would like to make them better, so how would you like them to be better? What does "better" mean to you? Less pedal effort, less pedal travel, more pedal feedback, etc?

In general, I'm not a fan of oversizing master cylinder bores just for the sake of a high, hard pedal...anything you gain with respect to volume, you lose with respect to pressure thanks to some famous dead guy's principle (Bernoulli) relating pressure and volume in a hydraulic system. MC bore size is one variable and should be related to caliper piston area (or wheel cylinder), rotor/drum diameter, pad/shoe coefficient of friction, pedal ratio, boost/gain factor if power brakes and baseline specs of the vehicle, including but not limited to weight, CoG height, wheelbase, etc.

Tobin

 

[Rustytruck]

what size tire and wheel do you want to stop?