Treadle Vac - compensating valve?

[nellis003]

Hi all,

I just installed a Treadle-Vac power brake system into a '58 Edsel Citation that previously had manual brakes. The brakes are working - too well. You barely touch the pedal at low speeds and the car noses down badly, like the front brakes are grabbing way too hard.

Is there a check valve that the power brake system is supposed to have, or are the shoes maybe too soft for power brakes? The only components I changed were the master cylinder and the pedal setup. Should I have done anything else?

Thanks for any guidance.

Nick