Turner disc brakes

[Hogtrough]

My OEM discs were frozen due to many years of unuse, so I elected to modernize with the much larger Turner disc kit (all lines and hoses replaced too, and rear drums checked and adjusted) . On Jim's advice, I didn't install a proportioning valve, but wonder if I might need one. Car veers heavily right on a hard stop and I think it may be the rears causing this (often described as wanting to "swap ends"). I think it would be downright dangerous on a slick road, so wondering if I need to have the rears doing less by installing a variable proportioning valve. 

[Dwight FitzSimons]

What you're describing is the rear brakes locking up, causing the car to swap ends.  In other words, the rear brakes are providing (proportionately) more braking force than the front.

But, think about it, if the rears didn't lock up with the Bendix/Dunlop brakes then why would they lock up with the Turner brakes (which provide more braking force than the old disc brakes)?  The answer is that they couldn't.

You have something seriously wrong.  I would go through the complete brake system and make sure that everything is correct.

A couple months ago I had my mechanic convert my '64 Avanti's disc brakes to the Turner system, and install his dual master cylinder kit.  Everything worked out perfectly and the car has strong brakes that stop the car straight.  I am quite happy with Turner's brakes & MC.

--Dwight

[Gunslinger]

Your rear brake wheel cylinders may need rebuilding…one may be frozen, a leaking seal or a bad hose.  Don’t go adding something that may not be necessary.

[John Brissette]

Why don't you call Jim and, find out what he thinks the issue could be.

[EnduroDriver]

You mentioned Jim didn't recommend adding a proportioning valve. Is that because you already have the dual circuit master cylinder?

When you say the car veers right does that mean the front of the car goes right or is the right rear trying to come around on you? 

I did the Turner kit up front, dual master upgrade and all new rear drum brake components. Car stops great, straight as an arrow.