Songzzz

Rear wheel locks up fairly easy and have been performing cocky "skidding stunts" on the Freeways lately.

Big Reds in front, and I've the old fronts(TurboS) swop to the rear.

New Master Brake Cylinder.

Is it possible that I mixed up the brake lines connection at the MBC?
i.e. front to the rear and rear to front!

I've heard of the Brake Bias Valve, is that "build-in" with the MBC?

Could my Brake Bias Valve be faulty? or MBC?

Sami951

I think the tuners usually suggest using stock rear brakes with big red fronts... maybe the bigger turbo s front calipers in the rear cause too much bias?

sybelix

yup, you don't need such a "big" brakes rear, 'cause when you brake hard, the weight of the car moves on the front axle, and the weight or "down force" on the rear axle is quite modest, so smaller brakes will do.
That might be your problem..

Dave E

Did you have to use an adapter to mount the "s" calipers? I can't see how you could mount them without...I have '86 fronts in back with my big red fronts. Turbo s front calipers would definitely have too much bite for the rear

smokey

The Turbo S brakes at the rear are just about equal to the Big Reds, so you've got too much brake at the rear. Try putting the original brakes at the rear, with a 33 or 44 proportioning valve.