Brake bios valves

[sydneymk1]

have mk3 rear drums in my mk1 sometimes on very hard braking get rear locking up before front. has anyone played with bios \ proporioning valves

[h100vw]

Thing with the bias valves is they only came fitted to GTI MK1s that I am aware of. The MK2 one is a different mounting so wouldn't go on there.

The other place I look to get one would be a Cabriolet.

There are restrictors fitted on some MK1 chassis vehicles, usually just below the master cylinder as the rigid lines go under the firewall.

Gavin

[Golf Loon]

you can get adjustable valves, which work but are illegal

[Oneofthegreats]

you can get adjustable valves, which work but are illegal

It's funny because that's what I thought too.

As I found out it's legal in Vic., as long as you can't adjust it while your driving.
That's what an engineer told me, as I'm going to fit one to truck & GTI once the pedal box is made & had to clear it first.

[gtimk5]

I have one fitted to Gunter, my competition Golf which is fitted behind the handbrake lever as I only have one pipe running to the rear..It is a Willwood unit and I have the rears backed off as much as possible. I am running Mk2 rear discs.
Cheers, Andrew

[sydneymk1]

my rear lock up problem was caused by the linkages i had them a bit to wound up was taking up all the free play at the booster

hope this saves somone else a lot of stuffing around