Damian
You should have your rear discs engineered, strictly speaking.
You have a range of options to make your brakes perform brilliantly.
The cheapest and easiest option is to fit a proportioning valve in the brake
line to the rear brakes. I would be very surprised if this needed an
engineers report as these are standard on many cars. You can buy an
aftermarket in-car 6 position adjustable one from Racegear for about $130,
but a fixed depressuriser from a car such as a mini, or an adjustable one
from a GQ Nissan Patrol (above the rear diff). Others may have a wider
source list?
You can fit twin master cylinders with an adjustable balance bar between
them to alter the pedal pressure balance between front and rear. This isn't
an easy or cheap option.
After this you can fiddle with caliper sizes and pad materials- a very
expensive option.
You must fix the problem as you sound like the car is unsafe to drive and
you are not enjoying the benefit of a great set of brakes, which you should
have. They just need the last bit to make them perform brilliantly. Go for
the rear line depressuriser, fixed or adjustable.
----- Original Message -----
From: "damien cm" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, 6 April 2001 10:55 AM
Subject: BALANCE
> Hi all listers,
>
> I have a brake question for ya all!! I have 200B Girlock brakes in the
> front and scorpion discs and calipers in the rear. All four discs are
> freshly machined and the pads are reasonably new. Calipers are in good
> condition to the best of my knowledge. I have a brake booster which I
think
> is 180B (it was the only mod on the car when I bought it)
>
> When I brake hard, the rear wheels lock up whilst the front are still in
the
> process of braking the vehicle. I HATE this as I have limited control and
> feel that my brakes could be performing better. It also is destroying my
> tyres due to the lock-up.
>
> How do I solve this problem. I am aware that you get a 'bias' valve
> installed on the car, but this is expensive and requires engineers
> certificate. Could a different master cylinder be installed, say, from a
> car with 4 wheel discs??? Because I have gone from drums to discs, I
assume
> that there is to much hydraulic pressure on my rear discs, therefore
causing
> them to lock up before the front. Do different master cylinders distribute
> different amounts of pressure between front and rear than what a 180B
> mastercylinder would????
> IS there any good websites on this topic???
>
> Any help much appreciated.
>
> thanks, Damien.
>
> _________________________________________________________________________
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>
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