They can't be mixed - hence the IVA requirement to label the master cylinder
reservoir. I had 'a near issue' with guy doing an MOT test on my Rickman a
couple of years ago - he asked why I had a container of DOT5.1 fluid in the
car, and suspected I had a leak. I explained to him I didn't have a leak,
but if at some time in the future it happened miles from home it was
possible I could get home safely with a top up. He then asked why I couldn't
just buy a bottle of brake fluid if it happened, so I pointed out it was dot
5.1 and didn't mix with others and he'd never heard of dot 5.1 fluid !
Martin
----- Original Message -----
From: "'Robert Craig' via Quantum Owners Group"
<quantumowners@googlegroups.com>
To: <quantumowners@googlegroups.com>
Sent: Sunday, March 24, 2019 7:31 PM
Subject: Re: [Quantum Owners] Brake master cylinder conversions
Hi Martin,
Not sure what was in it before but yes, possibly dot 3. I did wonder about
switching to dot 5 but it seemed like a sensible approach when going to a
higher spec system.
Bob
Sent from my iPad
On 24 Mar 2019, at 17:57, Susan and Martin Scott
<susanandmar...@corringham99.free-online.co.uk> wrote:
Did you have dot 3 fluid in originally? If any fluid (other than 5.1) has
been used with the brake parts the seals won't last long if the fluid is
then changed to 5.1. due to fluid incompatibilty.
Martin Scott
----- Original Message ----- From: "'Bob Craig' via Quantum Owners Group"
<quantumowners@googlegroups.com>
To: "Quantum Owners Group" <quantumowners@googlegroups.com>
Sent: Sunday, March 24, 2019 5:39 PM
Subject: [Quantum Owners] Brake master cylinder conversions
After upgrading my already upgraded 2+2 brakes from Cosworth single piston
calipers and huge discs to a much lighter Hispec billet 4 pot system, I
can't get a decent brake pedal and have next to no braking force. I purged
all the old brake fluid and refilled with dot5.1, pressure bled
everything. I'm thinking that my master cylinder may be faulty and just
looking at options. I know the later type cylinder is a bit like rocking
horse poo these days and if going to the extent of changing, I'd rather
have a more performance focused set up.
Has anyone fitted the Burton Power bias assembly. It does away with the
standard servo and master cylinder.
https://www.burtonpower.com/adjustable-bias-brake-assy-ford-fiesta-mk1-mk2-mk3-brk061.html
Bob
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