I thought about the rear disc conversion but even on a twisty sprint track with 
heavy braking zones the rear drums never got any real heat in them. Perhaps 
with adjustable bias and maybe a bit more rear braking they might get hotter 
but I never felt that discs were a requirement.

Bob

Sent from my iPad

> On 1 Apr 2019, at 19:51, Darren Siepka <[email protected]> wrote:
> 
> Are the rears solid or vented? I found my 280odd cosworth vented rears keep 
> glazing up and never get hot on the road no matter how I drove ! The 280 
> cougar fronts work fab though. 
> 300mm would need 16" + iirc ?
> 
>> On Mon, 1 Apr 2019, 19:48 'Robert Craig' via Quantum Owners Group, 
>> <[email protected]> wrote:
>> That's a very large disc size for a Quantum. What size wheels are you using?
>> 
>> Bob
>> 
>> Sent from my iPad
>> 
>>> On 1 Apr 2019, at 08:26, Tom Walker <[email protected]> wrote:
>>> 
>>> I fitted a similar thing from Rally Design meant for a MK1 escort iirc, 
>>> with an adjuster for front/rear bias. And I've got a remote vacuum assist 
>>> unit (Austin something) driving my 305mm front hispec "monster" discs and 
>>> rear disc conversion.
>>> However, due to various family issues, I've not driven the car since 
>>> fitting the vacuum assist (4 years now) so I can't attest to it's behaviour 
>>> yet. Maybe this summer (wistfully pondering)...
>>> 
>>> 
>>>> On Sun, 24 Mar 2019, 17:39 'Bob Craig' via Quantum Owners Group, 
>>>> <[email protected]> wrote:
>>>> 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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