Hi Martin, Not sure about the areas but the Cosworth calipers are certainly bigger than the original XR2 ones were and worked ok. The Hispec 4 pots are smaller diameter but spread over a larger pad area to give more even pressure.
Bob Sent from my iPad > On 24 Mar 2019, at 22:53, Susan and Martin Scott > <susanandmar...@corringham99.free-online.co.uk> wrote: > > Ignoring the fluid change..... What is the combined area of the pistons > compared to the previous single ones? I may know an alternative, but it > depends what the requirements are. It could be that a larger bore master > cylinder is needed, but some dimensions will be needed to calculate. > Martin > ----- 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 > > -- > -- > You received this message because you are subscribed to the Google Groups > "Quantum Owners Group" group. > To post to this group, send email to quantumowners@googlegroups.com > To unsubscribe from this group, send email to > quantumowners-unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/quantumowners?hl=en > > IMPORTANT NOTE: All information presented herewith is provided on an "As Is" > basis, without warranty or the implication thereof. Neither the Quantum > Owners Club nor the individuals associated with the Quantum Owners Club or in > the preparation of the above information shall have any liability to any > person or entity with respect to liability, loss, or damage caused or alleged > to be caused directly or indirectly by the instructions contained within this > or related message(s). > --- You received this message because you are subscribed to the Google Groups > "Quantum Owners Group" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to quantumowners+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > > > --- > This email has been checked for viruses by AVG. > https://www.avg.com > > -- > -- > You received this message because you are subscribed to the Google Groups > "Quantum Owners Group" group. > To post to this group, send email to quantumowners@googlegroups.com > To unsubscribe from this group, send email to > quantumowners-unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/quantumowners?hl=en > > IMPORTANT NOTE: All information presented herewith is provided on an "As Is" > basis, without warranty or the implication thereof. Neither the Quantum > Owners Club nor the individuals associated with the Quantum Owners Club or in > the preparation of the above information shall have any liability to any > person or entity with respect to liability, loss, or damage caused or alleged > to be caused directly or indirectly by the instructions contained within this > or related message(s). > --- You received this message because you are subscribed to a topic in the > Google Groups "Quantum Owners Group" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/quantumowners/SUp1FZ-X0w0/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > quantumowners+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to quantumowners@googlegroups.com To unsubscribe from this group, send email to quantumowners-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s). --- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to quantumowners+unsubscr...@googlegroups.com. 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