matty h
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| posted on 22/12/09 at 10:37 PM |
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Fiesta Master cylinder
I have got a MK 1 Ford Fiesta master cylinder and Willwood brake bias adjuster that I intend to fit on my MK.My plan is to use two pipes to the front
brakes and one to the back with adjuster for back brakes and block the spare outlet off with a bleed nipple.The car is running Sierra disc brakes all
round.Please can anyone tell me which of the four ports I should use for the front brakes and which one for the back.There are four ports two large
and two smaller.
Thanks in advance Matty
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bodger
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| posted on 22/12/09 at 11:02 PM |
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Hope you're not intending to IVA it with a brake bias adjuster. I don't think they allow them.
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britishtrident
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| posted on 23/12/09 at 12:05 PM |
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Use two ports and Tee the front brakes off a single line.
In theory it dosen't matter which ports you use as long as they or on different circuits --- just use one rear port and one front port. I
would use the front port for the front brakes, apart from being a more logical layout the seal in the front circuit of the master cylinder is less
likely to fail.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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britishtrident
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| posted on 23/12/09 at 12:07 PM |
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To reduce the pressure to the rear brakes you can use the valve fitted to the master cylinder on the non ABS Mondeo Mk1
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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mistergrumpy
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| posted on 23/12/09 at 01:58 PM |
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If I remember rightly and BT may be able to comment here but I think this MC has a 50/50 split. I.e. the two big holes and the two small holes and
that's why you need a bias valve.
I have the same MC on my car and put the valve in line to the rear brakes within the tunnel after my first SVA fail and got away with them not looking
in there on the retest.
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britishtrident
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| posted on 23/12/09 at 02:10 PM |
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A fix pressure limiting or pressure proportioning valve is not problem IVA wise ---- but any form of manually adjustable brake bias is.
The IVA rules are actually framed to try and push builders towards using a diagonal split system without actually completely banning a simple front to
rear system.
If were building a road car with rear discs to go through IVA I would probably use a diagonal split system with two Mondeo valves on the master
cylinder, but it would not be difficult to design the pipe layout to make it very easy to switch to a simple front rear split at later date.
If building a car with Sierra drums on the rear I would simply use smaller wheel cylinders to reduce the rear braking force.
[Edited on 23/12/09 by britishtrident]
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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matty h
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| posted on 23/12/09 at 03:57 PM |
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Thanks for the info IVA is not a problem as the car is built and has had SVA.
Job for over christmas got all the parts,just not keen on getting brake fluid all over.
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britishtrident
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| posted on 29/12/09 at 08:21 PM |
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Apart from anything else the Willwood valve won't have any effect at the low hydraulic line pressures on your car. The pressure won't be
high enough for the valve to operate.
Willwood parts are generally designed for much larger & heavier cars --- don't assume because they are considered bling parts they are
automatically better.
If the rear wheels aren't locking up prematurely you don't need a bias valve in the rear brakes.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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