Rob55
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| posted on 28/10/12 at 10:31 PM |
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Master Cylinder Size - AP's and Golf Rears
Hi guys
I have a set of AP 4 pots and Mk4 Golf Rears to go onto my Westfield along with a bias pedal box. I have been supplied with 0.7" master
cylinders but I have heard of people using 0.625". Can anyone comment on what the best size is likely to be front and rear.
Also is it worth upgrading from Girling to AP Racing?
Rob
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loggyboy
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| posted on 29/10/12 at 08:48 AM |
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If yours has been supplied with those and the calipers spec'd with sane order I would expect that westfield know that they will work correctly
with that caliper combo.
My twin MC are .7 and .6 (or similar decimal figures thereof), the smaller one is for the front and the larger for the rear. However I have a bias bar
should I need to adjust this. Even with a bias its best to have the smaller bore at the front to naturally give more force to the fronts.
Mistral Motorsport
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Rob55
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| posted on 29/10/12 at 06:26 PM |
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I actually changed the braking setup 3 times between placing my order and collecting my kit, so I am just a little dubious whether Westfield will have
selected the optimum bore sizes or not. Especially seeing as I am putting the car on track, the salesman was much more "road" spec
orientated.
I do find it a bit odd that both front and rear are the same size. I spoke to AP directly, they could not give a definitive answer but said they
thought a bigger rear would make sense.
So should I downsize the front, keep them the same or upside the rear? 
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britishtrident
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| posted on 29/10/12 at 10:53 PM |
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Every track car is different with so many variable don't expect all the answers all you can do is pick something within the right ball park
and suck it and see.
[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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indykid
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| posted on 29/10/12 at 11:33 PM |
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What size are the pistons in the front calipers? If they're bigger than optimum, you'll need a bigger master cylinder to maintain
balance.
It's the ratio of master to slave area that drives sizing, not which axle it's used on.
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