rear brake cylinder size

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Wally2
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Re: rear brake cylinder size

Post by Wally2 » Wed Jun 12, 2013 19:39

Hey, less of it, thats what I have on!
Image
Then again they due look a little like bicycle tyres!
I have been looking for some minilites but not sure what size i.e I think I could go for 10 x 5 or even go to 12" say 12 x 5 with 60 tyres this would only make a small difference to the outside diameter (about 6 mm) so should fit ok. If Iwent to 12" maybe the speedo would be correct speed and distance then!
Chris
Chris
WEEMOKE
JUX180D

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Doug G
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Re: rear brake cylinder size

Post by Doug G » Wed Jun 12, 2013 19:51

Mine are a little bigger


Image
Having a moking good time!

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Doug G
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Re: rear brake cylinder size

Post by Doug G » Wed Jun 12, 2013 20:09

Nigel(no top)Sykes wrote:Which diameter of cylinder give the greatest effort, and which the least ?
Anyone got an answer?
Having a moking good time!

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Wally2
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Re: rear brake cylinder size

Post by Wally2 » Wed Jun 12, 2013 20:18

It can also depend on the bore size of the master cylinder i.e.
From Somerford minis
Master Cylinder
Single Line Brakes 1959-75
At first, drum braked Minis and Mini Coopers were fitted with 0.75" bore master cylinders, but to increase pressure (and thereby hopefully improve braking power) standard models were upgraded fairly quickly to a 0.70" bore cylinder, while Coopers received a 0.625" bore cylinder, losing their hydraulic booster at the same time. By the 1990s the 0.70" bore cylinder was being manufactured with a plastic reservoir rather than the original metal one, but thankfully pressure (and money) from the classic car industry were brought to bear on the manufacturer who now also produces an original style cylinder, complete with metal reservoir.

The Cooper 0.625" bore cylinder is, at time of writing, no longer available, owners using the 0.70" cylinder as a replacement. Occasionally a few repair kits surface for the 0.625" cylinder, so we would advise Cooper owners to contact us to see what's available before purchasing a new 0.70" bore cylinder.

So it would seem that the smaller bore would give greater pressure.
Chris
Chris
WEEMOKE
JUX180D

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Dean
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Re: rear brake cylinder size

Post by Dean » Tue Jul 02, 2013 8:42

As a follow up to the 2 types of spacer drums, an interesting post here.
Dean
http://forum.minicooper.org/showthread.php?t=12332

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