I'm just calculating the size of a rather odd shaped brake & clutch fluid reservoir. It needs to be specially made to fit a recess above my rack and the largest I can make it is just under a litre including airspace. Bearing in mind that it needs to feed both brake and clutch systems, is it going to be big enough?
I have just removed an engine from a vehicle and taken the reservoir out, it fed both clutch and brakes and must only be about 250/300ml in size.
The amount of fluid that is exchanged with each press of a pedal is minimal and only needs to allow for expansion and cornering forces. As the brake
pistons move out and pads wear the fluid is used so if you have large four pot calipers this may be a consideration.
Dont know if that helps!!.
you can work out how much fluid is pushed on each brake press.
how many pistons? diameter? how far they move, probably not more than 2 mm and same for rear. Or diameter of master and piston travel?
I'd be surprised more than 50 cc is moved.
You need to allow for fluid to take up wear in brake pads, again mknowing the thickness of friction material gives yop volume; not that it matters
since you wold be topping them up.
I'd guess 300 cc for the master would be sufficient.
(note the word guess appears several times in this post 
)
Pretty much what I was thinking but it is always a good idea to get a second or third opinion to make sure you are not totally off the rails. 
I reckon, allowing for the airspace above the fluid it will hold a little over 500ml at it's 'min' mark so it should do fine.
As you both said, the amount of fluid movement is minimal.
Before I part with my highly cherished beer vouchers, does anyone know if there are any SVA requirements for a reservoir apart from the obvious level
switch? I am getting one made in stainless - it will have three baffled chambers to supply each m/c individually.
I think one of us may have missed the point here
The reservoir is there to provide a source of fluid to compensate for pad / disc wear and leakage.
Once the system is bled depressing the pedal will only compress fluid downstream of the master cylinder, the fluid in the reservoir plays no part in
the braking or clutch action.
Mick
[Edited on 15/1/06 by Mix]
quote:
Originally posted by Mix
I think one of us may have missed the point here
...the fluid in the master cylinder plays no part in the braking or clutch action.
Mick
Bear in mind that the bigger the reservoir, then there are more pumps of the pedal available, if a pipe or hose bursts and you need to keep pumping to acheive an albeit minimalized braking effort.
Bugger 
Mick
quote:
Originally posted by Mix
I think one of us may have missed the point here
The reservoir is there to provide a source of fluid to compensate for pad / disc wear and leakage.
Once the system is bled depressing the pedal will only compress fluid downstream of the master cylinder, the fluid in the reservoir plays no part in the braking or clutch action.
Mick
[Edited on 15/1/06 by Mix]
he's not, he's looking at fitting a bespoke reservoir now.
quote:
Originally posted by 02GF74
to origianl post: how come you are having this problem fitting an off the shelf master cylinder/reservoir?