When fitting floor mounted pedal boxes, the master cylinders have to be higher than the callipers, by how much, so the fluid cannot flow back, or can you fit one way valves, regards Alan

if they have integeral resevior they would have to be higher. but suly if you are using a remote resovior its the resovior that has to be higher. ( i think ? )

but on both cases not sure by how much, my remote resvior will be about 12 - 14 inches above the mast cylindars.

regards

agriv8

The master cylider(s) don't need to be higher than the calipers. Assuming the system is sealed correctly and blead correctly to remove any air then it is closed hydrualic system. Once you take your foot off the pedal, the fluid should return to the master cylinder/resevoir.

(or have I misunderstood the question?)

[Edited on 8/2/07 by nick205]

Ideally the reservoir needs to be a little higher than the m/c & calipers but you can get away with mounting it anywhere really as gravity doesn't really come into it after the initial fill-up - it can make bleeding a little easier though.

[Edited on 8-2-07 by RazMan]

can't see how the fluid could flow from the calipers into the master/reservoir if these were lower - if it could. then a vacuum would be created and that is not possible unless there is a leak.

but seeing as I've yet to come across a car that has brkae or clutch master lower than calipers, then maybe there is something I (we?) don't know about?

quote:

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Originally posted by 02GF74

but seeing as I've yet to come across a car that has brkae or clutch master lower than calipers,

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brake run and steering ext

Most formula fords have their master cylinders lower than the wheels.

Thanks for the replies, problem solved, regards Alan.

Hi having the reservoir lower than the calipers has been known to give some problems which can be overcome whith THESE valves available with 2lb residual pressure held on. Also helps decreace some pedal travel problems.

cheers matt

quote:

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Originally posted by 02GF74
can't see how the fluid could flow from the calipers into the master/reservoir if these were lower - if it could. then a vacuum would be created and that is not possible unless there is a leak.

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I have run integral resovoir MC`s lower (floor mounted) than my calipers with no problems what so ever.

My latest car runs floor mc`s with the resovoirs mounted around the diff (for weight distribution) at the rear, again a rock solid pedal all the time and no problems.

John

Thanks for all the replies, regards Alan