hy i have 2 single brake master cylinders with one outlet each like the pic.
Is it legal to use both of them side by side one feeding the front brakes and the other feeding rears or do front and rears have to come from same master cylinders chears

if you have 2 master cylinders I am assuming you have a biased pedal box.

if so one feeds the front one the rears..

thats how most are done with a bias pedal box.

It won't pass IVA if you only have one cylinder pushing on all 4 corners.

MikeR I think your post needs some clarification..

my locost passed IVA with just one standard sierra master cylinder operating all 4 brakes

perfectly legal but your bias bar must be welded solid.

New requirements for IVA are moving to or have moved to only needing to pin the bias bar, sense is perhaps prevailing

I have heard of one iva tester who is happy with nylocs

aslong as you need tools to adjust that is locked...

[Edited on 18/9/10 by gavin174]

You can use a single master cylinder like the sierra one but it is effectively twin piston in line in a single barrel supplying dual circuits rather than having twin parallel/tandem pistons in side by side master cylinders supplying dual circuits.

OK, my brain has finally given up the ghost and can no longer tell stork from butter.
Twin/parallel - Two pistons side by side.
Tandem - Two pistons, one in front of the other.
As long as they operate dual circuit brakes they are both legit.

[Edited on 19/9/10 by Dusty]

in short, yes you can
(and i think you should)

thanks for the quick replys, i dont have a pedal box yet ive still to build one, just needed to check first.
I think ill build a biased pedal box as ive already got the master cylinders just need to decide on fixing bias bar with nylocs or weld

quote:

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Originally posted by tofferson4
thanks for the quick replys, i dont have a pedal box yet ive still to build one, just needed to check first.
I think ill build a biased pedal box as ive already got the master cylinders just need to decide on fixing bias bar with nylocs or weld

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I might very well be wrong... but don't you need a low level warning light these days? Might be hard to do with the integral reservoirs on these?

Just my thoughts...

I think it can be done with special caps with integral floats.

quote:

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Originally posted by Dan.
perfectly legal but your bias bar must be welded solid.

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