• Christian
    24 September 2013 at 07:35 #50425

    I’m replacing all of the brake pipes on the Rapide in Cunifer pipework and I realised that the duel system (as setup on the Rapide) has no safety benefit if one system looses pressure…

    The brake pedal is connected to the two master cylinders with a bar which is pivoted in the middle (see photo below; taken a while ago) . If one system looses pressure the bar pivots and therefore does not allow you to operate the good side effectively – the pedal hits the floor.

    I found this to be the case when I bled one system and tried the brakes.

    Just an observation!

    ray sherratt
    24 September 2013 at 18:41 #50426

    Hi Christian,
    Make shaw the correct size cylinders are fitted and the rightway round. On competition setups the bar is adjustable
    by means of threaded bar and yokes. On your system the bar
    should lock against the yoke, the master cyl is threaded
    into. Meaning the pedal should push the good system to brake
    the car.

    24 September 2013 at 22:33 #50427

    Thanks Ray, I think I know the master cylinders you mean – with threaded rods. What happens if one side requires more pressure than the other – such as the rear (as it has a longer run of pipe)? If the rods are locked to the yolk won’t it bias one side etc?

    ray sherratt
    25 September 2013 at 18:17 #50428

    Hi Christian.
    I assume the system on your car is a frontrear split, and not
    split diagonal frontrear. Anyway the lenght of pipe makes no
    differance on presure that the front or rear cyls see on entry
    into that cylinder. It would be nice to see a close up of the
    bias bar assembly if you could post it on the site.

    ray sherratt
    25 September 2013 at 18:34 #50429

    Hi Christian
    On taking a 400% increase in viewing the picture I see that your
    dias is prodution fixed. the bar between the cyls is set to give
    the correct presure frontrear. If the clevis pin is in the centre
    of the yokes and the cyls are the same size ,then the presure
    produced will be the same from each cylender.
    Ps. It would be nice to see some close pics of the setup.

    25 September 2013 at 21:38 #50430

    Hi Ray, you know your stuff! I will get a close up pic soon…

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