Mr K
Posted a lot
Posts: 2,993
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Aug 17, 2006 14:30:14 GMT
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i am tempted to fit a Hydraulic hand brake to the new kitten and have been looking and setups like: www.rallydesign.co.uk/catalog/product_info.php?cPath=562_599&products_id=4092just attatched to my standard lever, i would also leave the cable on for MOT purposes but have a few questions: - the law: from what i have heard your not allowed a purely hydraulic parking brake, so where would i be with the law? as i would have a cable brake as well as a hydraulic setup? would i have to removed the hydraulic setup for the mot? - how do you plumb them in? are they simply in the line running from the front to the rear with some kind of 1 way valve infront of it? my other questions where: - what is a fly off handbrake? the name makes it sound pretty obvious but is there no way to lock them at the top etc etc? - brake servos and drum brakes.... daverapid pointed out you don't need a servo with drums, however in this months RetroCars mag it mentions that the A40 had a servo and drums all round? sorry for the boring thread!!
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Aug 17, 2006 18:05:58 GMT
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you don't need to remove a hydraulic hand brake for the mot AFAIK. I believe your right in what you say about a fly off hand brake. servos on drums are great when cold. my lecturer at college had a minor with riley 9" drums on the front and a remote servo with mintex linings. it would pick the back end clean off of the ground when the brakes were cold. when they heat up problems occur. because you are putting a greater force on the drums, they can warp easier than normal. its a popular classic rallying thing, like fluid recuirculators. discs generally have, but don't always need, a servo, drums generally do not. you could improve your brakes by fitting larger bore wheel cylinders, but that might degrade the pedal feel. remote servos can also give a rubbish pedal feel. I am open to someone else's experience, of course and I would love to know how the system is routed through it (I got a rough idea). might be interesting for the minor, as that has a shat handbrake.
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Brakes - a few questionsslater
@slater
Club Retro Rides Member 78
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Aug 17, 2006 18:42:48 GMT
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Theres nothing stopping you having a servo on drum brakes. All they attulay do is reduce the amount of pressure you have to apply to the pedal to making stopping 'easy' but they also make the pedal feel more spongey so i avoid them.
Fly off hand brakes are just a handbrake without a ratchet yes? a kind of primitive alternitive to a hydro handbrake
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Aug 19, 2006 19:37:11 GMT
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flyoff handbrake is where you press the button in to lock the mechanism, reason is that you can pull it and let go, rather than having to put it back down again, saves time...
As said above, servo will not make any difference to your brakes, only the brake pedal.
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Aug 19, 2006 19:38:47 GMT
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oh also you pipe the cylinder up by putting the pipe comming from the mastercylinder to the rez point on the handbrake cylinder and the one to the rear is the normal outlet.
you will find you cant operate the handbrake after you have pressed the brake pedal, it hydrolicaly locks its self, but you never should need to do both at one time aparently!
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Aug 19, 2006 19:45:06 GMT
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oh also you pipe the cylinder up by putting the pipe comming from the mastercylinder to the rez point on the handbrake cylinder and the one to the rear is the normal outlet. you will find you cant operate the handbrake after you have pressed the brake pedal, it hydrolicaly locks its self, but you never should need to do both at one time aparently! thanks for that, it's about what I thought. nice to know for certain.
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Aug 19, 2006 21:00:36 GMT
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ask phoenix he put one in the monza
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2001 HONDA CT110 (NOT RCV)
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Aug 20, 2006 12:41:56 GMT
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Monza would be a nice car to rally )))))))))))))))) They are very nice looking cars..
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Aug 21, 2006 14:25:47 GMT
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As already said hydraulic is legal as long as you have either a cable handbrake as well or your hydraulic handbrake is a completely seperate circuit (for example if you had two calipers on one disc one for for foot brake and one for handbrake).
I wouldnt recommend having a cable and hydraulic on the same lever as one will reach the limit of travel before the other so only one would work.
You just need to run the pipe that goes to your back brakes through the handbrake cylinder and then connect it back up. If you have two pipes going to the back then use a T piece before and after the hanbrake cylinder.
Another thing to remember is that if a car has any form of rear proportioning/load sensing or bias valve fitted this needs to be before the cylinder otherwise it will just restrict the effectiveness of the handbrake.
Fitting the handbrake will give you more freeplay on the footpedal mainly down to initial movement of the handbrake master cylinder thats one reason why I fitted a return spring to the one I fitted to my monza to try to limit this movement.
Most important when making it yourself is to get the pivot point right for the most leverage otherwise you will find yourself putting a lot of effort in to yanking the lever and finding that you have almost zero braking. And again it depends on the pivot point but if you get it right you can use the handbrake with the footbrake and I often do with the monza and previously my escort when autotesting as it helps overall braking and control when stopping at lines.
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