Toymods Car Club Inc: Tech & Conversions => Remote brake booster problem.

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IRA11Y
Forums Junkie

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Location:
sydney
Registered:
May 2002

Re: Remote brake booster problem.	Tue, 27 April 2004 08:50

AT THE PEDAL SIDE the problem with T'ing them up is that youre combining 2 different pressure rates.. i.e the front and back part of the master is often two different sizes,large for the rear if theyre drums and smaller for front with discs and even more especially with some of the later nissan ones having proportioning or partial self proportioning masters. im guessing that by using the T youre creating some sort of fluid lock, because one large pressure is pushing against the smaller pressure, within the same loop. this could be fixed in some instances by using one way valves but obviously you dont want to use those with a brake line for obvious reasons LOL ultimatley im not sure that T'ing them is working for or against you so maybe thats something to look at. AT THE REMOTE BOOSTER/MASTER END ok again the T thing, im not sure what sort of slave your using to push the booster arm?? all the ones ive seen have been something along the lines of a clutch slave with a single line in pushing the booster arm. as far as i can tell youd only need one line from the pedal to do this, in fact if it was me ..... id look at using a clutch master, why not?? its all you really need, the only thing you have to check is that ... A/ it provides enough fluid to push whatever slave you have at the remote end far enough to get maximum travel on the booster arm to engage the remote master the full length... B/ it will provide and stand up to the necessary pressure to provide maximum force which i wouldnt forsee as a problem. ok on to the booster part of things.... Stu has allready covered the basics pretty well but heres some other bits that might help... ok.. are you using the original booster and master for the remote?? and is the pedal master the same fluid ratio? look on the side of the master youll see stuff like 13/15 or 7/11 these are the front rear split rates of the master, they refer to the bore or volume ... lets take it a step further IF your pedal master has a better fluid rate than the remote master it will require less force and distance of pedal movement to create the same force ... soooooo maybe there is nothing wrong with the booster, its just that your setup is exceptionally efficient at providing force.. remeber that you have lost a lot of feel with the remote if youve changed the master sizes. of course the total reverse of this scenario can also be true, in that you may require more pedal movement and force to get the same braking strength. WARNING the above may all be bollocks but its my best guess, so modder beware [Report message to a moderator]

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