loks Posted January 4, 2006 Share Posted January 4, 2006 I know I usually wander around this area in total awe with eyes wide open but I do have a techie question.... well something that has been playing on my mind anyway. When you depress the brake peddle is the whole brake reservoir assembly supposed to move forward? It does on mine anyway. Would the braking back pressure be increased (i.e. improved braking force) if some sort of bracket was added to the bodywork to resist this movement or would this damage the servo in some way? Any advice would be highly appreciated Link to comment Share on other sites More sharing options...
supRo Posted January 4, 2006 Share Posted January 4, 2006 I'm sure it's not supposed to move. I have seen one other supra with movement in the brake servo/master cylinder Link to comment Share on other sites More sharing options...
Nic Posted January 4, 2006 Share Posted January 4, 2006 Dave, Cusco make a brake master cylinder brace see HERE. Carbing also make a front strut brace that incorporates a stop for the brake master cylinder, this is one of the best front strut braces available. Have you noticed this since fitting the new brakes? I think I remember CW saying that the Supras fitted with the smaller brakes, also have a different master cylinder, so could be due to this. TBH I've never checked mine, so wouldn't know if it moves or not. If yours is visibly moving then one of the above products would definitely help, it should also increase braking power and pedal feel. I have prices for the Carbing strut braces (available in polished alloy or painted steel) and can also get prices for the Cusco brace if you want, just give me a shout. BTW how do the new brakes feel? Link to comment Share on other sites More sharing options...
loks Posted January 5, 2006 Author Share Posted January 5, 2006 Nic, Still bedding the new bigger brakes in, so haven't given them any real welly yet. But having said that they are feeling a little spongy at the moment. Would it be advisable to replace the master cylinder and would this overcome the problem? Is the servo unit larger on the TT than the NA? Calling Chris Wilson.... Although it was dark when looking at this problem, it appears that the front of the servo housing is in fact bowing out and therefore causing the movement. Has anyone else out there that has converted from the smaller standard brake to the larger ones found they have the same problem? Maybe as a test, if someone is about to do the conversion, could they look at the master cylinder movement (if any) when you depress the brake pedal before and after the conversion - yes you will need 2 persons unless you have extremely long and bendy legs... The Cusco "brake stopper" appears to be specific to the Subaru, is this true? Have you a cost yet? The Carbing front strut brace sounds more interesting, any more details and what would be the cost? Cheers for any help. Link to comment Share on other sites More sharing options...
absz Posted January 5, 2006 Share Posted January 5, 2006 slight movement is quiet normally on all cars. if its moving alot its more likely to have a cracked/split bulkhead or loose bolts on the servo mounting point. Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 5, 2006 Share Posted January 5, 2006 No isea on servo size or pressure ratio, sorry. I know that bulkhead and servo body flex add pedal travel and sponginess. Link to comment Share on other sites More sharing options...
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