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On 12 Dec 2002 at 20:14, Keith Park wrote: > If you take off the rear drum brakes and put on rear disc's and change > nothing else the pedal pressure goes way up... That would depend completely on how well you had chosen the size of the new rear caliper pistons. Properly done you should not be able to tell any difference. > In my 88 RX7, with its 4 wheel disc's and fancy 4pot front calipers... if I > lose power assist I can STAND on the brake pedal and feel little more than > youd feel pulling the emergency brakes! That's because the MC piston size was chosen for power assist. It's a different kind of proportioning: master/wheel proportioning as opposed to F/R proportioning. If you replaced your RX7 MC with one with a much smaller diameter then you would be fine again. But, yes, it is always frightening to lose your power assist suddenly if you are used to having it. I had the engine in our family Buick die one night 40 years ago as I was going around some hairpin turns. I suddenly get a "crash" course in how much work the power steering had been doing all along. Same story with the brakes.... -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/