Quote:
Originally Posted by strictlypersonl
The front caliper piston diameter is 2.375" vs the rear 1.69". In order to get 60% effort to the front (necessary balance under maximum deceleration) the front master must be larger than the rear. (There's some pad-coefficient-of-friction factored in there too. The GM pads are somewhat "stickier" than the Jags'.)
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That's all great in theory but not relavent to to my setup. Although I have xjs/xj6 callipers I don't have original masters due to no booster and small pedal ratio. I checked again and the pedal ratio is actually 2.7:1. Hence the smaller masters.
I don't recall exact size of Pistons on front ,but pretty damn sure there not 60mm. I'm still trying to get someone to tell me the sizes so I don't have to pull them apart to find out. So it's mid 80's xjs/xj12 front and s3 Xj 6 rear. I think 45-48mm. Can someone confirm.
Thanks