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Hi, I run 944T Brembo 4pots, front and rear. I'm still using the stock master cylinder and I can confirm that it DOES displace enough fluid for proper operation. Absolutely no sign of any bias problems. However, I only have less than 50bhp and I'm losing some brake energy in the old flexi-hoses and will be fitting Goodridge braided replacements. This may reveal any bias issues........fingers crossed!
One thing I've noticed on my voltmeter, I can see the volt-drop across the brakelights and in normal, slow braking conditions, like moving upto a busy junction. The pedal effort required to activate the pressure switch is much higher. I can stop my car without the brakelights coming on. I intend to fit a reed switch and relay to the pedal, in paralell with the pressure switch. Less hassle than going through a box of old switches to find a weaker one, eh?
'hope this helps,
Matt \X/
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