Reply to "Deto. alloy GT5 brake set problems"

A few questions: did the conversion include a new master cylinder? Because adding bigger calipers will take more volume of fluid to pressurize the bigger pistons. Running a too-small master can give symptoms like this, as can a leaky vacuum booster diaphragm. And which pads are you running? Some pads are really hard, and thus last a long time on the street, but take a little more effort on the pedal to stop you, especially if they're cold. There are stickier pads available. Finally, is it possible the pads are simply glazed? This is the cheapest thing to fix, since all thats required is to take the pads out and lightly sand them, then replace them and go drive the car. If stopping is improved, good. Maybe a fast trip thru the mountains will bed them in better.