Brake caliber question- rebuild?? opinions please

I just got back from doing the DE at the 48 hours of Sebring- great time.
I was pulling brake pads-(85 carrera) to check wear and switch back to street pads. Front outside pad comes out with a rubber ring attached to it- I assume it is the dust seal from the piston.
A Couple of questions please-(newbie alert)
1. I assume I need to have the caliber rebuilt- it was just rebuilt about a year ago. Can I run this for a while- or should I not drive the car until fixed- no leaks or anything.
2. Are rebuilt calibers ok- about $100 apiece.
Are new ones better-safer-etc- about $250 each.
3. If I have to do this anyway- has anyone tried the Boxster front calibers or the Brembo Monoblock system??
Thanks in advance for your help- this list is great
gary

I'm about to rebuild my calipers. Was going to do it today but events conspired to postpone. With the dust boot gone the caliper will get dirty. If they were rebuilt a year ago, they might be pretty easy to rebuild now. Rebuilding is basically just a matter of replacing a couple of rubber pieces on the piston, including the dust boot.

It's just possible that the dust boot was not installed properly last time. The boot should not be contacting the pad, I don't believe.

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'83 SC

This is almost definatly the dust seal. The seal is retained by a circular spring clip and this may not have been fittted properley following the rebuild. I have rebuilt my calipers using the original porsche rebuild kits with no problems. I made sure all the parts were cleaned thoroughly and checked the pistons for marking/scoring. To answer your questions, I think rebuids are fine if done carefully, running your calipers without the dust seals for a short time (month or so) should not be a problem. As for the Boxter brakes ?
Bruce 83 sc

Sounds like the piston seal adhered to the pad. Perhaps the garage used some sort of antivibration material that may of glued your seal to the back of the pad when they got really hot. If you do alot of DE your dust seal will age quickly (1 year) and should be checked for wear. If they are moving freely and recently rebuilt, you can replace just the outer seals. This can be done with the rotors on with a little patience. The fronts are tough, the back very hard to do while on the car. Pulling the calipers will make it easier, but we all know what that entails. Think about some brake cooling for the fronts. AJUSA has a kit which I put on. If you dont want to go through a rebuild, rebuilt ones from a good source are OK, but you will be spending extra money. I been researching into brake upgrades for my car and repeatedly stick with what I have. The boxter or monblock upgrade gives 4 piston brakes upfront and does nothing for the back. It is my belief that your car will then be biased more to the front brakes without the aid of a bias adjustment valve if indeed these brake are more effective. I like how they are balance right know and the pads are cheap and easy to change.

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8 9 9 1 1, The last of the line.

DE events are very hard on calipers. I had to rebuild one of mine 2x this year. I will usually fry the dust boot in one weekend. From the people I have talked to this is quite common.