OK, people are staring at me every time I stop. I have the S4/951S front calipers and three sets of pads (stock, pagid orange, and carbon) and they all squeel like a murdered pig. I'm going to the dealer on Monday to get the anti squeel backing plates. Anyone know what that part# is? I can't seem to locate it on the PET.

Thanks in avance!

Tifo

 

951.351.089.04

please let me know what they run you (post here).

Thanks
Matt

 

4 each of 951-351-089-04 for scraper ring design.
4 each of 951-351-089-03 for protection cap design.

The scraper ring design was used through 1989.

 

Thanks guys. I'll head down there monday and report back with cost.

Um....ok.....what is "scraper ring design" and "protection cap design"?

Thanks again,

Tifo

 

have you tried some anti seize on the pads?
j

 

Tifo

A full explanation can be found here:

<a href="http://prospeedmotorsport.com/caliper_parts.htm" target="_blank">http://prospeedmotorsport.com/caliper_parts.htm</a>

The anti-squeel devices are different in that the 951...04 design is the heavy steel cylinder-in-piston device and the 951...03 is a lighter spring type device. I only have experience with the "04" type and I can say they work. That said, Porsche updated them for a reason. With either device, it makes it impossible to swap out pads on the track w/ out unbolting the caliper since they adhere to the pads.

Tom Pultz is really the brake expert here and has always answered email questions I've had w/ brakes in the past - should you want the strait scoop on how the "03"s work.

Hope that helps

 

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Matt Sheppard:
<strong>The anti-squeel devices are different in that the 951...04 design is the heavy steel cylinder-in-piston device and the 951...03 is a lighter spring type device.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">The vibration dampers for the S4 type calipers are a unique design. Both the 04 and 03 designs are 1-piece assemblies... a rectangular plate with two metalic cups attached. The only difference is the size of the cups that fit inside the pistons, and this is why you need to know what design you have. Scraper ring or protection cap just refers to the type of piston seals and outward appearance of the pistons.

Dampers for the stock turbo or S2 calipers, or for the big reds use a separate round damper for each piston. Since I have my brakes all torn apart now, I'll take some pictures and post them soon.