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First the very common crack on center muffler. Took it off yesterday and left it with a good welder to see if he can fix it. Crack all along the seem and a few cracks
Last season I had a few brake related problems. ABS light that cut a few track days short.
So decided to do a long overdue brake renovation.
Here are some pics of piston and pucks that needs replacing,
Cracked puck
Puck fell out when pads where removed
I’ve decided to go with upgraded steel brake lines and install new ABS sensors.
However I would like to get your advice on rebuild kits?
Racing brake has a rebuild kit. $$$ Pricey. Came up to 850dollars for front and rear including high temp dust shields.
Anyone else that have found a good rebuild kit including pistons?
I have used the Racing Brake stainless pistons on two different 911's. They are excellent quality. I would avoid the silicone high temp dust shields until you have burned off any brake fluid that got on the area during the rebuild. If they get even a TRACE of brake fluid on them they will disintegrate in short order. On my GT3 I just used the standard boots. No problems so far after 1 year and many track days.
I have used the Racing Brake stainless pistons on two different 911's. They are excellent quality. I would avoid the silicone high temp dust shields until you have burned off any brake fluid that got on the area during the rebuild. If they get even a TRACE of brake fluid on them they will disintegrate in short order. On my GT3 I just used the standard boots. No problems so far after 1 year and many track days.
Thanks Nick,
Good news with Racingbrake and thanks for the heads up on the dust shields. I went back to their web site and it was stated further down the page about the silicone sensitivity to brake fluid.
I've also been thinking about getting the racing brake kits and have read other threads on them. Seems like they are high quality but high priced and maybe they oversell the benefits.
I always wondered how in the world one would keep brake fluid off the high temp silicone seals - they are brakes! Brake fluid gets all over doesn't it?
I've also been thinking about getting the racing brake kits and have read other threads on them. Seems like they are high quality but high priced and maybe they oversell the benefits.
I always wondered how in the world one would keep brake fluid off the high temp silicone seals - they are brakes! Brake fluid gets all over doesn't it?
There shouldnt be brake fluid around the outside of the pistons. If the calipers don’t leak.
But, good point from Nick in previous post. When you rebuild the calipers its probably very hard to keep the dust seals 100% fluid free. Probably a good idea to run a set of rubber dust seals until they crack and then change to the blue silicon seals?
mine is a 996gt3 with an M&M aftermarket exhaust system.
Pretty common these crack when you delete the side mufflers. Picking up the muffler tomorrow and will hopefully have time to reinstall it over the weekend.
There shouldnt be brake fluid around the outside of the pistons. If the calipers don’t leak.
But, good point from Nick in previous post. When you rebuild the calipers its probably very hard to keep the dust seals 100% fluid free. Probably a good idea to run a set of rubber dust seals until they crack and then change to the blue silicon seals?
True but... I have just found it about impossible not to get a trace of brake fluid on the silicone boots when assembling. I try to limit my use of brake cleaner during a rebuild b/c it will eat the paint from painted calipers and will dull the gloss of powder coated caliipers. Literally a fingerprint of brake fluid in my experience will result in the silicone seals disintegrating.
My idea on my GT3 brakes when I built them last year was to put the standard seals in, burn off any traces of fluid during my first set of pads, then when I need to change pads I can swap to the high heat silicone seals. I just haven't gone through a set of pads yet.
True but... I have just found it about impossible not to get a trace of brake fluid on the silicone boots when assembling. I try to limit my use of brake cleaner during a rebuild b/c it will eat the paint from painted calipers and will dull the gloss of powder coated caliipers. Literally a fingerprint of brake fluid in my experience will result in the silicone seals disintegrating.
My idea on my GT3 brakes when I built them last year was to put the standard seals in, burn off any traces of fluid during my first set of pads, then when I need to change pads I can swap to the high heat silicone seals. I just haven't gone through a set of pads yet.
I will definitely follow your advice,
Does anyone know the price difference between the Motorsport pistons and Racing brake.
I tried the search function but came up empty
Is there any difference between the Motorsport calipers and normal? I haven’t looked closesly at my cup car calipers but they run the same ceramic pucks as the road car. I figured they’re the same. I believe Demonspeed are currently looking into a similar material to manufacture new replacement pucks. From what I’ve read on here, seems this is the most preferable option, however pucks not currently available separately.
The cracked pucks are very common especially with track use, and that issue alone is not a big deal. The most important thing is to look for fluid leaks or if the pistons get stuck. Even if you replace the dust shields they will look the same after repeated track usage.
I did the rebuild to put in new seals. The original ones looked pretty good. I put in new dust boots & seals (non-oem - concentric). Replaced a few of the pucks which are almost impossible to find. Inspected and cleaned the pistons. It is a bitch to get the pistons out.
01-31-2019, 06:53 AM
Winter DIY
