Pelican Parts Forums - SC Brake Booster Revisited 2022

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- - SC Brake Booster Revisited 2022 (http://forums.pelicanparts.com/porsche-911-technical-forum/1122895-sc-brake-booster-revisited-2022-a.html)

I'm surprised with this being a common issue with a hefty price point for just a booster or rebuild someone hasn't made an adapter plate and ran a mechanical master cylinder, similar to Patrick motor sports fancy dual master setup.

My booster sticks and has been driving me insane as well, I will most likely design a plate and run a mechanical Wilwood to eliminate the booster entirely.

@rwel, Thanks for the update. I actually drove the 911 yesterday for the first time in months and sure enough, the brakes were sticking on again. I have a spare booster I may send to Zims.

Quote:

Originally Posted by MarkWard (Post 12320397)

@rwel, Thanks for the update. I actually drove the 911 yesterday for the first time in months and sure enough, the brakes were sticking on again. I have a spare booster I may send to Zims.

Hey MarkWard - sorry to hear about sticking brakes again. Thanks for updating on this thread, I've been monitoring this discussion.

Earlier this week, I finally installed my new MC back into the car and successfully bled both the MC (on the bench) and then the brake lines.

I haven't had time to drive it yet to test out the brakes and new MC, but am prepared for possibility that my brakes will stick again. Then, explore the Zims option.

Quote:

Originally Posted by rwel (Post 12320356)

My brake booster came back from Zim's Autotechnik in just about 3 weeks, (Dennis at Zims said expect 2-4). This was not an exchange, but my original unit rebuilt and repainted gloss black. Zim's warranties parts for 1 year, but Dennis Butts said they had used the same rebuild service for years and had not had one returned. Zim's price was $470 plus $20 insured shipping. I reinstalled it with a new ATE master cylinder. The system is working properly now, based on a 45 minute test drive.

As previously posted, I had no luck finding a vendor for Cardone's service, despite many phone calls, and other options were more expensive than Zim's. I was reluctant to try the repair myself, because my master cylinder had leaked badly into the booster internals, and it was likely new internal parts would be needed and I could find no source for those.

In any case, I was happy to find Zim's and I'm very satisfied with the rebuilt booster. Dennis was very easy to work with. I took pictures, but basically the booster looks like I imagine it did new.

My experience with Zim's and Dennis was very similar. Two thumbs up.

@rwel - congrats on getting your MC and BB sorted out! Thanks for posting update and your experience w Zims here.

I installed a new ATE MC as well. For the BB I drained/cleaned as best as I could (w/o opening the BB assembly). So not sure if brakes will stick again, but am prepared for that possibility. Then, go the Zims route.

QUESTION: When you got back your BB from Zims, did they mask/cover the blue ATE sticker on the body before they painted it? Or did they paint over the sticker?

Thanks!

Quote:

Originally Posted by rwel (Post 12320356)

Zim's booster rebuilder covered or otherwise masked off the blue ATE sticker prior to repainting the unit. The black paint looks alright, considering what it is and where it sits in the frunk. My car is a driver, not a show car. Honestly, I might have improved on the paint via patient surface prep, multiple coats, etc, but I am ok with the appearance. It looks like maybe they didn't let it dry thoroughly before wrapping it and sending back to Zim's. Mine had lost the rubber bellows-looking cover to protect the clevis end of the assembly, and they replaced it.

http://forums.pelicanparts.com/uploa...1726686991.jpg
http://forums.pelicanparts.com/uploa...1726687012.jpg

I was, and remain, a bit shocked at the cost to repair the booster, or replace it with new. Another example of the "Porsche tax", I suppose. I will sheepishly admit I unknowingly drove it for over 2 years without boost (you compensate...no worse than 60's Jags or MGs I grew up with) and it sure takes less effort now.

Having fixed my brakes, I'm moving on to other projects and might not regularly check this thread. If anyone has another question I can answer, feel free to message me. Cheers.