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Join Date: Jan 2018
Location: Rancho Capistrano, Ca
Posts: 30
Brake pressure switches blowing out

Not sure if an upgrade is available.
I have blown out 3 times now my brake pressure switches off the master cylinder.
It does not leak at the threads, but out the top of the switch around the electrical connectors.
I autox/track a 911SC with upgraded suspension, but motor and brakes are stock.

I do run sticky Toyo R888’s, and drive pretty aggressively. This started when I switched to these tires.

On the occasion I spin and have both feet in to stop the car, the problem arises afterwards. I am obviously stomping the brake pedal hard during these excursions.

1) is there an upgrade that can handle higher pressures?
2) or, do I stop doing leg squats to weaken my legs as to not press the brake pedal so hard?
3) Still working on being a better driver so I do not spin, but in the meantime would be great to have a solution.

Thanks for any input.

Old 11-03-2025, 07:15 PM
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Join Date: Jun 2024
Location: Wheatridge, CO
Posts: 44
I had the URO brake switch leak at the top like this. Replaced with ATE part and all is fine. What brand are you using?

The ultimate option would be to plug the brake switch ports and install a mechanical switch on the pedal.

Sounds like you have a big brake pedal to fit both of your feet on there?

-Kelly
Old 11-04-2025, 08:48 AM
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Join Date: Jan 2018
Location: Rancho Capistrano, Ca
Posts: 30
Thanks Kelly,
Did not think about mechanical switches. I did order the ATE versions this time around cannot remember what I had last time.
When I said both feet in… I meant one on the clutch and one on the brake pedal as I’m spinning around in circles lol…
Thanks for your input, I was just curious what others of experienced if any and advice like yours.

Old 11-04-2025, 11:24 AM
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