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Old 03-28-2017, 03:20 AM   #1
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brake-locking anti-theft mod

Hi guys,

Not sure if this is the place to ask, but I discovered (the worst way possible) that my car has a strange mod.

Apparently the previous owner installed a key under the dash that locks the brakes.

I always assumed it was a ignition electrical cut type thing...

I only discovered this cause I was showing the car to a friend, he fiddled with it without my knowledge. When I tried to move the car wouldn't budge.

This involved getting a special trailer that could support the front wheels of the car and towing it to a Porsche Centre, where they discovered this.

I will be getting my car back later today but wondering if someone could share some details on this type of mod.

Thanks
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Old 03-28-2017, 03:33 AM   #2
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I have seen some interesting alarms in my day, but never a lock for the brakes. I would imagine that it could be easily removed by the mechanic.

Where are you in Portugal? My father's family was from Viseu, and my grandmother still has a house outside Fatima. Some of the roads out there in the mountains are incredible.
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Old 03-28-2017, 03:39 AM   #3
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Originally Posted by alm001 View Post
I have seen some interesting alarms in my day, but never a lock for the brakes. I would imagine that it could be easily removed by the mechanic.

Where are you in Portugal? My father's family was from Viseu, and my grandmother still has a house outside Fatima. Some of the roads out there in the mountains are incredible.
Hi there,

I'm from Porto, Portugal

You should come visit, I love my country

In regards to the mod, I was thinking on leaving it on, if it actually works and it doesn't present a security problem, thoughts?
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Old 03-29-2017, 01:41 AM   #4
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I've decided to keep the mod.

After messing with it a bit, it works like this :

Key inserted, turned all the way to the left, pressure is released from the brakes.

Key out or turned all the way to the right, pressure is applied to the front wheels. Car won't budge..

The chief mechanic @ Porsche Center thought it was a clever mod. Suggested I left it on. He said there's an extra tube in the brake cylinder for this. Shame he didn't take any pictures while investigating.
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Old 03-29-2017, 09:51 AM   #5
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Originally Posted by peppp View Post
Hi there,

I'm from Porto, Portugal

You should come visit, I love my country

In regards to the mod, I was thinking on leaving it on, if it actually works and it doesn't present a security problem, thoughts?
I've been! We made the drive up north to visit your exact region about 5yrs ago now.



I'm glad you got your car sorted.
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Old 03-29-2017, 02:06 PM   #6
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That is an interesting mod
Can you post some pics?
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Old 03-29-2017, 03:01 PM   #7
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Very interesting mod indeed. I'd like to hear more about this too.

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Old 03-30-2017, 02:47 AM   #8
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Sadly no picture was taken by the engineer.

I wonder if it's something like this :

https://www.google.us/patents/US4873824

Have a look at the schematics.
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