Hydraulic parking brake options

[IMR-Merlin]

Anyone have any suggestions on running a hydraulic parking brake on my 930?

$300 for new parking brake cables is a bit high. I have seen hydraulic units used before, but can't find the site.

[ficke]

I never had a hydraulic parking brake on a Porsche.
But I did have one ( after market of course) on a Chevrolet truck and it was fine for about 12 hours, maybe more, but it always bled down, which of course means it released.
I think there is a good reason that no automotive manufacturer has a hydraulic parking brake on their products.
My advice would be to buy the cables, the peace of mind is worth it.

[Miguel Antonett]

Please don't.

[IMR-Merlin]

Originally Posted by Miguel Antonett

Please don't.

You have any parking brake cables laying around? I am all set with paying $320 for cables including shipping.

[IMR-Merlin]

Plus if I build a shifter tower, I will not be able to use the parking brake.

So I was thinking about something like this.

Park-Lok Hydraulic Brake - Speedway Motors, America's Oldest Speed Shop

[gumba]

I have one in my VW bus. It bleeds down and releases after awhile. I also think they are illegal in some states. I've seen them with a solenoid, which sounds like a better idea, but you would need to check the power draw.

[brcorp]

Careful of the fine print

The Speedway Park-Lok is a hydraulic
lock that uses the line pressure of the
system to hold your brakes locked. THE
PARK-LOKWILL RELEASE
AUTOMATICALLYWHEN THE
PRESSURE IN THE LINE DROPS. Check
your system carefully for leaks or damage
that could cause an unexpected release.

[IMR-Merlin]

Originally Posted by brcorp

Careful of the fine print

The Speedway Park-Lok is a hydraulic
lock that uses the line pressure of the
system to hold your brakes locked. THE
PARK-LOKWILL RELEASE
AUTOMATICALLYWHEN THE
PRESSURE IN THE LINE DROPS. Check
your system carefully for leaks or damage
that could cause an unexpected release.

I read the fine print, I would only want this for running a turbo timer and such.

[pkabush]

Originally Posted by ficke

I never had a hydraulic parking brake on a Porsche.
But I did have one ( after market of course) on a Chevrolet truck and it was fine for about 12 hours, maybe more, but it always bled down, which of course means it released.
I think there is a good reason that no automotive manufacturer has a hydraulic parking brake on their products.
My advice would be to buy the cables, the peace of mind is worth it.

We have an 07 VW Passat that has a factory hydraulic E-brake. Works great.
Wish I had it in my 930 for the Hargett.

[ficke]

Originally Posted by pkabush

We have an 07 VW Passat that has a factory hydraulic E-brake. Works great.
Wish I had it in my 930 for the Hargett.

Shows how dated I am.
I was taught to never trust hydraulics, always use jack stands or lock hydraulic lifts etc.
Rules are different now for some of the new stuff.

[GJF]

Most hydraulic shops make custom cables for all different applications. I have been toying around with the idea of machining a disc rotor on the drive flange opposite the starter side of the transaxle and use a wilwood mechanical caliper. Still tinkering this idea in my head.

[IMR-Merlin]

Originally Posted by pkabush

We have an 07 VW Passat that has a factory hydraulic E-brake. Works great.
Wish I had it in my 930 for the Hargett.

Is that a separate system or a line lock?

[OldSpool87]

Could you (would you want to) replicate the system used on the 991? I believe it's electromagnetic. I drove one about a year ago and thought the e-brake actuation was really slick…just a thought.

[krasuskyp]

Originally Posted by pkabush

We have an 07 VW Passat that has a factory hydraulic E-brake. Works great.

Lies! LIES!!!

I cannot STAND cars w/ switch-style ebrakes... renders ebrake shenanigans and debauchery unpossable!!! (ohsomostespecially missed in my Hurtz rentals!!!)

curse those infernal bastardz who implemented such tortuous punishment devices!!!

SCOFF!!!

[lin7310948]

brendon sent you a private message.

[Miguel Antonett]

Originally Posted by IMR-Merlin

You have any parking brake cables laying around? I am all set with paying $320 for cables including shipping.

Unfortunately no, but willing to help you out to find them instead of going the hyd route... It is really unsafe to me, a brick would be more reliable. M2c

[full quack]

I put a drag race "Line-Lock" starting line brake lock on my 1966 Mustang, installed on the rear brakes instead of the drag race intended front brakes. Works and stays on until the juice in your battery drops to around 6-7 volts, then it slowly releases pressure. Works for about 4 days just sitting in the garage with the "Line-Lock" activated.
I did this because of an installation of 4 wheel disc brakes, long before anybody had KITS out there, that were more sophisticated.
Just a possible option for you.

Mark

[pkabush]

Originally Posted by IMR-Merlin

Is that a separate system or a line lock?

I'm not sure. I'll try to look into it this evening.

[JohnJL]

The OMP handle is a couple of hundred, plus the master cylinder, lines etc. It will cost more than 320 for proper cables and may be illegal.

Hydraulics are alzo more fun and allow you to drop some unsprung weight which is why i put it in the autocross car. I havent plumbed in the lines yet so I dont know if it will bleed down or will hold.

[IMR-Merlin]

Well a fellow pelican that I have bought stuff from before chimed in per PM and has a set of cables that I can have for shipping costs..... if he can find them...

Now the next question. Cadmium or Zinc plated steel tube that is in the trailing arm, is that part of the parking brake cable? The cable ran through it, but there was no way to get the cable out. There looks to be a plastic insert in there that keeps the "fork" of the parking brake cable from coming out. So I had to cut the (corroded) cables off to have my wheel bearings serviced.