Rear brakes and e-brake... Options

[jcd914]

Mid 90's vw passat looks like it may work on vented rotors with possibly an adapter to make the caliper mount correctly.

It has a cable actuated e-brake

I think all the mid 90s VW/Audi rear calipers are single piston floating calipers.
So you would need the single piston to be larger that the 38mm 914/911 pistons to get the same clamping force.
I don't know piston sizes on any of them.
They are good brakes, durable, just nothing spectacular.

Jim

[Elliot Cannon]

I have PMB's alloy 914/6 calipers on my car. Very easy installation. So far, very happy with them. Good product, excellent support. (IMG:style_emoticons/default/welcome.png)

[Socalandy]

PMB 914-6GT calipers on my ride with Stock E-brake cables an lines installed in about 20 min. per wheel (IMG:style_emoticons/default/biggrin.gif)

[edhall]

This is all great stuff. Thanks! I'll spend a bit of time digesting all this, but the 914-6 calipers looks to be the way to go.

[DBCooper]

To all those using brake parts sourced from Rockauto, O'Reillys, your FLAPS, and other non-P-car specialist sources: Please don't drive on streets where I, or anyone I know or like, may be driving. I don't care if you choose to use crap for your brakes, but I DO care that you might hit me when they inevitably fail..............

Thank you for your time ................. The Cap'n

I'm just not hearing about brake failures anywhere in the news.
People hitting the gas instead of the brakes, yes.


KT

That's because there haven't been any. If there had been the National Traffic Safety Administration would be all over it, as would every plaintiff's attorney in the country, not to mention those company's own attorneys and insurance carriers. I think the Cap'n is exaggerating (Krustily) to make a point.

[monkeyboy]

When I first picked up my 914 years ago, the manager told me he could get me all the brake parts I needed. I eventually cancelled my order as they were on permanent backorder.

They may show on the website, but I doubt they actually can get them.

Not that I would go that route again.

[worn]

[quote name='Cap'n Krusty' date='Aug 15 2013, 12:57 PM' post='1909733']
[quote name='Trekkor' date='Aug 15 2013, 12:33 PM' post='1909693']
http://www.oreillyauto.com/site/c/search/B...tkeyword=brakes

O'Reilly has quite a few offerings as well.


KT
[/quot

To all those using brake parts sourced from Rockauto, O'Reillys, your FLAPS, and other non-P-car specialist sources: Please don't drive on streets where I, or anyone I know or like, may be driving. I don't care if you choose to use crap for your brakes, but I DO care that you might hit me when they inevitably fail..............

Thank you for your time ................. The Cap'n
[/quote]

I understand Capn', but I have to point out that the odds of you being hit by a Porsche with OReilly brakes, compared to any other car with OReilly parts are probably similar to shark attack and the lotto cashing in. Think Escalade or Tacoma when you worry. Or perhaps an 80's muscle car. Ever see one of those at Auto Zone? Personally I would rather take my chances with a 914 since I only see them at club meetings. (IMG:style_emoticons/default/poke.gif) (IMG:style_emoticons/default/bye1.gif)

[worn]

[/quote]

SC parts will be even more difficult to fit. The bearing is larger and the hole diameter won't line up with a 914 control arm.

I think you're asking for a comparison of the SC rear caliper you have an the 914-6 and or our reproduction so, here goes.

Same piston size 38mm
Same pad size FSMI D31
Nose section is cast from the same casting, just machine out the hole for the adjuster
914-6 variants have adjustable pistons/pad clearance
914-6 variants have integrated handbrake
Our reproductions are under 3lbs each saving a total of 8lbs.
Fastener size on the 911 and 914-6 caliper is M7. Our reproduction is M8
Stock is cast steel
Ours is cast aluminum

I can barely pour my own beer let alone molten metal (IMG:style_emoticons/default/blink.gif)
[/quote]
I have the whole SC front suspension with spindles, so I think that should work - eh?

So similar characteristics in terms of braking, but the SC would be a PITA in terms of fiddling and also heavy. You are tempting me. I pour aluminum in the driveway as an amusement, but have bought more safety equipment since my son got burned with a little tiny piece. Thanks Eric!

[914_teener]

[quote name='worn' date='Aug 16 2013, 10:39 AM' post='1910295']
[/quote]

SC parts will be even more difficult to fit. The bearing is larger and the hole diameter won't line up with a 914 control arm.

I think you're asking for a comparison of the SC rear caliper you have an the 914-6 and or our reproduction so, here goes.

Same piston size 38mm
Same pad size FSMI D31
Nose section is cast from the same casting, just machine out the hole for the adjuster
914-6 variants have adjustable pistons/pad clearance
914-6 variants have integrated handbrake
Our reproductions are under 3lbs each saving a total of 8lbs.
Fastener size on the 911 and 914-6 caliper is M7. Our reproduction is M8
Stock is cast steel
Ours is cast aluminum




I can barely pour my own beer let alone molten metal (IMG:style_emoticons/default/blink.gif)
[/quote]
I have the whole SC front suspension with spindles, so I think that should work - eh?

So similar characteristics in terms of braking, but the SC would be a PITA in terms of fiddling and also heavy. You are tempting me. I pour aluminum in the driveway as an amusement, but have bought more safety equipment since my son got burned with a little tiny piece. Thanks Eric!
[/quote]



(IMG:style_emoticons/default/shades.gif)

[worn]

[/quote]



(IMG:style_emoticons/default/shades.gif)
[/quote]

Well, yeah you are right. But he did get training in engineering school that I shelled out a lot of money for. There he poured a little V8 block.

[Trekkor]

http://www.cardone.com/products/brakes

I trust this company.
I have used many of their parts.

Their calipers are on my race car.

They have been in business since 1970~


KT

[Trekkor]

Front:

https://sphotos-a.xx.fbcdn.net/hphotos-prn1...920384005_n.jpg

Rear:

https://fbcdn-sphotos-g-a.akamaihd.net/hpho..._50900697_n.jpg


KT

[Eric_Shea]

I have the whole SC front suspension with spindles, so I think that should work - eh?

So similar characteristics in terms of braking, but the SC would be a PITA in terms of fiddling and also heavy. You are tempting me. I pour aluminum in the driveway as an amusement, but have bought more safety equipment since my son got burned with a little tiny piece. Thanks Eric!

Lets see if we can get this quote thing right... (IMG:style_emoticons/default/biggrin.gif)

The SC front would work. If it's for street and occasional autocross, i would just use the struts and not the A-Arms and crossmember. Keep in mind, the A-Caliper associated with that is the heaviest caliper ever used on a Porsche.

The rears are essentially the same. Same piston same pad and parts of the calipers even come out of the same mold.

Yes, the rear handbrake mechanism is more trouble than it's worth. I would get about 1/2 way through grinding one arm before I decided to go 914-6 calipers in the rear but that's just me. Then you have to fit the parking brake, have the holes elongated etc. A 70-73 handbrake assembly would bolt on with more grinding and more welding and custom cables etc. Again, I would opt for a 914-6 caliper that bolts on vs. all of that.

[worn]

The SC front would work. If it's for street and occasional autocross, i would just use the struts and not the A-Arms and crossmember. Keep in mind, the A-Caliper associated with that is the heaviest caliper ever used on a Porsche.

So, I am thinking you have a set of great rear brakes, but what do I want in front where the weight reads up? If the a calipers are too heavy, what is better? I just looked at your site and saw rears. Oh that is tempting given the smilies we have available.

[Eric_Shea]

I like S-Calipers. But they're expensive. Otherwise, stay with a 3" strut an go Brembo. At 4lb 6oz they are the lightest.

http://www.pmbperformance.com/catalog/item...645/6862358.htm

[ChrisFoley]

... stay with a 3" strut an go Brembo. At 4lb 6oz they are the lightest.

http://www.pmbperformance.com/catalog/item...645/6862358.htm

You've been busy. That's an excellent choice!
(IMG:style_emoticons/default/beerchug.gif)

[Steve]

Eric's solution is the way to go. IMHO, to go with 911 rear e-brakes you need to weld a hefty stopping brace to the trailing arm, let alone the additional cable mods. I had Wes (rip) weld some thick braces to my trailing arm. Similar size and structure to a 911 trailing arm. I then used early 911 e-brakes and Boxster rear brakes. For the cables, I used modified 914 clutch cables. It only pulls from one side, but works fine. Regarding the brace there is a bolt on available, but I am curious how strong it is in case of an emergency. If your going 60 plus miles an hour and yank on the emergency brake, will it rip off? The brace prevents the shoes from ripping apart and spinning on the axle. I only went with this solution because Eric's solution wasn't available at the time.

[ChrisFoley]

Eric's solution is the way to go. IMHO, to go with 911 rear e-brakes you need to weld a hefty stopping brace to the trailing arm, let alone the additional cable mods. I had Wes (rip) weld some thick braces to my trailing arm. Similar size and structure to a 911 trailing arm. I then used early 911 e-brakes and Boxster rear brakes. For the cables, I used modified 914 clutch cables. It only pulls from one side, but works fine. Regarding the brace there is a bolt on available, but I am curious how strong it is in case of an emergency. If your going 60 plus miles an hour and yank on the emergency brake, will it rip off? The brace prevents the shoes from ripping apart and spinning on the axle. I only went with this solution because Eric's solution wasn't available at the time.

911 and 914 cable operated braking mechanisms are just parking brakes.
They really aren't designed to handle the loads imposed in an emergency braking situation. Additionally, a true emergency brake handle wouldn't lock in position, which would be dangerous.

My 911 "e-brake" conversion kit is a weld on solution which works just fine, but I wholeheartedly endorse using Eric's calipers.
They simply bolt on and work just as the factory calipers did, without additional modification. Its sensible and economical. (IMG:style_emoticons/default/smile.gif)

[Steve]

I agree and if someone wanted to go down the 911 e-brake path yours is the best solution, however on steep hills like in San Francisco or where I live, I use the e-brake to prevent the car from rolling backward. Also 30 years a go in a different 914 i had a catastrophic brake failure where the brake pedal went to the floor and my only choice was to hold the button in on the e-brake handle to stop. Scared the crap out of me. Funny how the 914 and 911 manual call it a hand brake. Maybe its a German thing!!

[Jeff Hail]

Eric's solution is the way to go. IMHO, to go with 911 rear e-brakes you need to weld a hefty stopping brace to the trailing arm, let alone the additional cable mods. I had Wes (rip) weld some thick braces to my trailing arm. Similar size and structure to a 911 trailing arm. I then used early 911 e-brakes and Boxster rear brakes. For the cables, I used modified 914 clutch cables. It only pulls from one side, but works fine. Regarding the brace there is a bolt on available, but I am curious how strong it is in case of an emergency. If your going 60 plus miles an hour and yank on the emergency brake, will it rip off? The brace prevents the shoes from ripping apart and spinning on the axle. I only went with this solution because Eric's solution wasn't available at the time.

I miss Wes. Good man down.