Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

4 Pages V « < 2 3 4  
 Reply to this topicStart new topic
> Brakes, Stopping with M, A, or S
Root_Werks
post Aug 2 2005, 09:59 AM
Post #61


Village Idiot
*****

Group: Members
Posts: 8,320
Joined: 25-May 04
From: About 5NM from Canada
Member No.: 2,105
Region Association: Pacific Northwest
This is a good thread full of info. I like the reading! Thanks everyone for all the input. (IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Porsche Rescue
post Aug 2 2005, 10:09 AM
Post #62


Saving and Enjoying Old Porsches
****

Group: Members
Posts: 2,978
Joined: 31-December 02
From: Bend, Oregon
Member No.: 64
Region Association: None
Eric, if late '72 (transition) were "one nipple", it is quite possible mine were from a commercial rebuilder and were rebuilt '72 cores installed on a '74. Given their fairly "fresh" look they probably were rebuilt somewhat recently.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Eric_Shea
post Aug 2 2005, 01:47 PM
Post #63


PMB Performance
***************

Group: Admin
Posts: 19,275
Joined: 3-September 03
From: Salt Lake City, UT
Member No.: 1,110
Region Association: Rocky Mountains
QUOTE
Mitte - 'Medium'
(IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)

Middle? (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Eric_Shea
post Aug 2 2005, 01:49 PM
Post #64


PMB Performance
***************

Group: Admin
Posts: 19,275
Joined: 3-September 03
From: Salt Lake City, UT
Member No.: 1,110
Region Association: Rocky Mountains
Jim,

That's what I was thinking too. There's no way a caliper would look that good today so it must be a rebuild. Let me know if you dig in and find otherwise.

Thanks Dan.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ArtechnikA
post Aug 2 2005, 01:56 PM
Post #65


rich herzog
*****

Group: Members
Posts: 7,390
Joined: 4-April 03
From: Salted Roads, PA
Member No.: 513
Region Association: None
QUOTE (Eric_Shea @ Aug 2 2005, 03:47 PM)
QUOTE
Mitte - 'Medium'
Middle?

the words are the same either way...
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Eric_Shea
post Aug 2 2005, 02:28 PM
Post #66


PMB Performance
***************

Group: Admin
Posts: 19,275
Joined: 3-September 03
From: Salt Lake City, UT
Member No.: 1,110
Region Association: Rocky Mountains
So the 914 is a "medium" motor car... we knew that (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Eddie914
post Aug 2 2005, 05:25 PM
Post #67


Unregistered
What are the dimensions of Carrera rotors?

Are there any larger rotors that car be bolted directly to the back of the hub?

Will 968 rotors fit over the hub?

Thanks Eddie
Go to the top of the page
+Quote Post
johnmhudson111
post Aug 2 2005, 07:11 PM
Post #68


Member
**

Group: Members
Posts: 491
Joined: 29-November 04
From: Nesbit, MS
Member No.: 3,191
QUOTE (Mueller @ Aug 1 2005, 10:14 AM)
yes, however, you lose your e-brake....

Here is a question, how difficult would it be to fab up a bracket to relocate the /4 rear caplier so that it would be used as an e-brake only? On the surface it seems to be a workable solution. The only issue I can see is using/getting the correct spacers to widen the caplier for the thicker rotors. You guys know better than I, what do you think? (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ArtechnikA
post Aug 2 2005, 07:52 PM
Post #69


rich herzog
*****

Group: Members
Posts: 7,390
Joined: 4-April 03
From: Salted Roads, PA
Member No.: 513
Region Association: None
it is the application of the service brake that keeps the pads adjusted.

i don't think shrouding the disk with another caliper is a great idea, but i have seen this kind of thing done before -- but it was with a really teeny caliper and a BIG disk.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Eric_Shea
post Aug 3 2005, 10:24 PM
Post #70


PMB Performance
***************

Group: Admin
Posts: 19,275
Joined: 3-September 03
From: Salt Lake City, UT
Member No.: 1,110
Region Association: Rocky Mountains
QUOTE
What are the dimensions of Carrera rotors?


24mm

I really don't have any experience with any other rotors.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
johnmhudson111
post Aug 4 2005, 07:00 AM
Post #71


Member
**

Group: Members
Posts: 491
Joined: 29-November 04
From: Nesbit, MS
Member No.: 3,191
QUOTE (ArtechnikA @ Aug 2 2005, 08:52 PM)
it is the application of the service brake that keeps the pads adjusted.

i don't think shrouding the disk with another caliper is a great idea, but i have seen this kind of thing done before -- but it was with a really teeny caliper and a BIG disk.

Is the concern you have with this method based on the impact the 2nd caplier would have on the rotors ability to disapate heat?

It seems like it would be pretty simple to fab up a bracket to make this work but again, you guys have more experience in this department than I do.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ArtechnikA
post Aug 4 2005, 07:09 AM
Post #72


rich herzog
*****

Group: Members
Posts: 7,390
Joined: 4-April 03
From: Salted Roads, PA
Member No.: 513
Region Association: None
there are two concerns i stated.

1) the brake will not self-adjust. in theory, the pad should experience 'no' wear used as a parking brake; i know the dedicated parking brake in my 911 has received no adjustment in at least 2 years and doesn't seem to need any, so perhaps this is not a serious concern.

2) you reduce (by a fairly significant amount) the surface area of the disk exposed to free-stream air for cooling.

is it bad enough to worry about? no one knows. i'd invest in some Tempilac heat-indicating paint and use *real* good brake fluid during the testing phase if you decide to go this route.

3) you've also increased unsprung weight by a nontrivial amount, but that may not be a horrible thing on a street car either.

frankly, i think i like the small inboard disk and caliper concept a lot better.

so i'm not saying it won't work, or it can't work. IMO the disadvantages outweigh the gains, but there is all kinds of room for experimentation and tinkering. so don't let me talk you out of it if you feel it's worth trying. just please be careful.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
davep
post Aug 4 2005, 10:06 AM
Post #73


914 Historian
*****

Group: Benefactors
Posts: 5,143
Joined: 13-October 03
From: Burford, ON, N0E 1A0
Member No.: 1,244
Region Association: Canada
I saw an interesting parking brake on a 934. On the typical huge rear caliper were a pair of 'wings'. These wings pivoted off the bottom of the caliper, and carried a few square inches of friction material each. The tips of the wings were tied by the parking brake cable, and there was probably a spring in there to spread the wings when the brake was off. This car came fitted like that from the factory, raced at Le Mans, was in the Matsuda collection and is still factory original.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Eric_Shea
post Aug 4 2005, 01:37 PM
Post #74


PMB Performance
***************

Group: Admin
Posts: 19,275
Joined: 3-September 03
From: Salt Lake City, UT
Member No.: 1,110
Region Association: Rocky Mountains
I say go with the strings and wings! (IMG:http://www.914world.com/bbs2/html/emoticons/w00t.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ein 6er
post Aug 4 2005, 05:13 PM
Post #75


Senior Member
***

Group: Benefactors
Posts: 1,115
Joined: 11-February 03
Member No.: 300
Region Association: None
QUOTE (davep @ Aug 4 2005, 08:06 AM)
I saw an interesting parking brake on a 934. On the typical huge rear caliper were a pair of 'wings'. These wings pivoted off the bottom of the caliper, and carried a few square inches of friction material each. The tips of the wings were tied by the parking brake cable, and there was probably a spring in there to spread the wings when the brake was off. This car came fitted like that from the factory, raced at Le Mans, was in the Matsuda collection and is still factory original.

i believe they were 917 calipers. here are some pics on armando's site.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ein 6er
post Aug 4 2005, 06:36 PM
Post #76


Senior Member
***

Group: Benefactors
Posts: 1,115
Joined: 11-February 03
Member No.: 300
Region Association: None
here is a link to the mechanism.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Eric_Shea
post Aug 7 2005, 02:45 PM
Post #77


PMB Performance
***************

Group: Admin
Posts: 19,275
Joined: 3-September 03
From: Salt Lake City, UT
Member No.: 1,110
Region Association: Rocky Mountains
Those look "fairly" easy to mfg.

Any of you machinest (Mueller) types care to take a stab? They could hang off a special spacer made for the M or Carrera caliper (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

4 Pages V « < 2 3 4
Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 16th May 2024 - 08:45 PM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...