 914/6 rear caliper spacers, one solution |
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| michel richard |
 Jan 15 2006, 08:39 PM
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#1
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Senior Member  Group: Members Posts: 1,291 Joined: 22-July 03 From: Longueuil, Québec Member No.: 936  |
In the process of restoring my 914/6, I want to have vented rear rotors, mostly because I'm going to have a big engine, but also because I think it's kinda cool.
The stash of parts I bought from Jon Lowe contained some rebuilt original 914/6 rear calipers. It also contained some good condition 911 front calipers "A" calipers I think: 3 inch bolt spacing, steel, and with a spacer. They had 48 mm pistons. To build rear calipers that have a spacer, there is one recipe that uses the spacers from the rear of 911 mid-year calipers, as well as other hardware. Those spacers are 10 mm. I don,t have such calipers and initial attempts at getting some were unfruitlful. So, I took the spacers from the front calipers that I have, but they're 7.5 mm thick. Attached image(s) 
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| michel richard |
Jan 15 2006, 08:41 PM
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#2
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Senior Member Group: Members Posts: 1,291 Joined: 22-July 03 From: Longueuil, Québec Member No.: 936 |
I figured it might be easier to simply add a second thin spacer, rather than build a thicker one. Not sure it's going to be the final solution, but I had the thin stock handy. This is really a test piece:
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| michel richard |
Jan 15 2006, 08:41 PM
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#3
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Senior Member Group: Members Posts: 1,291 Joined: 22-July 03 From: Longueuil, Québec Member No.: 936 |
and:
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| fiid |
Jan 15 2006, 08:41 PM
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#4
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Turbo Megasquirted Subaru Member Group: Members Posts: 2,827 Joined: 7-April 03 From: San Francisco, CA Member No.: 530 Region Association: Northern California |
A calipers are 3.5" spacing (and made of steel).
If you have 3" spacing calipers that are on vented rotors they are probably M-calipers. |
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| michel richard |
Jan 15 2006, 08:44 PM
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#5
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Senior Member Group: Members Posts: 1,291 Joined: 22-July 03 From: Longueuil, Québec Member No.: 936 |
and bolted up.
As far as I'm able to measure, the two spacers clamped together end up being 10.3 mm thick. Close enough. I still need to find some 7mm bolts that are 70 mm long. There's a good hardware store that I use, in town, but they did'nt have any in stock. Apparently they can get me some, in socket head format. Also, the spacers have 8mm holes in them, but the 914-6 rear caliper uses 7 mm hardware, as noted above. Does anybody know the hole size in the spacers for the mid-year rear 911 calipers ? Couple more things I will need will be the little rubber O-rings and the retainer spring. Attached image(s) 
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| michel richard |
Jan 15 2006, 08:45 PM
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#6
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Senior Member Group: Members Posts: 1,291 Joined: 22-July 03 From: Longueuil, Québec Member No.: 936 |
Finally I'll need to turn some longer pad retaining pins. It's a very simple turning and should not be a problem.
Not sure what I'll end up doing. Stay tuned. Michel Richard |
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| michel richard |
Jan 15 2006, 08:46 PM
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#7
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Senior Member Group: Members Posts: 1,291 Joined: 22-July 03 From: Longueuil, Québec Member No.: 936 |
They're M calipers, then. Thank you. |
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| Eric_Shea |
Jan 15 2006, 11:38 PM
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#8
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PMB Performance Group: Admin Posts: 19,275 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains  |
Michel... (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif)
Just do it right... (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) Rear 911 calipers are a dime a dozen. Years 70-84 oughta do the trick (not too many years to choose from). 6 o-rings per caliper? Hours fiddling with 2.8mm spacers? You should be able to find a core set for $50-70 bucks... what's your time worth? Also, 7mm hardware will be difficult (unless you get the $50.00 core 911 rear brakes, in which you can use that hardware and it's a perfect match to the hardware that was on your $1000.00 calipers!), so now your talking hardware store hardware for 914-6/GT calipers? (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/blink.gif) This is a serious car your putting together, those are some of the most sought after brakes in 914dom. I'd hate to see you move forward with that concoction, especially on something as important as 'brakes'. Please someone, send this man some toasted rear M-Calipers. (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif) (sorry... I hope I don't offend. It's just my $0.02 and sometimes I don't know when to shut up) E. |
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| Eric_Shea |
Jan 15 2006, 11:52 PM
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#9
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PMB Performance Group: Admin Posts: 19,275 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
Forgot...
Yes... but I'm not going to tell you (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)
I stock both, but the o-rings only ship in 8 packs!! (IMG:http://www.914world.com/bbs2/html/emoticons/lol3.gif)
My prayer for you little buddy (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) Dear God, please help guide Michel through these troubled times. Please help him make the right decisions for his bare tub 914-6 restoration. Please help him see the value in his 914-6/GT calipers and the wisdom of the ATE engineers. If he does go to the hardware store to get fasteners please make sure it's 11.8 and it won't sheer under pressure sending him plumeting down some remote Canadian mountainside. Please watch over our little friend to the North. Amen. |
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| goose2 |
Jan 16 2006, 12:00 AM
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#10
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Senior Member Group: Members Posts: 976 Joined: 30-March 05 From: Eugene, Oregon Member No.: 3,847 Region Association: Pacific Northwest |
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| michel richard |
Jan 16 2006, 01:27 AM
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#11
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Senior Member Group: Members Posts: 1,291 Joined: 22-July 03 From: Longueuil, Québec Member No.: 936 |
Eric,
okay, okay, I'll do it right. I got your point, and you're correct. Michel |
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| 736conver |
Jan 16 2006, 01:50 AM
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#12
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Advanced Member Group: Members Posts: 2,117 Joined: 25-May 03 From: SE Wisconsin Member No.: 736 Region Association: None |
Michel
I think I have the spacers and pins you need. I will check in the tomorrow. Send me an email of evrything you need though. |
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| michel richard |
Jan 16 2006, 06:22 AM
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#13
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Senior Member Group: Members Posts: 1,291 Joined: 22-July 03 From: Longueuil, Québec Member No.: 936 |
Brian,
Email sent. Cheers |
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| Phoenix-MN |
Jan 16 2006, 07:18 AM
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#14
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Senior Member Group: Members Posts: 927 Joined: 23-January 04 From: ST. Bonifacius,MN Member No.: 1,590 |
Has anyone ever checked to see if the parts from a Ferrari 308 would work? They are suppose to be the same caliper from ATE.
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| michel richard |
Jan 16 2006, 09:29 AM
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#15
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Senior Member Group: Members Posts: 1,291 Joined: 22-July 03 From: Longueuil, Québec Member No.: 936 |
As I understand it, it's the Ferrari guys who come and raid our calipers and parts, not the other way around. Ferrari parts are even more expensive than ours.
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| Eric_Shea |
Jan 16 2006, 11:10 AM
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#16
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PMB Performance Group: Admin Posts: 19,275 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
Yeah Michel!! (IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif)
Yeah Brian!! (IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif) You probably don't have the pins, they have to be custom made with the one large pin diameter (one pair may work). Spacers and hardware would be the ticket, also, the 911 pad springs will also be needed. Paul, Those are the exact same caliper with one difference, the bleeders are 180 degrees oppositie the 914-6/GT caliper. |
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| michel richard |
Jan 16 2006, 01:09 PM
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#17
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Senior Member Group: Members Posts: 1,291 Joined: 22-July 03 From: Longueuil, Québec Member No.: 936 |
Eric,
Did all 911 rear calipers, in 1976, have the spacer ? i.e. did all 911s have ventred rear rotors ? Because I just bid on a pair on ebay and I could'nt tell in the picture. Did not reach reserve, but I'll still try to buy them. http://cgi.ebay.com/ebaymotors/ws/eBayISAP...TRK%3AMEDW%3AIT Michel |
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| Eric_Shea |
Jan 16 2006, 01:22 PM
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#18
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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 are exactly what you need.
Yes, they have the 10mm spacers. |
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| IronHillRestorations |
Jan 16 2006, 01:30 PM
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#19
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I. I. R. C. Group: Members Posts: 6,717 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None 
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So where did you find 11.5 grade m7 hardware? I searched and searched, but couldn't find any.
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| Phoenix-MN |
Jan 16 2006, 01:49 PM
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#20
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Senior Member Group: Members Posts: 927 Joined: 23-January 04 From: ST. Bonifacius,MN Member No.: 1,590 |
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