New PMB 914-6 Rear Calipers, Preproduction Info |
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New PMB 914-6 Rear Calipers, Preproduction Info |
914Sixer |
Jun 7 2024, 06:24 AM
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#1
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914 Guru Group: Members Posts: 9,004 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
Saw this at PMB site, passing it along.
Attached thumbnail(s) |
Graydingo |
Jun 7 2024, 07:26 AM
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#2
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Member Group: Members Posts: 52 Joined: 12-August 22 From: Las Vegas Member No.: 26,768 Region Association: Southwest Region |
Great price. With the GT vented choice, the caliper comes with the spacer installed. For the proper rear rotor, I'm reading old posts saying use an SC 911 vented rear rotor but I need to machine a bit off to clear?
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tailwind22 |
Jun 7 2024, 07:46 AM
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#3
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Member Group: Members Posts: 89 Joined: 7-November 17 From: Moses Lake, WA Member No.: 21,583 Region Association: Pacific Northwest |
Yes the rotors need to be machined to reduce the diameter a bit. Had Eric at PMB do mine. Very reasonable price and quick in and out back to me.
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914werke |
Jun 7 2024, 09:58 AM
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#4
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"I got blisters on me fingers" Group: Members Posts: 10,777 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest |
So I didnt see it described there but there was an alum alloy ver prior are these the same?
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burton73 |
Jun 7 2024, 01:24 PM
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#5
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burton73 Group: Members Posts: 3,658 Joined: 2-January 07 From: Los Angeles Member No.: 7,414 Region Association: Southern California |
Eric put those on Mark Sonners car in rear with the 15 inch 7r copies or deep 7s - Vented rotors on the copy of 914-6 caliper.
I asked mark to try to get a picture of the rear set up today. Great photo ( A California Utah- We Bad) Best Bob B |
burton73 |
Jun 7 2024, 03:10 PM
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#6
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burton73 Group: Members Posts: 3,658 Joined: 2-January 07 From: Los Angeles Member No.: 7,414 Region Association: Southern California |
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infraredcalvin |
Jun 7 2024, 05:35 PM
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#7
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Distracted Member Group: Members Posts: 1,563 Joined: 25-August 08 From: Ladera Ranch, CA Member No.: 9,463 Region Association: Southern California |
So these are being made as a repop, and are designed to work with an SC rotor, why aren’t the calipers machined so that they work with the sc rotor (the consumable part) without modification? (IMG:style_emoticons/default/confused24.gif)
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Montreal914 |
Jun 7 2024, 06:33 PM
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#8
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Senior Member Group: Members Posts: 1,684 Joined: 8-August 10 From: Claremont, CA Member No.: 12,023 Region Association: Southern California |
Maybe because these calipers are 914-6 replicas? (IMG:style_emoticons/default/smile.gif) 9146-GT rear calipers were 914-6 rears with a 10mm spacers. They also used a unique vented rotor that was the diameter of the /6 rotor (286mm) but 20mm wide instead. I believe this rotor is the same as the one on the 916 (part number below). 911 rear rotors are 289mm diameter so... (IMG:style_emoticons/default/biggrin.gif)
Below are the various rear rotor dimensions I believe the outer half of the 914-6 rear caliper is 911 M rear caliper part, so only only the inner half is 914-6 specific. 914-4 rear rotor: Dia: 282mm Thk: 9.4mm 914-6 rear rotor: Dia: 286mm Thk: 10.5mm 914-6 GT rear rotor: Dia: 286mm Thk: 20mm P/N 901-352-041-12 (same as 916) |
Maltese Falcon |
Jun 8 2024, 10:59 AM
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#9
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Advanced Member Group: Members Posts: 4,822 Joined: 14-September 04 From: Mulholland SoCal Member No.: 2,755 Region Association: None |
Maybe because these calipers are 914-6 replicas? (IMG:style_emoticons/default/smile.gif) 9146-GT rear calipers were 914-6 rears with a 10mm spacers. They also used a unique vented rotor that was the diameter of the /6 rotor (286mm) but 20mm wide instead. I believe this rotor is the same as the one on the 916 (part number below). 911 rear rotors are 289mm diameter so... (IMG:style_emoticons/default/biggrin.gif) Below are the various rear rotor dimensions I believe the outer half of the 914-6 rear caliper is 911 M rear caliper part, so only only the inner half is 914-6 specific. 914-4 rear rotor: Dia: 282mm Thk: 9.4mm 914-6 rear rotor: Dia: 286mm Thk: 10.5mm 914-6 GT rear rotor: Dia: 286mm Thk: 20mm P/N 901-352-041-12 (same as 916) Correct on the # 901-352-041-12 , we have those on #40 Sonauto (IMG:style_emoticons/default/number40_914.jpg) |
Graydingo |
Jun 8 2024, 01:41 PM
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#10
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Member Group: Members Posts: 52 Joined: 12-August 22 From: Las Vegas Member No.: 26,768 Region Association: Southwest Region |
So these are being made as a repop, and are designed to work with an SC rotor, why aren’t the calipers machined so that they work with the sc rotor (the consumable part) without modification? (IMG:style_emoticons/default/confused24.gif) The non GT version of the 914-6 caliper that PMB sells (it doesn't have the spacer in the middle of the caliper halves) can work with the off the shelf non vented rotor that they also sell. So that would probably be the easy upgrade for most. For those that want a vented rotor though I think it's worth the extra effort to have the outside perimeter machined down to clear. FWIW there's an old thread on here that explains that the caliper can be moved slightly on the ears to clear the bigger diameter 911 rotor. Though I don't see how this is possible or good practice as you wouldn't want the caliper to ever shift or move. I suppose you could make offset spacer or something to lock it in the right spot. |
mepstein |
Jun 8 2024, 03:24 PM
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#11
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914-6 GT in waiting Group: Members Posts: 19,570 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
So these are being made as a repop, and are designed to work with an SC rotor, why aren’t the calipers machined so that they work with the sc rotor (the consumable part) without modification? (IMG:style_emoticons/default/confused24.gif) The non GT version of the 914-6 caliper that PMB sells (it doesn't have the spacer in the middle of the caliper halves) can work with the off the shelf non vented rotor that they also sell. So that would probably be the easy upgrade for most. For those that want a vented rotor though I think it's worth the extra effort to have the outside perimeter machined down to clear. FWIW there's an old thread on here that explains that the caliper can be moved slightly on the ears to clear the bigger diameter 911 rotor. Though I don't see how this is possible or good practice as you wouldn't want the caliper to ever shift or move. I suppose you could make offset spacer or something to lock it in the right spot. Most shops charge a pretty minimal fee to turn down the diameter of a rotor. I pay $20 to have it done. |
mb911 |
Jun 8 2024, 04:21 PM
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#12
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914 Guru Group: Members Posts: 7,200 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
I wish this was available prior to my GT brake conversion
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Montreal914 |
Jun 9 2024, 11:26 AM
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#13
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Senior Member Group: Members Posts: 1,684 Joined: 8-August 10 From: Claremont, CA Member No.: 12,023 Region Association: Southern California |
Correct on the # 901-352-041-12 , we have those on #40 Sonauto (IMG:style_emoticons/default/number40_914.jpg) Out of curiosity. I did a search online but couldn't find them available anywhere. Do you have a source in case you would need at set? They must be available somewhere... (IMG:style_emoticons/default/idea.gif) |
mepstein |
Jun 9 2024, 12:17 PM
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#14
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914-6 GT in waiting Group: Members Posts: 19,570 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Correct on the # 901-352-041-12 , we have those on #40 Sonauto (IMG:style_emoticons/default/number40_914.jpg) Out of curiosity. I did a search online but couldn't find them available anywhere. Do you have a source in case you would need at set? They must be available somewhere... (IMG:style_emoticons/default/idea.gif) I haven’t found them. Marty might have nos or a special source (IMG:style_emoticons/default/shades.gif) but it’s so easy to have SC rotors trimmed down that I wasn’t looking that hard. From what I heard Eric say in the past, they are also quite expensive. |
914Sixer |
Jun 9 2024, 12:38 PM
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#15
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914 Guru Group: Members Posts: 9,004 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
Those special rotors have not been NLA for a LONG TIME. When I sourced some around 2010 there was only 6 left at the factory.
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davep |
Jun 9 2024, 02:16 PM
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#16
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914 Historian Group: Benefactors Posts: 5,208 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada |
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Maltese Falcon |
Jun 9 2024, 08:44 PM
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#17
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Advanced Member Group: Members Posts: 4,822 Joined: 14-September 04 From: Mulholland SoCal Member No.: 2,755 Region Association: None |
Correct on the # 901-352-041-12 , we have those on #40 Sonauto (IMG:style_emoticons/default/number40_914.jpg) Out of curiosity. I did a search online but couldn't find them available anywhere. Do you have a source in case you would need at set? They must be available somewhere... (IMG:style_emoticons/default/idea.gif) Our restoration shop Aase Motors in OC had a set NOS and NLA, and installed for us. He did say I got the last set he had, and he got these at the old Vasek Polak Porsche race parts dept long ago. (IMG:style_emoticons/default/number40_914.jpg) |
mepstein |
Jun 10 2024, 05:27 AM
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#18
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914-6 GT in waiting Group: Members Posts: 19,570 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Correct on the # 901-352-041-12 , we have those on #40 Sonauto (IMG:style_emoticons/default/number40_914.jpg) Out of curiosity. I did a search online but couldn't find them available anywhere. Do you have a source in case you would need at set? They must be available somewhere... (IMG:style_emoticons/default/idea.gif) Our restoration shop Aase Motors in OC had a set NOS and NLA, and installed for us. He did say I got the last set he had, and he got these at the old Vasek Polak Porsche race parts dept long ago. (IMG:style_emoticons/default/number40_914.jpg) The right part for the right car. (IMG:style_emoticons/default/beerchug.gif) |
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