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GeorgeV
Joined: 14 Mar 2010
Posts: 306
Location: Brisbane, Australia
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 Posted: Mon Jan 11, 2016 11:10 pm Post subject: |
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| ideola wrote: | | The only 15" wheels I've seen that will clear Brembos are vintage three piece BBS. None of the standard Porsche 15" rims will clear. Also, the 911 16" Fuchs will not clear, if you want to run 16" Fuchs with Brembos, you have to get the 951 part number. |
Dan, will the 86 951 Brembos clear 16" D90s with right offset?
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1981 932 with mods:
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2595
Location: MI
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| Posted: Mon Jan 11, 2016 11:42 pm Post subject: |
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| nickthompson wrote: |
One huge advantage of the Volvo calipers is availability of parts. They made millions of 240s and you can get parts for them anywhere. |
The calipers off of the 91-93 Volvo 240's with ABS are the ones you want as they only have 1 brake line input so no cross drilling or line splitting required.
They also fit the OEM 931 brake lines so you can pretty much just bolt them on and go. You can find them cheap likely <$150 for a fresh rebuilt pair, and they have good aftermarket pad selection.
Here is a good example, note in the pics there is only one green brake line plug for the models with ABS.
http://www.ebay.com/itm/Cardone-19-1625-Replacement-Front-Driver-Side-Caliper-/311507991998?hash=item488752bdbe:g:Qf0AAOSw~otWdg6n&vxp=mtr
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80 Turbo - Slightly Modified |
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ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
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| Posted: Tue Jan 12, 2016 12:26 am Post subject: |
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| GeorgeV wrote: | | Dan, will the 86 951 Brembos clear 16" D90s with right offset? |
Yes, I had D90s on the Club Sport as rollers while I was waiting for my 7Jx16" Club Sport rims to be powder coated. As far as I know, most of the OEM Porsche 16" rims will work with the exception of the 911 part # Fuchs. I did run into a situation with some 16" BBS rims where the honeycomb was set too far back and interfered with the Brembos, so you have to be really careful with deep dish aftermarket rims.
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Tue Jan 12, 2016 4:08 am Post subject: |
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| GeorgeV wrote: | | Dan, will the 86 951 Brembos clear 16" D90s with right offset? |
Clearance between caliper and wheel is tight...creates an awesome look, especially when the calipers are refinished!
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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GeorgeV
Joined: 14 Mar 2010
Posts: 306
Location: Brisbane, Australia
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| Posted: Tue Jan 12, 2016 8:19 am Post subject: |
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Guys , thanks for the replies.
What are the options for upgrading the rear calipers? Just Volvo or anything else?
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1981 932 with mods:
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Kenodog
Joined: 25 Jun 2003
Posts: 2669
Location: Vancouver,B.C.
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| Posted: Tue Jan 12, 2016 8:34 am Post subject: |
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1986 951 Brembos if you can source the rear alu trailing arms.
Leigh
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1979 Euro 931, Olive
1981 931, Sabine
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Rasta Monsta
Joined: 12 Jul 2006
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Location: PacNW
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| Posted: Tue Jan 12, 2016 10:04 am Post subject: |
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I think all he needs is the cast caliper carrier and he can use the steel arms.
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peterld
Joined: 10 Dec 2006
Posts: 981
Location: Noosa Heads QLD Australia
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| Posted: Tue Jan 12, 2016 11:36 am Post subject: |
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Rear Brembo 4 spotters off 951/S2/968 will bolt straight onto rear 931/932 5 lug.......No modifications other than a small snip out of the backing plate/dust shield. Or better still.....piss the backing plates off altogether!
As for D90 fitment.....don't know. Mine works well under 8" or 9" x 16 911 Fuchs, or 9' x 17 993 Cup 2.
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GeorgeV
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Carrera RSR
Joined: 08 Jan 2010
Posts: 2312
Location: Somerset, UK
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| Posted: Wed Jan 13, 2016 2:07 am Post subject: |
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So please remind me the simplest and cost effective solution to fit front Brembos to a RoW 931. I want to go 951 brembo just because I like the look of the early period caliper versus Wilwood, Volvo 240, or later Boxster versions.
Can they be adapted easily to fit 931 spindle/hub? I have access to a good welder and machine shop for hole adaption
I don't want to change spindle as I don't want to mess about with the current GAZ coilovers, although if its a small hole adaption then OK
If I go 951 spindle I would need to drill a hole in the LHS spindle to take the cable speedo
Stock 931 disc compatibility? Fuchs 16'' so should be OK here for clearance. Anything else?
As previous post the rear Brembo is bolt on.
I researched this some years ago and parked it due to engine and bodywork coming first. Now don't fancy searching all over again as it'll likely be 100 pages of opinions before I find the actual answer. Is the a 'how to thread?. The stock brakes and 1100kgs stops quite well so why change!!?? Cause I can!
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
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| Posted: Wed Jan 13, 2016 3:21 am Post subject: |
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Rears: bolt spacing for all single and multi-piston rear calipers is the same, so you can technically install the Brembos on the steel trailing arms. I believe I read somewhere that a couple of washers or spacers may be required, as the mounting flange may be thinner on the steel caliper carrier than the alu, but I can't find the reference.
Fronts: this is not so straight foward. The bolt spacing for floating single piston calipers is ~76.5mm, whereas the bolt spacing for the Brembo front calipers is 94mm. I haven't looked in a long while, but from memory, there is not enough room to simply elongate one of the holes on a standard 924/931/944 spindle. You could weld on more material, and then re-machine and re-drill, but that seems like a lot of effort. In my mind, it is far easier to get the hub+spindle+strut housing from an 86 951 and be done with it. In your case, if you've modified your front strut housings for coil-overs, you would have to do that again on the 951 strut housings, as again, the flange width and bolt spacing for the spindle-to-strut housing are different, and the hub-spindle diameter is different.
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morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
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| Posted: Wed Jan 13, 2016 7:19 am Post subject: |
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Dont mess about with welding and stuff when it comes to brakes.
Buy or build some adaptors.
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Carrera RSR
Joined: 08 Jan 2010
Posts: 2312
Location: Somerset, UK
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| Posted: Wed Jan 13, 2016 8:18 am Post subject: |
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| ideola wrote: | Rears: bolt spacing for all single and multi-piston rear calipers is the same, so you can technically install the Brembos on the steel trailing arms. I believe I read somewhere that a couple of washers or spacers may be required, as the mounting flange may be thinner on the steel caliper carrier than the alu, but I can't find the reference.
Fronts: this is not so straight foward. The bolt spacing for floating single piston calipers is ~76.5mm, whereas the bolt spacing for the Brembo front calipers is 94mm. I haven't looked in a long while, but from memory, there is not enough room to simply elongate one of the holes on a standard 924/931/944 spindle. You could weld on more material, and then re-machine and re-drill, but that seems like a lot of effort. In my mind, it is far easier to get the hub+spindle+strut housing from an 86 951 and be done with it. In your case, if you've modified your front strut housings for coil-overs, you would have to do that again on the 951 strut housings, as again, the flange width and bolt spacing for the spindle-to-strut housing are different, and the hub-spindle diameter is different. |
I didn't adapt the strut housing, I have £800 worth of GAZ Gold coilovers with 931 fitting, so do not want to be buying new coilovers to fit 951 spindles. I'll look into machining an adapter block/plate to retain existing spindles and coilovers. I think this is why I parked this idea 4 years ago
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
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ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
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| Posted: Wed Jan 13, 2016 12:18 pm Post subject: |
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If the GAZ coilovers fit on unmodified 931 strut housings, I'm unclear why the 86 strut housings would have to be modified to accept them. The spring perch is the same, and the 951 housings are rebuildable like all early 944 / 924 strut housings, meaning that your GAZ inserts should drop right in. The only difference is the bolt spacing for the spindle and the width of the flange that the spindle attaches to.
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morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
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| Posted: Wed Jan 13, 2016 6:28 pm Post subject: |
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I dont think you can take the cartrige out of the GAZ coilovers, can you? And even if you could, they would not fit the OEM struts as they are complerely different...at least the rears i have are completely different from the OEM parts.
I think your only choice is to modify the GAZ struts to accept the 951 spindles. I have done this on the OEM 944NA struts and i'm using 931/944 NA struts with 951 spindles.
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