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Dutch924-racer
Joined: 23 Jul 2007 Posts: 1076 Location: The Netherlands
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Posted: Wed May 21, 2008 4:48 pm Post subject: Convert a 931 to 924S rear trailing arms |
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I want to convert my 931 (1982) to 924S rear aloy trailing arms
What do I need besides the trailing arms. I saw in pet that the strut is also different (951 333 021 00).
And will my 931 calipers en discs fit without modification ? _________________ 937 trackday car
Series 2 engine
951S turbo and intercooler
Fast road camshaft
Forge recirculation valve + boost controller |
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gegge
Joined: 27 Jul 2007 Posts: 1124 Location: Sweden
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Posted: Wed May 21, 2008 8:28 pm Post subject: |
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You need the longer axles(bearings, CV joints?). Donīt know it you use the handbrake, but that one is different as well. _________________ Carl Fredrik Torkildsen
924 turbo -81 Carrera GT RESTOMOD
924 turbo -80 Dolomite De Luxe
924 -85 DP kit, BBS RS, M030 and tuned engine
924s -86 Black on black turbo with Fuchs |
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vexed73
Joined: 05 Oct 2007 Posts: 187 Location: EASTERN, nc.
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Posted: Wed May 21, 2008 9:27 pm Post subject: |
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Not trying to sound dumb but why switch? _________________ 1982 PORSCHE 931 |
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ideola
Joined: 01 Oct 2004 Posts: 15548 Location: Spring Lake MI
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Posted: Wed May 21, 2008 10:20 pm Post subject: |
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The alloy suspension setup is MUCH lighter than the stock 5-bolt steel setup on the 931. Don't know the exact weight difference, but I know I can lift a complete alloy suspension assembly and move it around no problem, while the steel setup was barely doable with a piano dolly. Plus if you get the 87- 951 setup, you can get the late offset and the 951 4-pot calipers OR bolt-on any of the aftermarket 951 big brake upgrades. _________________ erstwhile owner of just about every 924 variant ever made |
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Rasta Monsta
Joined: 12 Jul 2006 Posts: 11723 Location: PacNW
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Posted: Thu May 22, 2008 1:28 am Post subject: |
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951 Brembo calipers should bolt up to any rear disc setup.
I was just looking at this. Here is what I came up with:
Trailing arms
Spring plates
Axles
Stub axles
Handbrake cables
Brake hard lines
Trailing arm, torsion mount, and spring plate bushings should all be replaced while apart. T-bars too, if you want to stiffen the rear. _________________ Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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Dutch924-racer
Joined: 23 Jul 2007 Posts: 1076 Location: The Netherlands
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Posted: Thu May 22, 2008 5:10 am Post subject: |
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mm, thats a lot to change.
One of the reasons i want to change is for coilovers and get the torsion bars out. _________________ 937 trackday car
Series 2 engine
951S turbo and intercooler
Fast road camshaft
Forge recirculation valve + boost controller |
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ideola
Joined: 01 Oct 2004 Posts: 15548 Location: Spring Lake MI
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Posted: Thu May 22, 2008 12:13 pm Post subject: |
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If you're changing/removing the torsion bars anyway, it's not that big of a deal. Just get the entire rear suspension assembly and be done with it. I have two awaiting installation, one for the UWB project, and one for Sparky if he still wants it... _________________ erstwhile owner of just about every 924 variant ever made |
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Rasta Monsta
Joined: 12 Jul 2006 Posts: 11723 Location: PacNW
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Posted: Thu May 22, 2008 6:13 pm Post subject: |
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Coilovers require a cage. The body lacks necessary reinforcement to support the weight of the car at the upper shock mount. _________________ Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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tuurbo
Joined: 08 Aug 2007 Posts: 1446 Location: East Windsor, New Jersey
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Posted: Fri May 23, 2008 12:45 am Post subject: |
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Why do you want to change it? Like why do you want the torsion bars out and so on? Is it failing to perform with your current driving?
I read Ideola's reasons and for a guy like him who's making a monster, ok, I can see why if you're investing thousands into a monster project you might as well go all the way for an UBER track car, but...for a normal car it seems like a lot of bs. Even for a track car I'm just kind of surprised that the Porsche setup is insufficient. _________________ 1980 924 turbo, MSD, Meth. Inj, otherwise stock. |
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Rasta Monsta
Joined: 12 Jul 2006 Posts: 11723 Location: PacNW
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Posted: Fri May 23, 2008 1:39 am Post subject: |
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tuurbo, the conversion is not that big a deal. I got t-bars used for $125, and am getting the aluminum arm setup for $100 from a friend's parts car.
As for the sufficiency of the factory setup, those rubber bushes aren't likely to be in the condition they were when they left Deutschland. . . _________________ Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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tuurbo
Joined: 08 Aug 2007 Posts: 1446 Location: East Windsor, New Jersey
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Posted: Fri May 23, 2008 1:44 am Post subject: |
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Fair enough - I don't drive my car hard enough to really notice any problems I guess. |
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Rasta Monsta
Joined: 12 Jul 2006 Posts: 11723 Location: PacNW
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Posted: Fri May 23, 2008 2:50 am Post subject: |
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Well, and that is also fair enough. Your rear bushes are probably OK for light touring, but I take Shaggy on the track, and also on PCA "Arrive and Drive" tours, so I want his handling at its best. . .I have C4Ses to show up!
_________________ Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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ideola
Joined: 01 Oct 2004 Posts: 15548 Location: Spring Lake MI
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Posted: Fri May 23, 2008 12:05 pm Post subject: |
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Rasta Monsta wrote: | I have C4Ses to show up! |
Hear hear!!! _________________ erstwhile owner of just about every 924 variant ever made |
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Cedric
Joined: 27 Aug 2004 Posts: 2600 Location: Sweden
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Posted: Fri May 23, 2008 5:16 pm Post subject: |
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No you dont need a cage for coil overs. There are a bunch of 944 and 924 owners over here that run coil overs on steel trailing arms. It do need some modification, at least with this bits.
_________________ 1980 924 Turbo
www.instagram.com/garagecedric/ |
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Rasta Monsta
Joined: 12 Jul 2006 Posts: 11723 Location: PacNW
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Posted: Sat May 24, 2008 1:44 am Post subject: |
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Good luck with that. I'd be checking for cracks after every track event. _________________ Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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