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slpdesign99 · Posted: Wed Dec 10, 2014 6:23 pm Post subject: GAZ coilovers to suit 931

Looking at these for a street some track 931. What are they like and will these fit with the steel rear arms?

http://gazcoilovers.com/porsche-924-gaz-coilover-kit-p-209.html
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Scott (slpdesign 99)
1982 Porsche 924 Turbo
1964 Saab 96 Sport Replica
2008 Renaultsport Megane Team F1 R26
2006 Jeep Grand Cherokee SRT8
1990 Daihatsu Charade GTti Tarmac Rallycar
1979 Volvo 242GT, 4.2l V8

leadfoot · Posted: Wed Dec 10, 2014 11:44 pm Post subject:

http://www.924board.org/viewtopic.php?t=33019&sid=21cd6c67e3739e75b1f3366293c6fbcf
google advanced search is your friend...
Stu
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1981 ROW 924 Turbo -
carbon fiber GT mish mash
LS1 conversion in progress...

slpdesign99 · Posted: Fri Dec 12, 2014 11:16 am Post subject:

Carrera RSR · Joined: 08 Jan 2010 Posts: 2312 Location: Somerset, UK

They are very track orientated. Perfect for hooning on smooth surfaces, can be a chore at low speed on rough roads. Rears need the thumb screws being swapped out for flat head screws and the steel arms need a hole cut in them for screwdriver adjustment. They are 924 turbo/early 944 fitment with 944 race valving, so may be stiffer than stock, but GAZ will valve to your requirements when buying direct or via a good reseller. Originally set up to be resting on the torsion bars with helper springs on the rear GAZ. Now set up resting in the GAZ springs with the torsion bar as a helper.
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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
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slpdesign99 · Posted: Sat Dec 13, 2014 7:17 am Post subject:

Thanks Careers RSR that sounds great. Here is Australia we have a scheme where if your car is 25 years or older you can register it for the road on a 45 90 use at a massive discount. This is my plan so having stiff suspension not going to be to much of an issue in my world 😃
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Scott (slpdesign 99)
1982 Porsche 924 Turbo
1964 Saab 96 Sport Replica
2008 Renaultsport Megane Team F1 R26
2006 Jeep Grand Cherokee SRT8
1990 Daihatsu Charade GTti Tarmac Rallycar
1979 Volvo 242GT, 4.2l V8

Pumba · Joined: 22 Feb 2013 Posts: 11 Location: Poland

Based on my experience - I would change to aluminum wishbones ( late 944's ) and then GAZ Gold Coilovers. And I'd go for removal of the torsion bars.

Way more space, removing weight from the rear axis, ability to change ride height easily.

MikeDanger · Joined: 21 Nov 2002 Posts: 774 Location: Denver

Carrera RSR · Joined: 08 Jan 2010 Posts: 2312 Location: Somerset, UK

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

Pumba · Joined: 22 Feb 2013 Posts: 11 Location: Poland

I ment that the whole rear suspension weighs less when you remove the t-bars ( reducing unsprung mass ). Also, you can cut off rear supports of the torsion bar tube ( with steel trailing arms I even had to do it to fit GAZ coil-overs )

When using steel trailing arms there is a problem with GAZ shock regulation system. It is covered by the shock support. Also - the spring if you go coil-over runs very close to the trailing arm ( in my case it was even scratching it ).

EDIT: Of course, if you have a custom solution, these problems may not occur.

Carrera RSR · Joined: 08 Jan 2010 Posts: 2312 Location: Somerset, UK

Gaz supply offset bushings to avoid fouling when asked. They will supply a rear strut with screw adjustment so once the steel trailing arm has an access hole drilled in its super easy to adjust. On a narrow body 924 I would stick with steel arms. On a wide body car ally may be a help with wider wheels to fill the arches. Torsion bars may be added weight but they work well in conjunction with coil overs.
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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

Pumba · Joined: 22 Feb 2013 Posts: 11 Location: Poland

Hmm... Also, if you only add a coil-over, you will not have a thick spring...

I had 300lbs on the beginning ( with t-bars removed ) and that was probably maximum to avoid collisions between the spring and the trailing arm. Now, with 500lbs it is worse. That is why I'm changing steel to aluminum trailing arms.

In that case the only thing left speaking against keeping t-bars is height regulation, that is up to you.

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

Keep in mind the torsion bars are still part of the unsprung weight and they are lower in the car so there's no change in center of gravity compared to adding larger coil springs to the rear shocks.

Also some have reported that excessively heavy coil spring/damper rates can crack the upper shock mounts, so you might plan on bracing the upper and lower mounts.

If you want to reduce weight in the rear suspension, then you'll need to look at hollow torsion bars, lightweight axle shafts, etc.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)