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flosho · Posted: Thu Mar 06, 2008 2:35 pm Post subject: Rear Coilovers for DIRT CHEAP!!

Saw this the other day, but thought it was $650 per side, but no... It's for both sides!

http://www.ground-control-store.com/products/description.php/II=749/CA=159
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pocketscience · Posted: Thu Mar 06, 2008 3:08 pm Post subject:

mmm... looks nice...

Are all 924/944/968's the same with respect to this??

G.
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Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Interesting. You buying, Flosho?

My first thought was "Cool, easy helper springs" but then I realized if you used these you would need to re-index anyway, so might as well toss the t-bars.

My second thought was, would my steel trailing arms tolerate the load?
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morghen · Joined: 21 Jan 2005 Posts: 9095 Location: Romania

eye candy is good....but are these things realy any good? i'm looking to buy fronts and rears for my car...Flosho...will you be the lab-rat for this ?

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924RACR · Posted: Fri Mar 07, 2008 1:40 am Post subject:

My teammate Chris recently got a better deal; monotube, digressive valved, double adjustable race shocks for the rear from Carrera/QA2. I think they were around $200 ea ($400 for the car). Definitely cheaper than this. Only downside is you need to drill out the mounts to use a 1/2" bolt, but that's not too bad work - I've already done this on my car.

Not sure if they're threaded body, might be a small additional charge.
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Raceboy · Joined: 01 Mar 2004 Posts: 2327 Location: Estonia, Europe

I'd be interested in double-adjustable rear coilovers to get rid of the t-bars on the track car and fabricate something in a manner of Kokeln rear subframe. Really, I don't feel comfortable paying couple of thousand $ for it if I can make it by myself in a few days.

But so far, affordable double-adjustable coil-overs have been the hurdle.
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flosho · Posted: Fri Mar 07, 2008 2:24 am Post subject:

Well I'm not sure if anyone has these on their 924, Ground Control HAS been making coilovers for quite some time, and there are many other makes/cars that ARE running these with good results.

I'm just excited that the these are relatively inexpensive. There might be a better solution out there for the hard core road racer.. but for auto-x racer, you save 700 dollars on the rear.. Seems like any performance gain you give up by going with the GC setup wouldn't be worth a $700 difference.

I'm serious considering either these rear coilovers, or cgt rear flares and front fenders.
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Martijnus · Joined: 29 Dec 2006 Posts: 2019 Location: Netherlands

wow... with the current euro-dollar rate I only have to sell one kidney for these!

no seriously... looks like a nice deal to me

rasta... good point, haven't looked where the shocks are mounted, but the more near the axle, the less they have to tolerate...

actually, when using torsion bars the arm has to be stronger than when the pressure is guided away closer to the axle..

but that's not 100% true... depends on the design of the arm...
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924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
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924RACR · Posted: Fri Mar 07, 2008 5:58 am Post subject:

OK, dug through my emails - it's a QA2 "Proma Star" shock from Carrera, apparently. They can be had threaded body or not, single- or double-adjustable.

He found the threaded-body, double-adjustable version online for $249 ea. Not sure where.

Here's a related page from a rennlister:
http://members.rennlist.com/dan10101/chapter_20%20-%20Coil-overs%20-2-.htm

They're very inexpensive. Carrera's been in the shock business for some time.

Here's some listings from Summit Racing:
http://store.summitracing.com/egnsearch.asp?N=700+115+303797&D=303797

Not so sure about GC; I've heard mixed reviews...
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'79 924 #77 SCCA H Prod racecar
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flosho · Posted: Fri Mar 07, 2008 7:50 am Post subject:

Seems like with the QA1 shocks, you have to fab your own mounting system for the lower shock mount?

Seems the GC shocks either come with the hardware, or you can reuse the stock lower shock mount bolt.
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Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Wouldn't reuse the same bolt. . .far different shearing forces than it was intended for.
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flosho · Posted: Sat Mar 08, 2008 10:14 am Post subject:

Jason,

The steel arms are actually somewhat preferred over the cast as the lower mounts are favorable to side-load compared to the single-point mounts of the late models cars. The only problem with early steel arms is that most aftermarket coil-overs use the larger diameter bolts from the later models. No worries, though, most speed shops will have all the parts required to make them fit (shims, etc).

The only nice-to-do item I would also recommend is to replace the torsion tube end bushings with either Weltmeister (poly-graphite) or Racer's Edge (delrin).

Skip
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Martijnus · Joined: 29 Dec 2006 Posts: 2019 Location: Netherlands

in what way will this be an improvement?

I've got some ideas which are probably the right ones...but I'd like to hear it from you all

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"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment

flosho · Posted: Sat Mar 08, 2008 12:02 pm Post subject:

Well these coilovers are the same improvement any coilover system is. You could use these in tandem with the original suspension, or you can delete the torsion bars, and go soley with the GC setup.

It allows you to adjust the ride height quickly and easily. I believe you could also set up the corner weight of the car using a coilover shock on all 4 corners. It's just overall easier to adjust the ride height and stiffness compared to the torsion bar system that comes stock.
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sparky · Joined: 27 Nov 2002 Posts: 772 Location: Malta

Hmmm this sounds very interesting, I might get a set of these once the other suspension bits are installed..

Here is an interesting thought.. how much weight would be saved by removing the torsion bars?

Cheers,
SparkY
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