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Old 04-30-2008, 10:22 PM   #1
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Default GC Spring Rates

Im thinkin about ordering some Ground Controls but im unsure about spring rates. What would you guys recommend? I'll be using these with Tokico Illuminas. I want something that comfortable for street but can also handle the track.

Thanks
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Old 04-30-2008, 10:26 PM   #2
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300f 250r - that is almost comfortable here in Atlanta with lots of potholes and steel plates everywhere in the road. I had 400f 300r and it was noticeably worse. I'm running with bilstein R shocks and they're OK.
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Old 04-30-2008, 10:29 PM   #3
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get tein basics, lol
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Old 04-30-2008, 10:51 PM   #4
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Quote:
Originally Posted by bryantaylor View Post
get tein basics, lol

lol, i was just reading that thread. I'll pass.
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Old 04-30-2008, 10:52 PM   #5
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m2, the roads here are really good, flat and smooth. How much stiffer did the 400/300 feel?
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Old 04-30-2008, 11:04 PM   #6
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Significantly... but I'd wait for more input from others that are running higher rates on smoother roads. My only other experiences are with race rates... though did run 800f and 350r at Sebring.
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Old 05-01-2008, 10:53 AM   #7
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I run 300f/220r here in ATL, with the same Bilstein R shocks m2 is using. I wouldn't want to use much stiffer 'round these parts.
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Old 05-01-2008, 10:58 AM   #8
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Mlow is running 450 or 500 front and 300 rear on his Koni sports and it's rough... personally I'd daily drive it with those rates here as the ride doesn't bother me much at all. I will hopefully be running a similar setup before long.
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Old 05-01-2008, 11:06 AM   #9
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500/325 seems to be a pretty fast autox/dd setup on my friend's CSP NA. I run 700/325 and it's really not bad.
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Old 05-01-2008, 11:28 AM   #10
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Running 450/350 on my Koni yellows. Personally I like it. On the wife scale, it's a little on the rough side..... And that's with lovely cdn roads too.

You need to make sure you don't go too high a spring rate above what those shocks will handle though.....

Dave,
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Old 05-01-2008, 11:53 AM   #11
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if I can run 400 330 Flex on DC roads, you can run at least that on smooth roads.

rob: pansy.
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Old 05-01-2008, 02:09 PM   #12
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Would you guys buy a GC set with 40K on them? 375fr-250 r
How much would you offer?
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Old 05-01-2008, 04:03 PM   #13
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for GC sleeves/perches/springs, etc., I'd figure ~$200 used. I see nothing wrong with buying these used.
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Old 05-01-2008, 04:30 PM   #14
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I run 650fr 450 rr on Koni yellows and I am pretty happy, I do want more spring up front though, it's not that bad IMO.
As far as your shocks go, I have no idea what they can handle...you do not want to overpower them with too much spring.
I'd give $200 for a used set. No more though.
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Old 05-02-2008, 07:42 AM   #15
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if I didn't track my car frequently, I would not enjoy the 450/375 rates with Bilstein. If you don't track the car, get the standard rates.
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Old 05-02-2008, 07:47 AM   #16
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700/450 here, scheduled to do 15,000 miles this year. The shocks make or break the setup.
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Old 05-02-2008, 10:58 AM   #17
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what savington said. I would be fine running 400 lb springs on an illumina or a bilstein but I wouldn't run stock springs on a koni or an AGX.
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