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Coilover guys .. Spring rates..

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Old Oct 23, 2008 | 06:29 PM
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Default Coilover guys .. Spring rates..

Okay, So what lb springs are you guys using in the front ? I have a Ground control adjustable coilover setup front & rear. With Koni's. and Eibach springs.

My fronts are part # 1000.250.0450 .. So, i take it thats 450lb springs.. Now what is everyone running for street use.. ??
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Old Oct 23, 2008 | 06:51 PM
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Well, i just talked to Ground control and they told me the 450lb spring is going to be the best for me being a street car ..
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Old Oct 23, 2008 | 08:53 PM
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I'm running Hyperco OBD 10" 600 in./lb. up front, but I've also ran 550 in./lb., and 625 in./lb..

Strano's front springs are 550 in./lb., that's probably is what he would recommend, but that also depends on where you set your ride height at..
But don't take my word on it; ask Strano himself.

Last edited by 99Bluz28; Oct 23, 2008 at 09:16 PM.
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Old Oct 23, 2008 | 08:58 PM
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Hows it ride on the street ??
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Old Oct 23, 2008 | 09:13 PM
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i have strano's springs that are 550 front with koni SAs and it's very comfortable even on rough streets, if i was going to switch to coilovers (which i will in the future), i will/would go heavier. probably start at 600 and work my way to where i like it, same with rear.

i drive a lot of canyons with occasional track days and the car's not a DD, so a firm ride is not only what i expect, it's what i want if the correct performance matches

if you go on frrax.com there will be a larger crowd that can give you better feedback on stiffer coilover springs
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Old Oct 23, 2008 | 09:28 PM
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It's(600s) very similar to the LT1 front eibach pro-kit and the Kenny Brown Hypercoil front springs, but just maybe a little sharper jolt over expansion joints in the road. With the 550s I didn't notice any detectable difference compared with the LT1 pro-kit, or K.B. hypercoil frt. springs.
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Old Oct 23, 2008 | 10:35 PM
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I'm running the 650# fronts and 175# rears on my daily driven Z28. I love them, some times It makes me wish I had gone with the 700# fronts instead, but streets in Cleveland suck sometimes. The car feels very precise and predictable very neutral. My setup works very well for a DD, weekend Autocross & track day car.

Also keep in mind that different people have different tolerance levels. Now my wife is very sensitive due to a host of health issues and sometimes the ride is to harsh for her. So we take the truck with the soft bouncy suspension during those times, other times she love driving it.
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Old Oct 23, 2008 | 10:39 PM
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Originally Posted by Killer_Bluebird
Also keep in mind that different people have different tolerance levels. Now my wife is very sensitive due to a host of health issues and sometimes the ride is to harsh for her. So we take the truck with the soft bouncy suspension during those times, other times she love driving it.
That's the truth. About people having tolerance levels. I don't know what your wife prefers.
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Old Oct 23, 2008 | 10:54 PM
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Hmm,, i may have to try the 600's.. My wife is usually game for anything.. she used to have an lt1 camaro herself ...
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Old Oct 24, 2008 | 08:44 AM
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I've had...

Stock springs on a set of revalved Bilsteins (speced by Sam)
450s on a GC kit with the same Bilsteins
550s on a GC kit with SA Konis
600s on a GC kit with SA Konis


Not surprisingly, the stock spring / Bilstein package had the best ride quality. Next best was the 450 kit.

Believe it or not, in my particular application the 600s actually ride better than the 550s did.

Same shock settings. Same height. Same tires. *shrug* YMMV
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Old Oct 24, 2008 | 11:42 AM
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hey ironhead.. About how low do you have your 600's .. ? And is it the 10" height and 2.5" diameter ones ..?
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Old Oct 24, 2008 | 01:44 PM
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Originally Posted by Vndcatr
hey ironhead.. About how low do you have your 600's .. ?
Not very. I need my suspension to work.


Measured at the fender lip... about 26.5" in front and 26.75" in the rear.



Originally Posted by Vndcatr
And is it the 10" height and 2.5" diameter ones ..?
I *think* they're 10" springs but it's been a while. Does this look like yours?

Last edited by Ironhead; Oct 24, 2008 at 01:52 PM.
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Old Oct 24, 2008 | 01:58 PM
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I can get you the springs.... Not a problem. The are indeed 10" springs, and you can see that I usually do Hypercoil since they cost a touch less, but also have tighter tolerances than Eibach ERS's tend to.
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Old Oct 24, 2008 | 02:59 PM
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Originally Posted by Ironhead
Measured at the fender lip... about 26.5" in front and 26.75" in the rear.
measure from ground to fender lip??
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Old Oct 24, 2008 | 03:14 PM
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Uhh.... yes.....
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Old Oct 24, 2008 | 04:41 PM
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Originally Posted by Ironhead
I *think* they're 10" springs but it's been a while. Does this look like yours?
Thats exactly what mine looks like, just Eibach springs..And thanks Mr. Strano, i will be contacting you soon ..
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Old Oct 24, 2008 | 05:10 PM
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I got 500# fronts and the 150# rears and I know I'm going to replace them with 600# fronts and 175# or 200# rears.

the reason why I'm thinking 200lbs rears is because I'm running two stealthboxes and two 10" subs and the amp rack plus the two amps and the wiring, I'm definitely carrying an extra 100 pounds back there.
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Old Oct 24, 2008 | 06:06 PM
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Yea i have 2 amps, and a 12" Type R sub in the back also..Something to keep in mind also , thanks
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Old Oct 25, 2008 | 09:50 AM
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jeez, you guys and your 600+ lb/in springs. Ive got my pro-kit 400 lbs. on my DD. I like it. Certainly, if my car was just the toy, id have something stiffer, but i cant imagine going as high as 700
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Old Oct 25, 2008 | 12:43 PM
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Yea the most im gonna try is probably a 550lb spring . Sam is gonna call me monday with a price on them (Thanks for taking my call sam) ..
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