Suspension & Brakes Springs | Shocks | Handling | Rotors

Which springs do you prefer...

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Old May 23, 2023 | 09:12 PM
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Default Which springs do you prefer...

I have a 99 Z28 that needs springs. I've narrowed it down to bmr, or umi. I'm looking for a streetable ride while improving cornering and handling at higher speeds. Anyone have either set? Looking for ride characteristics. The bmr kit lowers the entire car 1 1/4 inches, while the umi kit lowers the front 1 1/4 and the rear 1 1/2. Wondering which is going to handle better. Any help is greatly appreciated.
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Old May 24, 2023 | 07:24 PM
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Before you make a decision, check out Sam Strano Springs.
http://www.stranoparts.com/partdetai...=113&ModelID=7
I’m very happy I went with these.
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Old May 26, 2023 | 08:59 AM
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Sam Strano is the go to guy
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Old May 26, 2023 | 09:16 AM
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Youre not going to be disappointed with either set, especially if you pair them with good shocks...i have owned both on 2 different fbodys with Koni's and Bilsteins....i have not owned a set of strano springs but people who have love them...just stay away from eibach sportlines, they are extremely low and ride like crap
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Old May 26, 2023 | 11:44 AM
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The Eibach Pro-Kit is great, but the Eibach Sportline's are deliberately designed to slam the car. Not a good idea. Nothing is more important for springs to work right than great shocks/struts.
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Old May 31, 2023 | 12:17 AM
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I have Strano springs and Koni Sport shocks on my 99 TA. I'm going to order THIS SET of Strano springs and Koni STR.T shocks for my 98.

You will be happy with Strano, UMI or BMR, just make sure you have shocks to match.
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Old May 31, 2023 | 06:03 AM
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Default Great!

Originally Posted by Daydream
I have Strano springs and Koni Sport shocks on my 99 TA. I'm going to order THIS SET of Strano springs and Koni STR.T shocks for my 98.

You will be happy with Strano, UMI or BMR, just make sure you have shocks to match.
Excellent performance, none better. Sam also makes sure his F+R springs have a matched bounce frequency, which almost no one does when creating a homemade spring set. Very cost effective too. Sam's decades of winning in Showroom Stock translates into the vastly superior products that he sells.
PS Nothing ruins a great set of springs faster than cheap, ineffectual struts/shocks.
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Old Jun 4, 2023 | 10:32 AM
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I would also recommend calling Sam.
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Old Jun 4, 2023 | 10:35 AM
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BTC Still my favorite from GMMG
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Old Jun 4, 2023 | 11:14 AM
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For a basic upgrade in ride and handling the Strano springs & Koni orange SRT.T shocks are outstanding. Very happy with them on my 02 Z28.

For a basic upgrade favoring ride and good handling the Strano springs & Bilsten's will probably ride better. Based on discussions with Sam Strano. Have Bilsten's & Eibach's on my 99 T/A, the T/A rides better than my 02 Z28. That's even with the shitty Eibach springs that have some sag now after 20 years on the T/A.

Avoid Eibach springs, call Sam Strano and you'll get a great combo!

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Old Jun 4, 2023 | 11:20 AM
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Originally Posted by 99 Black Bird T/A
For a basic upgrade in ride and handling the Strano springs & Koni orange SRT.T shocks are outstanding. Very happy with them on my 02 Z28.

For a basic upgrade favoring ride and good handling the Strano springs & Bilsten's will probably ride better. Based on discussions with Sam Strano. Have Bilsten's & Eibach's on my 99 T/A, the T/A rides better than my 02 Z28. That's even with the shitty Eibach springs that have some sag now after 20 years on the T/A.

Avoid Eibach springs, call Sam Strano and you'll get a great combo!
To be fair to Eibach, the Pro-Kit work great and with great shocks? They maintain their ride height for decades. With crap shocks, they will sag fast.
Sportline's are exclusively for slamming the car. Catering to a weird ambition from the start.
Nothing is as good a choice as whatever Strano recommends.

Last edited by LSX Thunder; Jun 5, 2023 at 05:44 AM.
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Old Jun 6, 2023 | 11:18 AM
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Originally Posted by LSX Thunder
To be fair to Eibach, the Pro-Kit work great and with great shocks? They maintain their ride height for decades. With crap shocks, they will sag fast.
Sportline's are exclusively for slamming the car. Catering to a weird ambition from the start.
Nothing is as good a choice as whatever Strano recommends.
Did you seriously just say that shocks cause spring sag?
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Old Jun 6, 2023 | 11:30 AM
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Originally Posted by 79_T/A
Did you seriously just say that shocks cause spring sag?
Yes, I did, because it is true. I've written about metal fatigue also in other contexts. The damping that a properly working shock(strut) uses does not just affect the ride and handling of a car. It also tempers the extremes of spring travel. Without proper damping? Metal fatigue is the result, the spring loses its temper and also loses its ability to maintain the static height. This is a fact. Moog ran a series of tests ages ago (like in the 70's) showing what happens with bad shocks. They drained the fluid of the struts and shocks and reinstalled them and ran the springs through many cycles. Soon, the springs had lost their temper completely (these were all Moog springs) and dropped the static height of the car.
Trivial pursuit time. Gabriel, looking to increase shock sales, published some research again long time ago. It seems they went to hundreds of junkyards and recycling centers and found that 78% of all the dead cars there had the original OEM struts/shocks. Gabriel considered this sinful, extrapolating that the owners junked their cars never making an association between the original dampers and wanting to junk the car. Made a point of writing about how destroyed the suspensions were (and undoubtably slammed). "Shocks cause spring sag?" Glad you asked.

Last edited by LSX Thunder; Jun 6, 2023 at 12:08 PM.
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Old Jun 6, 2023 | 06:34 PM
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I'm assuming that is due to the shock not dampening the spring frequencies and those frequencies degrading the metal.
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Old Jun 7, 2023 | 06:38 AM
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Originally Posted by wannafbody
I'm assuming that is due to the shock not dampening the spring frequencies and those frequencies degrading the metal.
You are correct sir!
It is ironic that the bounce frequency of any matched F+R springs are unaffected by the shocks/struts. That's why even with no damping the car stays level as it bounces and with any brand of dampers. That Moog test with all the fluid drained proved that too, even though it was understood from the first times springs were used in a car (or wagon. In fact, the wagon maker at Colonial Williamsburg, Va. will be happy to explain his job to tourist telling them how he calculates which F+R springs he would use, and he is pretending it's 1775). Unaffected in how the spring works but not in how long before the spring is junk. The Gabriel survey of cars waiting for the crusher shows how few owners understood how the quality of the car's ride and handling was affected by worn out dampers. Aftermarket springs too. All those engineers go crazy to get the car to stay level as it drives. Which is why sets of four OEM or replacement springs are necessary. Sure, Moog or the like will sell you one or two springs but it's your responsibility to buy springs that are matched in F+R BF. That's discrimination and being prejudiced against inferior springs that don't keep the car level as it goes down the road. The various uninformed comments disparaging paying attention to bounce frequency only prove that ignorance is bliss.

Last edited by LSX Thunder; Jun 8, 2023 at 10:35 AM.
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Old Jun 10, 2023 | 11:27 AM
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Sam the man Strano!!!
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Old Jun 10, 2023 | 11:46 AM
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Originally Posted by WBO_COTTO
Sam the man Strano!!!
Just ordered his springs and koni sports myself.... tomorrow the 4x4 look and mushy handling goes bye bye
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Old Jun 12, 2023 | 01:44 PM
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Another Strano/Koni vote here!!
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Old Jun 17, 2023 | 06:44 AM
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Originally Posted by 99Silver6.0
Another Strano/Koni vote here!!
Sam has some Billsteins that are custom revalved to his specs by Bilstein, matched to different springs. All of them are much better than any OEM springs/struts/shocks. He also will give you the best adjustments for the Koni's depending on your intended use.
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Old Jun 17, 2023 | 08:24 AM
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Strano springs with Koni Sports. The handling is absolutley amazing.








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